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heating, ventilation & services
‘A major benefit of the air rotation heating approach is that it is able to provide excellent temperature control (typically no more than +/-1.5°C of the set point) irrespective of the layout of the space’
with independent verification of low air permeability, weather tightness and wind resistance to maximise energy efficiency. The design of the ventilator should also include thermal breaks to prevent cold-bridging, as well as the use of durable materials. These materials should be from a sustainable source, recyclable at the end of life and be manufactured using sustainable processes. There are additional sustainability benefits to sourcing from a UK manufacturer, as this reduces the overall embedded carbon of the project. Local manufacture also enables a more flexible and responsive approach with the ability to manufacture standard and bespoke sizes to suit each project’s requirements and construction schedules.
Air rotation heating
In the majority of buildings, once the heating system has been designed and installed there is relatively little change to its con- figuration. However, this is not the case with many ‘shed-type’ buildings such as warehouses, factories and some retail outlets. In these situations the building operator may have a require- ment to occasionally – or even frequently – change the layout of the space and if this results in a need to reconfigure the heating system it can prove to be an expensive exercise. In these circumstances it makes sense to opt for a heating
design that does not impose such constraints on the building layout. It was in addressing this challenge that a new technology called air rotation heating was developed – initially in the USA but now gaining popularity in the UK. Air rotation heating works by using high efficiency axial fans
to move large volumes of air at relatively low temperatures and velocities through the space with minimum energy consump- tion, while low temperature operation helps to maximise condensing for further energy savings. A major benefit of the air rotation heating approach is that
it is able to provide excellent temperature control (typically no more than +/-1.5°C of the set point) irrespective of the layout of the space. This also means that any re-configuration of the space does not impact on the heating or require the heating system to be redesigned, as might be the case with fixed systems.
Meeting the challenges
For all of these reasons, there is a strong incentive for architects to give careful consideration to ventilation and heating as a key part of the design process, potentially working closely with other disciplines and specialist suppliers to arrive at the best solution for the end client.
enq.208
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