Positive Input Ventilation (PIV)

PIV is a highly effective an energy efficient method of ventilating your home. Invented by Nuaire in 1972, the technology is now installed in over a million homes. Positive Input Ventilation (PIV) principle, which introduces filtered air into the dwelling at a continuous rate, encouraging movement of air from inside to outside.

PIV units are used for a few different reasons; they are an effective an energy efficient method of ventilating your home, creating fresh indoor air quality,

PIV systems are built to displace the air of indoor pollutants, including stagnant and humid air, help to eradicate condensation dampness and mould.

The installation of PIV units is generally recommended if you’re not looking to carry out a full renovation of your home yet require ventilation throughout the dwelling without removing any walls.

The unit is easily fitted into the loft and out of the way. It is an ideal option for retrofit projects as it does not need any form of ducting or holes being made in the walls. For heated units there is a built-in 400-watt heater can also help reduce energy costs by heating the air drawn into the unit.

The Flatmaster solution has been specifically designed to ventilate homes without loft space. It is often used in basements, cellars, flats and aparments. Just like the Drimaster heat range the flatmaster range has a heated unit. 

Condesation affects both new and older properties and is much more common than you might imagine. Excess moisture is produced simply by breathing and by everyday activities like bathing, cooking, washing and drying our clothes. An average family can produce up to four pints of water per day, and this moisture is absorbed into the air, where it migrates through the home and condenses on cool surfaces such as windows, mirrors, wall tiles and furniture.

Eventually, this humid air is forced out of natural leakage points throughout the home – such as windows, under doors or even through keyholes wich prevents the build up of condensation dampness. By using a PIV system, the air is constantly moving, humid air cannot settle on cold surfaces, such as windows or outer walls, meaning it cannot condensate.

Our Drimaster-Eco range takes existing PIV technology a step further, effectively tackling the problem of condensation dampness whilst using up to 20% less energy than other competitors, meaning lower running costs and life cycle costs.

The Drimaster-Eco range has swapped its casing from a virgin ABS plastic to 100% recycled plastic. The switch will result in a reduction of 167 tons of equivalent embodied carbon over the period of a year.

Nuaire are part of the Genuit Group, which has pledged to be net zero by 2050, Nuaire has set rigorous carbon reduction targets and, in 2024 alone, removed 2,000 tons of carbon from its product portfolio.

We recommend that your PIV system be installed by a trained professional.

For loft mounted units, your loft space will need to be adequately ventilated, that party walls are intact, and that any ceiling holes are sealed, and extract fans are discharging to the outside and not into the loft.

Our simple video guide provides step-by-step instructions for how to install our low-energy Drimaster Eco system quickly and successfully. This video is featured on our Drimaster product pages.