Publications

fourwalls were part of the project team for this study, led by the Zero Carbon Hub. The study team visited 33 dwellings across 6 construction sites in 2015 to see how effectively their mechanical ventilation systems were designed, installed, commissioned and handed over to occupants. In summary, we found things going wrong at multiple stages of the construction process at every site. The cumulative effect of these issues ultimately outweighed any good practice, as the systems we tested showed significant under-performance. At 5 of the 6 sites, fans were operating at only half the required duty or lower, i.e. flow…

A long time in the making, but we are pleased to announce that the MVHR meta study has now been published. The meta-study was commissioned by Innovate UK as part of the Building Performance Evaluation (BPE) Programme to provide an overview of the performance and use of whole-house heat recovery ventilation (MVHR) systems in domestic projects. With increasing requirements for energy reduction, the impact of ventilation strategies has increased in importance, both in terms of energy reduction and indoor air quality (IAQ). The primary aims of this meta-study are to: Review the characteristics of installed systems in relation to air…