What is a PIV Unit?

PIV is an abbreviation of Positive Input Ventilation and a PIV unit blows ‘clean’ filtered air into your home. The clean air that flows into your home, via a filter within the unit, raises the air pressure within your house, dilutes and reduces the relative humidity levels and gently forcing out stale air.

Units tend to be fitted in a central landing area or just above the stairs so that their effect can be felt throughout the property.

Why have a PIV unit fitted?

• PIV units help prevent build up of condensation.
• The unit filters the air, so dust, pollen and many pollutants are removed, thus improving air quality.
• Musty and stale smells are significantly reduced or completely removed.
• One unit will help with ventilation throughout an average sized property.
• Units are economical and tend to draw between 1.5 – 15 watts.
• They are unobtrusive and very quiet, even on higher settings.
• You don’t need to turn the unit on and off as it self-regulates.

Do PIV units affect your property temperature?

Although PIV units can potentially lower the temperature within your property, many units come with a thermostatically controlled heating options so that fresh air can be gently warmed as it enters the property.

Can I have a PIV unit fitted even if I don’t have a loft?

As PIV units have continued to grow in popularity the types of designs and applications have also grown. There are now PIV units designed to fit into flats and properties without a loft space.

What PIV units do we recommend at PTL?

Our recommendations are always based on individual property requirements and there are different types of PIV units that you may see us recommend. Two of the most commonly installed units are the Dri-Eco-Heat and Flatmaster units, manufactured by Nuaire.