SE Controls: 2012

Monday 10 December 2012

SE Controls passes 100th employee landmark

The appointment of four new trainees sees international smoke and natural ventilation solutions specialist, SE Controls pass the 100^th employee landmark, as the company continues to grow to meet sustained demand for its products in UK and overseas markets.

The four new recruits are aged between 19 and 22 with George Geary, Josh Nolan and Danny Scotcher joining SE Controls as Trainee Window Fitters in its Northern and Southern regions, while Chelsea Beard takes on her new role as Business Apprentice at the company’s head office near Lichfield.

SE Controls’ Managing Director Will Perkins, explained: “To be successful, it’s not just about developing innovative products, expanding into new markets and clear strategic thinking, it’s also about having the right people with the right skills and committing to invest in those individuals. I’m convinced that much of our success is down to our approach of supporting our products services with high quality people that can deliver beyond expectations.”

He added: “We have a firm commitment to formal apprenticeship schemes as well as recruiting trainee’s in a range of positions at SE Controls. This not only helps us develop, design and deliver our smoke & natural ventilation solutions now, but allows us the opportunity to invest in the future success of our business. Passing the 100 employee mark is a major achievement and the fact that we have achieved it with four new trainee and apprentice roles underlines our commitment to the future of our business and the development of our team.”

SE Controls specialises in the design, project management and installation of advanced smoke ventilation and natural ventilation solutions to meet the needs of architects, contractors, building services engineers and facilities managers worldwide. Further information on SE Controls’ products, solutions and projects can be obtained by visiting www.secontrols.com or calling +44 (0) 1543 443060.

Friday 9 November 2012

SE Controls solves corridor overheating in multi-storey buildings

SE Controls solves corridor overheating in multi-storey buildings

An effective solution to overheated corridors and communal spaces in multi-storey residential buildings has been developed by SE Controls, which exploits the versatility and performance of the company’s smoke ventilation systems, allowing the controlled ventilation of hot air to maintain comfort for residents.

With the increasing focus on energy efficiency, the use of centralised boilers and distributed heating are common solutions in many multi-storey buildings for both new build and refurbishment projects. While routing hot water pipe work through corridors provides a simple method of distribution to feed individual apartments, it can make the corridors uncomfortably hot for residents as well as service and maintenance teams working within the building.

To combat this issue, SE Controls has designed a solution, which allows its smoke ventilation systems to also operate as a precisely controlled passive or mechanically assisted natural ventilation system to help maintain comfortable temperatures and energy efficiency.

By using sensors to monitor the temperature on each floor, the smoke ventilation system’s control panels automatically manage the proportional opening of end of corridor vents, smoke shaft doors and roof vents, which allows the controlled venting of hot air to cool the corridors.

SE Controls’ combined smoke ventilation and natural ventilation solution not only enables the integrity of the fire safety system to be maintained, but also provides an effective answer to corridor overheating, which has already been proven on a number of new build and refurbishment projects.

Kevin Deane, SE Controls’ Maintenance and Supply Commercial Manager, explained: “As most multi-storey buildings with more than three floors require smoke ventilation to aid escape, our systems exploit the automatic ventilation capabilities to control the cumulative thermal gain. In new build projects, we’re finding that consulting engineers, architects and developers are well aware of this issue and are incorporating this solution into building designs.”

He added: “However, one of the main advantages of the system is that it can be retro-fitted to existing smoke ventilation installations. This also enables residential managing agents to address concerns from residents and service teams over high corridor temperatures, which can often reach 30^OC, by providing an effective automatically managed solution.”

Wednesday 26 September 2012

Innovative solution for natural ventilation in schools control launched by SE Controls

The need to maintain precise control over carbon dioxide (CO₂), temperature and energy consumption is essential to create quality learning environments in classrooms and educational buildings and SE Controls’ new compact NVLogiQ room controller provides an innovative solution to meet these demands.

NVLogiQ constantly monitors indoor air quality, temperature and humidity and uses innovative algorithms, developed in conjunction with Loughborough University’s Building Energy Research Group, to control the automatic operation of windows, vents and heating to improve learning and comfort while saving energy. A manual over-ride option is also incorporated to provide additional versatility and direct control.

Capable of being used as a stand-alone classroom controller or networked throughout schools and educational buildings, NVLogiQ’s also incorporates integrated data logging to allow detailed analysis against pre-defined design and performance criteria on both new build and school refurbishment projects.

This ability also presents a range of opportunities for consultants, contractors and facilities mangers to not only verify a school’s natural ventilation (NV) design and performance, but also to enable accurate ongoing system evaluation to be easily undertaken.

As NVLogiQ has a compact and unobtrusive, with a footprint of just 160mm x 105mm, it can be located close to desks and work areas, allowing the precise monitoring of carbon dioxide (CO₂), temperature and humidity to maintain good indoor air quality and comfort levels.

SE Controls’ Natural Ventilation Division Manager, Nick Hudleston, explained: “There are clear guidelines of the volume of fresh air to be introduced into school classrooms, lecture theatres and other educational facilities to ensure that learning is not impeded by high CO₂ levels as well as elevated temperatures. NVLogiQ provides a simple, compact and powerful method of monitoring these parameters and automatically controlling the natural ventilation system to maintain a productive learning environment.”

He added: “For consultants, contractors and those responsible for managing educational buildings, the data logging facility can be used for detailed ongoing analysis, allowing the NV strategy to be ‘tailored’ precisely to the needs of the students and teaching staff, while optimising energy efficiency and comfort.”

CO₂ temperature and relative humidity readings are continuously displayed on NVLogiQ’s integral LCD screen while a red, amber and green ‘traffic light’ display gives a constant indication of indoor air quality. A manual over-ride capability is also built in to the room controller, allowing staff to temporarily open or close windows, louvres or other ventilation devices.

NVLogiQ’s versatile and powerful control structure has been designed to enable it to be used in a range natural ventilation strategies including cross ventilation and single sided ventilation as well as managing passive ventilation and night purging.

“From the outset, we designed NVLogiQ to provide an unrivalled mix of features, control and precision to help take indoor air quality, comfort and energy management of natural ventilation systems in education to the next level,” continued Nick Hudleston. “The innovative operating algorithms, integral data logging and the unobtrusive design, enables it to address a range of NV control and educational building management requirements in a highly versatile package.”

Innovative smoke and natural ventilation from SE Controls at Building Services show

Innovative smoke ventilation and natural ventilation control solutions form the primary focus of the SE Controls’ stand at this year’s CIBSE Conference and Exhibition.

A fully working model of SE Controls’ SHEVTEC® Extended Travel Distance System is integrated into the exhibition stand design to demonstrate the highly effective smoke ventilation solution, which received full Registered Detail Certification from the LABC (Local Authority Building Control) earlier this year.

The fully compliant and CE marked system gives local building control officers (BCO’s) the confidence to accept the SHEVTEC Extended Travel Distance System knowing that it has already been rigorously evaluated and tested. It also incorporates a range of additional features that enable specifiers, designers and developers to achieve a more cost effective solution without compromising safety, including the ability to reduce the size of smoke shafts to less than half of the 1.5m² required by an Approved Document B compliant natural ventilation system.

SE Controls is also launching an innovative new natural ventilation control solution, NVLogiQ, at the show, which is designed to maintain precise control over indoor air quality, temperature and energy consumption as a compact stand alone unit or as a networked system.

Using new control and performance algorithms developed in conjunction with Loughborough University’s Building Energy Research Group, NVLogiQ not only provides advanced monitoring and control of NV systems in individual rooms or zones, but also combines integrated data logging for detailed building performance and environment analysis.

NVLogiQ constantly monitors indoor air quality, temperature and humidity and via separate PSU’s (power supply units) and actuators, automatically manages the operation of windows, louvres and vents within a building’s natural ventilation (NV) system, as well as controlling the heating.

With a footprint of just 160mm x 105mm, NVLogiQ can be located almost anywhere within a building in close proximity to desks and work areas, allowing the precise monitoring of carbon dioxide (CO₂), temperature and humidity to maintain indoor air quality and comfort levels.

NVLogiQ’s integral data logging capability presents a range of opportunities for consultants, contractors and facilities mangers to not only verify a building’s NV design and performance, but to also enable accurate post occupancy evaluation to be easily undertaken.

Further information on NVLogiQ, SHEVTEC and SE Controls’ full range of smoke and natural ventilation solutions can be obtained at the exhibition in addition to visiting www.secontrols.com or by calling +44 (0) 1543 443060.

Friday 17 August 2012

SE Controls delivers ‘Gold’ standard natural ventilation at Olympic Velodrome

The London 2012 Olympic Velodrome, which has been the centre of attention for Team GB’s cycling medal haul at this year’s games, is using window automation and controls systems from SE Controls as part of its sophisticated natural ventilation solution.

Designed by Hopkins Architects, the iconic 6,000 capacity stadium has already won three major awards itself, being named the ‘people’s poll’ winner at the RIBA Stirling Prize, as well as winning the Supreme Award from the Institute of Structural Engineers and the ‘Design of the Year’ Award for Architecture in April 2012.

From the outset, the building was conceived to be a highly sustainable, low energy structure, which not only influenced the final ‘double curvature’ shape, materials selection and construction methods, but also the decision to incorporate natural ventilation into the design, developed by environmental services consultants BDSP Partnership.

The natural ventilation solution was driven by the specific needs of competitive cycling where the optimal environment is a hot and humid 28°C on the track, which reduces air density and increases race speeds as cyclist move through the air with less resistance and drag.

Under race conditions, the track temperature is maintained at these elevate levels, but the natural ventilation strategy allows fresh air to enter the building through lower level under-seat ducts, which maintains the spectator areas in the stadium at a more comfortable 18 to 26°C, before the air is exhausted through high level vents.

To provide additional ventilation, vertical vents are fitted within the velodrome’s extensive perimeter glazing, which are automatically opened and closed by 196 SE Controls 24 Volt SECO chain actuators with a 835mm stroke length. The actuators were controlled by the Lichfield based company’s OS2 controllers, which also integrated seamlessly with the velodrome’s Building Management System. SE Controls, were able to draw on their experience as specialist contractors to supply, installed and commission their system on the project.

The velodrome’s natural ventilation system monitors temperature and CO₂ levels to maintain a comfortable environment. The system also includes ten sophisticated air handling units to maintain airflow and supplementary heating, which is used to increase the air temperatures during cooler seasons.

As there is no air conditioning used within the velodrome to cool the environment and relies solely on the advanced natural ventilation system, this has helped it achieve some outstanding energy figures, having been ranked as the most energy efficient building on the Olympic Park operating at more than 30% below the requirements of Part L of the Building Regulations.

SE Controls’ Managing Director, Will Perkins, commented: “The velodrome is one of the permanent legacy facilities of the London 2012 games and is certainly one of the most advanced sporting venues ever been created. Its form not only embodies and reflects the dynamics of high speed track cycling, but also uses a combination of innovative materials, construction methods and environmental management technologies to deliver an outstanding solution. Naturally, we’re delighted and proud to have played a part in the velodrome and it was fantastic to see so many world records broken and medals for Team GB at the venue.”

Monday 13 August 2012

SE Controls wins ‘historic’ award from The National Archive

A major project to replace and upgrade the glazed roof at The National Archive (TNA) in Kew has resulted in SE Controls’ smoke ventilation solutions being recognised within TNA’s Team Awards, which have been awarded collectively to the internal departments, external partners and contractors involved in the successful completion of the project.

The National Archive is the central repository for all UK historic and government records covering almost 10 centuries of information going back to the Domesday Book of 1085. As a result, while the safety of the building’s staff and visitors is the critical concern in the event of a fire, it is also vital that the archive is protected from damage.

By replacing the existing roof glazing, which had begun to leak in a number of places, TNA took the opportunity to improve the overall quality of the glazing, as well as bringing the smoke ventilation and actuation system up to the latest regulatory standards to ensure compliance with the relevant fire safety and building legislation.

The previous pneumatically controlled smoke vent and window automation system was replaced with a new integrated window and actuator solution, which is fully compliant to the latest EN12101-2 standard and is linked to SE Controls’ smoke and environmental control panels within the building’s eight smoke control zones.

HTP Architects designed the new glazed roof and Structura UK was the principal contractor on the project, with both companies also being part of the collective award from TNA. Throughout the project, the entire upgrading was undertaken while the building was occupied and provided full access to the public to ensure no disruption was caused.

Wednesday 27 June 2012

SE Controls provides a creative environment at new university design centre

Students at Loughborough University’s recently completed East Park Design School building are being helped in their studies by an integrated natural ventilation system from SE Controls, which ensures that carbon dioxide (CO₂) and is kept in check and indoor air quality levels are maintained.

Designed by Burwell Deakins Architects, the £14.7 million building uses informal design themes and layouts to create an ‘inspirational environment’ as well as providing practical work spaces, design studios, lecture theatres and workshops.

As with all learning environments, one of the key considerations for the design school was ensuring that levels remained within the appropriate limits to ensure that students’ abilities are not impaired by poor indoor air quality. Also, the building was conceived form the outset as a low carbon structure with minimum emissions, so utilises a range of energy efficient technologies including solar shading, insulated glazing and SE Controls’ natural ventilation solution.

The extensive natural ventilation control and actuation system was designed and installed by SE Controls to not only manage the CO₂ levels, but also ensure the temperature within the building is maintained within comfortable limits by using precise incremental control over the entire natural ventilation system.

To achieve these key goals, SE Controls installed over 400 chain actuators over the ground, first and second floors to control high level vertical vents in laboratories, offices and study areas, as well as the design school’s workshops and computer room.

Automatic louvres are also installed in ground floor public areas and meeting rooms, to allow fresh air to enter the building, while a further 48 chain and linear actuators in the building’s extensive glazed atrium vents provide ventilation to the atrium space below.

The entire system is controlled by a series of SE Controls’ OS2 networked control units and an OS2 modular panel for the atrium vents, which are seamlessly linked into the buildings BMS. This not only monitors CO₂ and temperature, but also signals the actuation of the vents and louvres to maintain the levels within the system’s upper and lower set points.

Darren Wainwright, SE Controls’ project leader on the East Park installation, explained: “The close relationship between CO₂ levels and the performance of students in schools and other educational establishments is already well documented, so it’s vital that good indoor air quality is maintained. However, it’s equally important that heat losses are minimised during ventilation to avoid unnecessary use of energy to re-heat the building, which is why the operating algorithms and ventilation strategy deployed minimise energy consumption while maintaining excellent indoor air quality and comfortable temperatures.”

Loughborough University has also been closely involved with the development of SE Controls’ new ‘NVLogiQ’ compact natural ventilation control solution through a highly active knowledge transfer partnership (KTP) programme. The ongoing relationship, which has already been in place for more than two years, has enabled SE Controls to develop advanced energy saving operating algorithms to the current design standards and accepted best practice for its new generation of controllers, of which NVLogiQ is the first.

SE Controls specialises in the design, project management installation and maintenance of advanced smoke ventilation and natural ventilation solutions to meet the needs of architects, contractors, building services engineers and facilities managers worldwide. Further information on SE Controls’ products, solutions and projects can be obtained by visiting www.secontrols.com or calling +44 (0) 1543 443060.

Thursday 24 May 2012

‘Why Automate Windows' Part 3

'Control and Contractual Process'

Will Perkins - Managing Director - SE Controls

In this series of articles by Will Perkins we look at the provision of adaptive natural ventilation for healthy and efficient buildings and the safety provision of smoke ventilation. The series attempts to explain some of the pitfalls in the lack of early design and understanding of such systems.

In this third and final part of the introduction to automating windows we look at how to control actuators in order to offer building users the most flexible and sustainable methods of achieving the ultimate goal - good air quality.

The simplest method of control is by wiring actuators up to a single on / off switch which will offer either an open or closed window condition for one or many windows wired together. A more sophisticated, but still a simple solution, is to have the windows operable on a ‘rocker’ type switch. Windows will slowly open when pushed one way, slowly close when pushed the other, and when allowed to back to its central position the windows remain at the incremental position. Whilst both these options are the most basic form of window automation, manual override switches with this functionality are often fitted to more complex installations in order to offer building users an element of control and to efficiently adapt to changing internal and external conditions

As mentioned previously, some actuators will be required to operate in case of fire for smoke ventilation. These actuators will be rated at 24 V dc and a control panel will be provided with a step down transformer from the mains which will constantly charge a 24 V battery. In case of a power outage the 24 V batteries will continue to operate the windows for safe heat and smoke evacuation keeping exit routes clear of toxic smoke.

Taking the system further and now beginning to add some ‘logic’, an adaptive natural ventilation system can be provided. The adaptive natural ventilation control strategy monitors internal and external conditions and activates the vents or windows to provide a productive and efficient learning or working environment.

There may be a need to close the windows should it start to rain. A rain sensor can be fitted to the roof and when activated can ensure windows are safely closed to stop water ingress. Further options can include seven day timers which ensure windows are always closed for security outside normal room accommodation hours, such as in offices, schools, etc. For night time cooling or early morning purge time, clocks can be utilised to ensure that the automatic opening vents operate at the optimum time.

Cost effective sensors can be installed into areas where banks of windows have been automated and these same sensors can control proportional opening of windows to finely control comfort levels of temperature and CO_2. Low levels of CO₂ have been proven to be conducive to improved levels of concentration and learning, this is particularly important in schools.

Wind direction can contribute towards an effective ventilation strategy and with a ‘weather station’ installed on the roof of a building and more complex programmable controls, algorithms can be introduced which offer the most effective solutions by using wind driven ventilation strategies to control the comfort of an internal environment. Most importantly, window automation strategies must be combined with a buildings overall heating strategy, to maximise energy savings and offer the most sustainable solution. Early appointment of a window automation and ventilation specialist is imperative if the structure is to make best use of these options.

It is common to see a ventilation strategy within a building, as explained above, that is interfaced with the fire alarm system. An entire window automation system can be linked so that it operates as a smoke ventilation system in case of a fire. Should this be the case, actuators will need to be 24 V DC instead of a directly connected to the mains power supply. Whilst sounding very complicated there are some very cost effective ways to achieve this dual function. Also important to note, is that if an automated system is linked in to a smoke control strategy, then a preventative maintenance package needs to be adopted to ensure that the life safety system can operate as designed in the case of a fire.

Occupants need to be fully aware of automated window and ventilation systems which are installed into their new or refurbished buildings - many people wish to have full control over their own working environment, it’s not always to everybody's taste! With initial education and an agreement of what constitutes a sensible working environment for all, saving in energy usage can be achieved.

Taking all the energy and ventilation resources into consideration, including areas of solar gain and wind direction, the building can be effectively modelled to show what can be achieved at various times of the day and under different changing conditions.

There are various standards that need to be adhered to ensure compliant installations; these include current building regulations and British Standards. However, new products standards are now being introduced from Europe for smoke control systems. The family of new standards fall under EN 12101 and covers ten parts of controlling smoke in a fire condition. For smoke ventilation the use of CE marked ventilators along with the requirements and testing methods are an important factor that specifications are requiring. A further important standard is EN 60335-2, which covers protection of the public where mechanical devices are present. Where mechanical automatic opening vents are operational under 2.5 metres (2.5 m from floor level) then protection against trapping is necessary. Protection may be built into the actuator or separate devices may be needed, to mitigate the potential risk.

The contractual process for installation of window automation and smoke control packages covers many on-site specialists, including the window manufacturer, installer, electrical systems, heating system, fire alarms, etc. So care in selecting a competent specialist that can offer a complete design solution all the way through to after care is crucial to getting a well-designed and integrated installation. Split packages where responsibility for different elements falls to different companies often lead to poorly designed, costly and inefficient systems.

An example of this usually resorts to the facade contractor selecting the most competitively priced actuator which meets their quality standards, but with little reference to the power that the device consumes. A single device taking 18 Watts of power may seem a small amount of power to run a single actuator, multiply this by 100 actuators and the consumption runs to 1.8 Kilowatts. Compared to a 12 Watt device the saving in power alone is 33%, but more importantly the control system will need to handle more power as a result and increase installation control panel costs.

The most cost efficient way of specifying and installing adaptive natural ventilation systems and smoke control systems is to approach a specialist who can offer a complete design package, from design through to installation and maintenance. Not only can this approach offer a balanced approach as far as the system is concerned, but by offering specialist ventilation design advice at architectural concept stage can reduce building costs and as importantly, future running costs which effects the buildings long term sustainability. Often initial budgets omit significant packages necessary to implement adaptive natural ventilation successfully, later causing poor compromise and ill feeling towards the technology. At SE Controls the complete supply chain is supported, the main areas being:

Design & Cost Planning

During early design stages SE Controls can assist the client and design team in specifying the most cost efficient and practical solution for natural ventilation, smoke ventilation and window automation.

Approval and Tendering Process

SE Controls offers coordination with the client, the approving body and bidding contractors throughout the tendering process.

• Coordination with approving body

• Production of specifications for tendering

• Planning and mid-tender meetings.

Coordination

At early stages of the project vital information is required by the contractor. AOV openings may be built into the shell and the core of the building including, walls, roofs and facades.

Commissioning Handover, Training and Optimisation

During the final completion stages of the project build phase, SE Controls will commission the ventilation system. This will typically involve detailed cause and effect testing of all the system components against the design specification. SE Controls trained commissioning engineers will then hand over the system to the client together with detailed operating instructions and training. After occupation the system can be optimised to suit client requirements.

The most important decision a specifier can make is selecting the right specialist for the project as early as possible.

SE Controls operate across the globe with offices in several continents, with specialists offering clients expert advice based on local legislative requirements. Visit the website at www.secontrols.com for further information. To discuss your requirements with SE Controls, or request literature, please call their head office in Lichfield on 01543 443060.

Friday 18 May 2012

‘Why Automate Windows' Part 2

'Window Orientation and Cabling'

Will Perkins - Managing Director - SE Controls

The process of opening windows of any orientation can be automated to provide easy access to the outside air for natural ventilation or for the provision of smoke ventilation no matter where the windows are located. There are various types of window openings currently available:

‘Hung’ on the outer frame, ‘hung’ refers to the part of the frame which is hinged allowing the vent pane to open, ‘top hung’ refers to a window which is hinged at the top, ‘top hung - open out’ suggests that the window is hinged at the top and opens outward. There are many types of arrangement using these two parameters, including ‘bottom hung - open out’ providing a hopper type window, generally used for smoke ventilation.

‘Hung’ windows can be fitted on ‘butt’ hinges to the outer frame, but more frequently are fitted on ‘variable geometry friction hinges’. These are usually made of stainless steel and are concealed in the space around the vent frame to outer frame and are actually fitted near to the ‘hung’ outer frame member, being placed on corresponding jambs. They are known as variable geometry as the hinges often move the vent frame away from the ‘hung’ outer frame once they are opened.

Centre pivot, or offset pivot windows have simple pivot points on the jambs and can rotate 180 degrees for easy cleaning. These are available in both horizontal and vertical pivot arrangements.

Both ‘hung’ and ‘pivot’ arrangements can be used in sloped facades or roofs.

Glazed or solid banks of opening louvres can also be incorporated into an effective natural and/or smoke ventilation system.

Parallel opening windows are becoming a frequent feature in modern architecture, offering a simple ‘push out’ arrangements taking the whole vent away from the facade line and offer an excellent mode of ventilation.

All these arrangements can have one or more actuators fitted to provide simple operation and security. In order to calculate the number and size of the actuators required the size and weight of the window needs to be identified, together with its material, the hinge mechanism, and what free area is needed for ventilation. Free area is the area open to allow for ventilation which needs to take into consideration cills and reveals which compromises the free area.

The Geometric Free Area (GFA) of the opening window is calculated as the leading edge of the opening vent ‘x’ the distance opening, plus the two open triangles on each side of the open vent. The GFA can never exceed the maximum opening in the outer frame, or the ‘throat’ as which air can pass. Building Regulation, Approved Document B 2007, states that the method of calculation should only include the leading edge of the opening vents by the maximum opening of the window. Here adjustments may need to be made to the calculation regarding both possible obstructions and the presence of reveals and cills.

Depending on the opening, or stoke distance of the vent to outer frame, a variable efficiency is achieved for the free area provided, this is known as the coefficient of discharge (CV). Depending on the design of the windows and the area being ventilated, this is crucial to efficient operation and the design of the window configuration that needs to be detailed at the early design stages. More importantly the provision of free area for smoke ventilation is crucial in case of fire - again early involvement of a ventilation specialist is crucial.

Once the windows are designed, actuators will need to be placed on brackets to ensure that when a window vent opens the chain actuator operates to the geometry of the opening window. It is vital that this is correctly achieved for all opening positions of the vent to ensure long life of the actuator and correct operation as specified. A poorly designed actuator fixing can cause the actuator to clash with the outer frame which may not be noticeable, but will ultimately lead to damage to the frame and failure of the actuator Early confirmation of design details will ensure that the correct parts and preparations are completed on the windows to make site fixing effective and efficient, accurate and most of all to a high standard. Cabling between the actuator and the control panels seems like a straightforward task, but not one that should be tackled without prior planning, particularly if 240v actuators are being used. If tails are going to be left are these going to run through the window material, if so are bushes required and internal preps to the windows and or curtain wall? What material, what colour of cable should be used - who is going to install and where to? So many questions - all of these need to be answered at the design stages so that a safe and efficient installed system is provided.

To meet the aesthetic requirements of the client, consideration and detailing at early design stages again is crucial. Whilst the sheathing colours of cables may not match the colours of the window system, actuators can be powder coated to match the internal finish of the window making the installation as neat as possible.

As mentioned throughout this series, one of the most important aspects in delivering a cost effective and efficient system is the early involvement of a natural ventilation and smoke control specialist. A complete installation involves many trades working side by side and one experienced specialist overviewing the whole provision.

In the next and final issue we will cover the control of the actuators and the contractual process along with covering free area calculations guidance under the new Approved Document B 2007, and how to achieve this effectively and safely.

SE Controls operate across the globe with offices in several continents, with dedicated specialists offering clients expert advice based on local legislative requirements. Visit the website at www.secontrols.com for further information. To discuss your requirements with SE Controls, or request literature, please call their head office in Lichfield on 01543 443060.

Thursday 3 May 2012

‘Why Automate Windows’ Part 1. ‘Fresh Air & Actuators’

One of the main reasons to automate windows is that of convenience. Not all windows are located at reachable height and may need a pole to operate, in some larger rooms and corridors many windows may need to be opened, so clearly an automated solution is preferable. On securing premises in the evening, automated systems can ensure all windows are closed prior to setting alarm systems. Other benefits can include ‘night time cooling’ strategies, when premises may not be occupied, and an automated solution can operate above ground windows on a time switch basis.

The integration of automated windows into a complete building management system can ensure the most efficient use of energy. Many of BREEAM excellent rated projects in the UK today use natural ventilation strategies based on window automation.

But why do we need to ventilate our buildings? According to Approved Document F and CIBSE it is mainly for health reasons offering the occupiers appropriate Indoor Air Quality (IAQ). Inadequately ventilated buildings can harbour such gases as radon, a naturally occurring gas in the earth, hydrogen sulphide, which often results from the bacterial breakdown of organic matter in the absence of oxygen, carbon monoxide, by combustion processes, dust, virus and fungal spores. The presence of any of these elements can prove to be the cause of ‘sick building syndrome’.

Today we are also much more aware of VOC’s (Volatile Organic Compounds), which have significant vapour pressures which can affect the environment and ultimately human health. In newly fitted buildings VOC’s are often present in high quantities in materials such as setting paint and new carpets, these ‘smells’ can easily be identified in the atmosphere. Whilst many are non-toxic at the levels present, VOC’s can still have chronic effects on health. Today anthropogenic VOC’s are tightly regulated, particularly in materials used indoors, but ventilation strategies can play a big part in negating the risk.

In busy buildings, body odour, an increase in moisture from breathing and build-up of CO², often leads to lethargic working or learning environments, resulting in poor working performance - this issue has been well documented in schools where an ‘appropriate indoor air quality’ is crucial to learning ability.

It is crucial that the ventilation strategy is decided at the outset of the design process. By adopting either a completely natural ventilated solution or a hybrid mixed mode solution with mechanical cooling for in only the harshest of weather conditions, can significantly reduce a buildings running costs.

So we have covered the practical reasons and the need for ventilation in our buildings today, but how do we achieve the ‘automation’?

A window ‘actuator’ is usually an electrical device which is placed on the leading edge of a window to open and close a window to various degrees as required. These come in two basic types, a ‘chain’ actuator and a ‘linear’ actuator. Chain actuators are the most compact and operate by pushing a one way folding chain out from a flush motorised housing fitted to the frame or opening light. In areas where windows are much larger, linear actuators, based on fixed ‘screw’ and motor principle may be used.

Whilst these devices may seem to be simple, window actuators do come in a very wide range of sizes and typical offer the following choice specification:

Voltage: Either in 24V DC or mains 230V AC ratings. Where smoke control is required 24V DC actuators are used so that these can be operated from an independent battery back-up in case of fire and power outage in the building.

Load: Usually indicated in amperage and is very important to consider when specifying a complete system. Often cheaper units are less efficient and require greater loads which results in an increase of control panels to operate at the higher amperage, not to mention the increased energy requirements.

Force: Indicated in Newtons (9.81 N = 1Kg) and required to open and close the window safely in all weather conditions. Referring back to efficiency, the available force within the unit should be as efficient as possible to reduce the amperage required. Some larger windows may need two actuators to perform correctly.

Stroke: This is the distance the actuator travels creating the safe opening of the window normally indicated in millimetres.

Speed: Indicated in millimetres per second. This is an important consideration in smoke ventilation situations where smoke vents must fully open with a 60 second time limit.

Size: Units vary in size depending on their specification but housings are very important to be considered when looking at the space available within the reveal, the size of the vent and the stroke required.

Intelligence: Some basic actuators rely on simple switches to limit and run the actuator motor, where occupant intervention is required. Some more sophisticated devices offer resistance feedback and information on where the actuator is within its cycle by the use of incremental volt measurement.

The most important aspect of all these variables is getting the right actuator in the right place to do the job most effectively with the minimum of maintenance. As mentioned earlier it is crucial to get a specialist involved at the very early design stages to determine the most efficient product and designs available. Leaving the choice of actuator to the lowest common denominator - cost, can have a serious detrimental impact on an installations performance and on-going maintenance requirements.

In the next article we will cover free area calculations guidance under the new Approved Document B 2007, and how to achieve this effectively and safely.

Wednesday 2 May 2012

Continued growth creates more new jobs at SE Controls

Continued growth and success at international smoke and natural ventilation solutions specialist, SE Controls, has led the company to take on a further 8 new technical and customer support staff, bringing the total of new jobs created during the past year to 21.

SE Controls’ most recent appointments cover a range of roles including business development; technical sales and key account management as well as installation engineering and project management.

The new staff are not only helping SE Controls meet growing demand for its fire safety and energy efficient ventilation solutions, but represent a significant investment in its future, which is underlined with the appointment of its fourth Trainee Project Leader in the past 12 months.

Maj Mohammed joins Faisal Amir, Ross Cameron and Sion Wilcox, who are being mentored by SE Controls’ experienced project leaders as well as studying for a BTEC level 4 HNC Diploma in construction and the built environment through the company’s in house training and development academy.

“Much of the success we’re experiencing is down to the quality of our people and their outstanding abilities in their respective areas of expertise, explained SE Controls’ Managing Director, Will Perkins. “This, in turn, has helped us grow and support our domestic and international developments, which has enabled us to create a range of new job opportunities here in the UK.”

He added: “We have a very clear focus on the future of our business and our business development plans demand continued investment in high quality people to ensure we have the right people in place to maintain our high standards of design, technical and project management as well as supporting our increasing focus on customer service, support and quality.”

SE Controls is already in the process of seeking the next Trainee Project Leaders to join its team and the company’s latest recruitment and career opportunities are always posted in the ‘Careers’ section of its website, which can be found at www.secontrols.com.

Monday 23 April 2012

SE Controls sponsor the Peter Wilson Lecture

SE Controls is proud to be associated with the Manchester School of Architecture in its sponsorship of the forthcoming Peter Wilson Lecture and drinks reception.

The event is being organised by the Consumed Symposium Team of MA Architecture and Urbanism students at the Manchester School of Architecture and is being held at the CUBE Gallery in Manchester on Thursday 26^th April 2012.

Peter Wilson of BOLLES + WILSON, will be delivering an open lecture to professionals from the built environment, as well as academics and students.

BOLLES + WILSON Architects are internationally known for a consistently high architectural quality in a wide range of projects, each with an individual solution developed with careful consideration to the cultural and urbanistic context whilst addressing the key issues of sustainability.

It is SE Controls’ experience that despite the willingness within the construction industry to promote systems, products and services that are claimed to be ‘sustainable’ one thing is clear, a complete package aimed at getting the best performance possible is crucial in choosing a partner for smoke ventilation and natural ventilation.

SE Controls have 30 years’ experience in providing turnkey solutions to the construction industry and pride themselves as being one of the most influential smoke and natural ventilation companies in the UK.

Thursday 22 March 2012

SE Controls publishes new ‘white paper’ on smoke control in apartment buildings

A new ‘white paper’ exploring the effective design and installation of smoke ventilation systems in apartments has been developed by leading smoke and natural ventilation specialist, SE Controls, which builds on the recent guidance published the Smoke Control Association (SCA).

The comprehensive SCA report entitled ‘Guidance on smoke control to common escape routes in apartment buildings, flats and maisonettes’ was created to not only highlight the objectives and performance criteria of residential systems, but also identify system options, testing and the integration of smoke control with other fire systems.

By publishing its white paper, SE Controls sets out to communicate a number of key critical aspects covered in the SCA report into a more condensed guidance document focusing on smoke ventilation system design, particularly where a standard ‘Approved Document ‘B’ compliant solution may not be possible.

The white paper also recognises the changing legislation and legal obligations on property owners to ensure adequate smoke control and escape provision is made and it is kept well maintained. It also goes beyond the need for safe means of escape and deals with the need for fire fighting teams to access the building safely to attend possible victims and extinguish the fire.

Will Perkins, SE Controls’ Managing Director was part of the SCA group that compiled the original guidance document and is committed to ensuring that effective smoke control is firmly on the building safety agenda. He said: “It’s a well documented fact that asphyxiation from smoke accounts for 80% of all deaths in the event of a fire, yet in multi storey apartments, where escape routes could be inaccessible due to ineffective smoke control, this figure could be disproportionately high. Ultimately the single primary objective of our white paper and the original SCA guidance is to help save lives through understanding the risks and implementing effective solutions to control smoke and aid escape.”

SE Controls (www.secontrols.com) specialises in the design, project management and installation of advanced smoke ventilation and natural ventilation solutions to meet the needs of architects, contractors, building services engineers and facilities managers.

Monday 12 March 2012

Focus on waste management and recycling pays off for SE Controls

An ongoing programme of effective waste reduction, management and recycling by Staffordshire based smoke control and natural ventilation solutions specialist, SE Controls, has enabled the company to ensure that none of its waste goes to landfill sites.

Since mid 2008, SE Controls has partnered with commercial waste management and recycling business, Briers, to not only reduce the level of waste it produces, but to also improve the efficiency while increasing the proportion of waste material that could be recycled.

In addition to metals, plastic, paper and cardboard waste produced by the company from its day to day operations, a proportion of the SE Controls waste is made up of electronic components and equipment, which is managed in compliance with WEEE regulations.

Mark Soleil, SE Controls’ operations Director, explained: “All businesses have an obligation to meet the minimum standards for waste management, but at SE Controls, we’re always looking to reduce our waste material and its impact on the environment, as well as reducing our packaging waste costs.”

He added: “Our partnership with Briers has proven to be highly productive and we have worked together closely. Their high quality recycling solutions coupled with our focus on reducing scrap and waste has enabled us to achieve our present situation where no waste from our UK operations is sent to landfill.”

SE Controls presents latest smoke control technology at the LABC Conference & Exhibition

The annual Local Authority Building Control (LABC) Conference and Exhibition takes place on 13^th to 15^th March 2012 and SE Controls will be taking part as one of the key exhibitors at this important event for LABC members and clients.

Throughout the event, SE Controls will be displaying products and solutions from its extensive smoke ventilation range, including the SHEVTEC® Extended Travel Distance System, which recently received full Registered Detail Certification from the LABC.

Held at the Copthorne Hotel in Merry Hill, Dudley, the first of the event’s three days is dedicated purely to LABC clients, where businesses have the opportunity to discuss changes to the building regulations and offer their opinions, following presentations from the LABC and the Department for Communities and Local Government (DCLG).

The remaining two days are for LABC members only and provide detailed discussion and debate on key issues surrounding building control enforcement and building regulations, as well as a full workshops programme on both days.

SE Controls Managing Director, Will Perkins, commented: “The LABC plays a vital role in maintaining and improving standards to ensure building design, construction and environmental efficiency are compliant with the relevant codes. The conference provides an excellent opportunity to discuss the current issues as well as enabling delegates to see and experience what SE Controls has to offer in terms of products, solutions and expertise.”