Positive Input Ventilation (PIV) units includes a variety of high performance systems designed to introduce filtered fresh air into homes. These systems reduce condensation, damp, and mould, improving indoor air quality in lofts, hallways, flats, or homes without loft space. You’ll find both loft-mounted PIV units and wall-mounted positive pressure ventilation units, some with integral heaters or NOX filtration, for year-round comfort.
Here are the types of products available in this category:
- PIV systems with heater – units with built-in heating elements that help supply warm fresh air during colder months.
- Standard PIV units – base systems without heater, for mild climates or where heating is provided separately.
- Loft-mounted PIV fan systems – designed to be installed in roof voids to ventilate whole houses or bungalows efficiently.
- Wall-mounted PIV units – ideal for flats or homes where loft installation is not possible.
- Units with advanced filtration such as NOX filter kits or wired hall diffusers to improve air quality and ease of control.
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