Positive Input Ventilation (PIV) Units – Fresh Air, Better Indoor Environment

Installing a positive input ventilation (PIV) unit is a smart way to improve indoor air quality while helping reduce issues like dampness and condensation—especially in UK homes prone to poor air circulation. These systems gently introduce filtered, fresh air into upper areas of a house, creating a subtle, continuous flow that pushes moist, stale air out through natural leak paths.

Designed for quiet, year-round operation, PIV units work efficiently without disrupting daily life. They’re an excellent solution for improving ventilation in bedrooms, living spaces, and loft areas, particularly in well-insulated buildings where natural airflow may be limited. The controlled fresh air flow helps balance indoor humidity, discourages mould growth, and supports a healthier breathing environment.

Maintenance is straightforward: most models include washable filters and accessible vents. Over time, consistent air turnover can reduce reliance on intense heating, promoting energy savings and improving occupant comfort. While upfront installation requires some planning, the resulting benefits—drier walls, fresher air, and reduced cleaning needs—make PIV systems a valuable long-term investment.

Explore our selection to find a PIV unit suited to your home’s size and layout, making year-round comfort and air quality easier to achieve.