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MVHR: YOUR TOP 10 questions answered

Mechanical ventilation and heat recovery (MVHR) systems are recommended for efficient new homes, but how do they work and why are they needed? Here we’ve spoken to leading industry experts to answer your queries
In this installation by Green Building Store, the MVHR unit is hidden away in a kitchen cupboard and the ducting is left on display as an attractive contemporary design feature

1 How does mechanical ventilation and heat recovery tech work?

Wendy: MVHR offers year-round, whole home ventilation that removes stale air, condensation and pollutants, whilst recovering heat that you can pump back inside. Moistureladen air is extracted from wet areas, such as kitchens and bathrooms. The warmth from this is recovered via a heat exchanger, passed onto a new filtered supply and put into the rooms in your property, creating a healthier living environment for the household. It significantly improves the indoor air quality and reduces energy usage.

Clarissa: It means you recover up to 95% of the heat you would otherwise lose, perhaps saving a third on heating bills and your lungs the trouble of filtering pollutants.

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December 2018
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About Build It

Build It is Britain’s longest running self build magazine. Each issue is packed full of inspirational and informative readers’ homes, as well as expert advice on issues from budgets and planning to project management and design. This month: - Build It's Self Build Education House - Cladding a timber frame home - Renovating a bungalow - Myth buster: Renewable Tech