Positive Input Ventilation Explained: Pros, Cons, Costs and More

a positive input ventilation unit installed in a loft
Nuaire's Drimaster-Eco is the brand's latest Positive Input Ventilation system (Image credit: Nuaire)

Positive Input Ventilation (PIV) was developed in 1972 by Nuaire to specifically tackle the ventilation issues in existing properties. It's easy-to-install nature makes it a good choice for these homes, as it doesn't require the more complex ducting installation of a Mechanical Ventilation system, for example. 

If your home is suffering with issues such as condensation, damp and mould, installing a PIV unit could be a huge help. Find out if it's right for your property with this guide. 

Hugh Metcalf

Hugh is editor of sister title Livingetc.com and former digital editor of homebuilding.co.uk. He has worked on a range of home, design and property magazines, including Grand Designs, Essential Kitchens, Bathrooms, Bedrooms and Good Homes. Hugh has developed a passion for modern architecture and green homes, and moonlights as an interior designer, having designed and managed projects ranging from single rooms to whole house renovations and large extensions. He's currently renovating his own Victorian terrace in Essex, DIYing as much of the work as possible. He's recently finished his kitchen renovation, which involved knocking through walls, and landscaping a courtyard garden, and is currently working on a bathroom renovation.