Positive Input Ventilation PIV

Positive Input Ventilation is the most effective method of curing and preventing condensation dampness.
Installed in over 1 million homes, PIV is the UK’s most popular method of low-energy, whole-home ventilation.

Invented by Nuaire in the 1970s, this enduring ventilation strategy has since become an industry staple. Nuaire’s market-leading Drimaster PIV range is trusted by social housing providers, new build developers and private landlords as a cost-effective, whole-house system that prevents condensation and black mould from damaging homes and the health of occupants.

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How Positive Input Ventilation PIV Works

In 1972, Nuaire invented a cure for condensation dampness in residential properties and its associated problems. Nearly 50 years later, Nuaire’s innovative strategy - Positive Input Ventilation (PIV) - is the UK’s most popular method of low-energy whole home ventilation. 

Nuaire’s market- leading Drimaster-Eco range is designed for 2 and 3 storey homes with lofts, while the Flatmaster is designed for flats, apartments and basements. Both ranges are quick, cost-effective and easy to install and maintain, making them an ideal solution for both new build and retro-fit applications.

PIV is a fit-and-forget technology that requires minimal energy to run and minimum effort to maintain. The PIV strategy, also known as an Alternative System within Part F of building regulations, works by gently introducing fresh, filtered air into the dwelling ensuring that old, contaminated moisture laden air is continuously diluted, displaced and replaced with good quality air. The result is improved air quality and a healthy living environment in which condensation cannot exist.

Both Drimaster-Eco and Flatmaster PIV ranges are quick, cost-effective and easy to install, making them an ideal solution for both new build and retrofit applications.

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Ideal for Repairs and Maintenance

Without adequate ventilation, the moisture produced by washing, cooking and bathing remains trapped inside. Modern lifestyles, energy-efficiency measures such as wall and loft insulation, and the rise in energy prices all contribute to the problem. Added to this indoor pollutants such as burning fuel, using cleaning and beauty products create an environment that can be harmful to our health. The Drimaster-Eco range provides a long-term solution that is easy to install in existing homes and uses very little energy.

Cost-effective Ventilation for New Build Projects

Positive Input Ventilation is a popular method of ventilating new build homes. This ventilation strategy is supported by a BBA certificate and recognised as an alternative method within building regulations. The Drimaster-Eco range is an extremely cost effective ventilation solution that offers unique benefits when installing and commission the units. PIV is also recognised as a method of reducing harmful levels of radon gas levels in affected areas. 

Read our Lovell Housebuilder and Dri-Eco Case Study here


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How to Install Your Drimaster-Eco System


The Drimaster-Eco Positive Input Ventilation (PIV) system from Nuaire will cure your condensation dampness problems and improve your indoor air quality (IAQ). Follow our simple video guide and install your low-energy Drimaster Eco system quickly and successfully.

Your Drimaster-Eco PIV system is designed to be mounted in the loft space where it draws fresh air through the G4 grade filters, and inputs it at ceiling level into the home. Positive Pressurisation is the most effective method of retrofit whole-home ventilation and is a tried and trusted cure for condensation dampness. The principle introduces a constant flow of fresh, filtered air into the home, which lowers humidity levels and so prevents streaming windows and black mould patches from forming. It creates a dry, allergen-free environment that is great for asthma and allergy-sufferers. The G4 grade filters are fine enough to prevent pollen entering the home - good news for hay fever sufferers.

The Nuaire Drimaster Eco heat model has all the controls for the fan in the ceiling diffuser, so you can commission and adjust the settings without having to enter the loft. A 400w low-energy heater tempers the air delivered into your home. Electrically-controlled, it minimises energy-use. The Drimaster Eco features handy wireless controls and sensors which respond to changing humidity and CO2 levels, to ensure the best indoor air quality, and to help you save energy.

Nuaire Academy - Training and Support For You and Your Team

We're In It Together! 

Our team at Nuaire are here to help and support you throughout your project, from meeting regulations to avoiding damp disrepair claims. Our products cure and prevent condensation, but we offer more than that. We can help you with:

  • Condensation Solutions

  • Being Compliance With Regulations

  • Avoiding Damp & Disrepair Claims

We have a team of experienced sales representatives who can delivered tailored CPD training workshops to support your DLOs, installers and surveyors. We also offer full training which is NICEIC accredited.

CLICK HERE to find out how we can help you this winter!



Positive Input Ventilation Noxmaster


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Positive Input Ventilation - DRI-ECO-HC


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PIV - DRI-365


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PIV - Flatmaster


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PIV Flatmaster 2000

Flatmaster 2000

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