Homevent Loft Unit for reduction in condensation

The Homevent Positive Input Ventilation System is an energy efficient method of displacing stale contaminated air and replacing it with fresh filtered air. Fresh air is drawn from outside via the loft space through a filter on the unit and delivered into a central location in your home.

This displaces vapour-laden air, which lowers humidity levels, cures condensation and eradicates mould.


  • Reduces/eliminates surface condensation
  • Quiet operation
  • Eliminates mould
  • Stops streaming windows
  • Removes musty odours
  • Improves air quality
  • Can reduce heating costs
  • Takes advantage of the benefits of solar gain
  • Benefits asthma sufferers
  • BBA approved

The Homevent unit runs continuously except when the loft temperature rises above 25°C when the unit will switch off. This is as the hot incoming air would be uncomfortable. When the air temperature falls below 25°C, the unit will switch back on.


To help keep your home condensation free:

  • Do not dry clothes over any radiators.
  • Vent your tumble dryer outside.
  • Try not to use Paraffin/Calour gas type heating.

To improve the comfort of the incoming air there is an integral “intelligent low temperature” comfort heater* in the unit.

*This feature employs a sensor, which monitors the incoming air temperature and ensures that when the external temperature drops, the incoming air temperature does not fall below 10ºC.

Controlled by an enable / disable switch located in a convenient position within the property. This energy-efficient heater uses around 7 pence per day. This figure can be further reduced with prudent use, by disabling when the house is empty or other non-critical times.

This preventative measure is better than conducting remedial works to remove the damp. Landlords have a duty under Section 11 of the Landlords and Tenants Act 1985 to ensure properties do not have any mould. The PIV units are a great way to prevent condensation which in turn can lead to mould.

This product is available on https://l-a-b-s.co.uk/product/positive-air-vents-heat-recovery-units/.