Heating, Ventilation & Services
Air Quality Feature
The average family of four produces about 15 litres of moisture each day from activities such as bathing, cooking, washing and breathing
the go-to ventilation solution. However, the installation of these systems does require careful design and planning due to the spaghetti of ducting required to interconnect all rooms. For this reason, they are normally seen as too costly and disruptive for renovations and only considered for new build projects. Decentralised whole-house heat recovery ventilation is less understood but
offers some significant benefits over its centralised cousin, making it a real viable solution for refurbishment projects. As each unit is self-contained there is no need for a loſt-mounted centrally managed ventilation device and the associated costly and time-consuming ducting. Once the wall opening is prepared, the installation of each ventilation unit is completed in less than one hour. Tese single-room heat recovery units run continuously and automatically
switch between air extract and supply in around minute intervals. When running in extract, warmed stale air from the room is extracted and heat is collected in the heat exchanger. Te cycle then changes and the unit switches to air supply drawing in fresh air from outside and transferring the captured heat to the incoming clean air supply to raise the fresh air temperature before entering the room. Using heat recovery units as opposed to conventional fans or trickle vents reduces heat losses significantly, with some units, such as SiegeniaI’s Aerotube WRG, recovering as much as 90% of the heat. Single-room ventilation units also provide a constant supply of fresh air to help maintain a healthy home environment. It is therefore sensible to consider decentralised systems as a credible
alternative to both centralised systems and trickle vents, when looking to renovate your housing to meet ventilation standards.
Richard Poole is head of ventilation sales at Siegenia
46 | HMMAugust/September 2022 |
www.housingmmonline.co.uk
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