Interesting article over at the Industry Today website regarding air pressure testing and the reduction of heat loss. This is something that can really have an impact on the performance and effectiveness of your Heat Recovery Ventilation (HRV) system. Such a simple test can yield big improvements:

"typically all it requires is a little more attention to detail and some targeted sealing. Yet, as underlined by the research, the benefits are lasting, substantial and escalating with the price of fuel".

On average improved air tightness can reduce the space heating load during the heating season by around a third...