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What is Positive Input Ventilation?

Is a Positive Input Ventilation (P.I.V.) unit the solution to your damp and condensation issue?

Invented back in 1972 a loft mounted P.I.V. unit creates a healthy damp free environment by pumping and circulating fresh filtered air into your home and forcing stale air out of the gaps and cracks in the fabric of the building.

P.I.V's are currently installed in over 1 million UK homes.


What is Positive Input Ventilation?

Positive Input Ventilation Explained

Positive Input Ventilation (PIV) systems have gained popularity in recent years for their ability to improve air quality and reduce issues like condensation and dampness.

In this video we'll look at how Positive Input Ventilation systems work and whether they’re right for your home


How PIV Units Work

  • Air Input: The PIV unit typically draws fresh air from the outside or loft space (if clean and ventilated) into the home.
  • Filtration: The incoming air is filtered to remove dust, pollen, and other contaminants.
  • Positive Pressure: The unit gently pushes this filtered air into the living spaces. This creates a slight positive pressure within the home.
  • Moisture and Pollutant Removal: The positive pressure forces stale, moist, and polluted air out of the property through gaps, vents, or natural leakage points.

How PIV Helps Reduce Damp

PIV units are particularly effective in reducing condensation damp, which occurs when warm, moist air inside the house comes into contact with cold surfaces (e.g., windows or walls). Here's how:

  • Humidity Control: By continuously introducing fresh, dry air and reducing humidity levels, PIV units limit the conditions where condensation forms.
  • Improved Air Circulation: Constant airflow helps prevent stagnant air pockets where moisture can accumulate.
  • Mold Prevention: Lower humidity levels reduce the risk of mold growth, which thrives in damp environments.

Eradicated that damp with a Positive Input Ventilation Unit... Call 0161 850 6006
0161 850 6006