Humidity controlled extractor fans
A lot of bathroom and kitchen fans are too weak, switched off, or only run while the light is on. We fit quiet fans that either run continuously at a low speed or boost automatically when humidity rises. That one change clears most bathroom ceiling mould for good.
Positive input ventilation (PIV)
A PIV unit sits in the loft (or in a cupboard for flats) and gently pushes filtered fresh air into the home. That pushes moist air out through the natural gaps in the building and lowers humidity throughout. It works well in houses and top floor flats with whole home condensation and mould on several walls.
Which one do you need?
| Problem | Usually best fix |
|---|---|
| Mould only in the bathroom | Humidity controlled extractor fan |
| Steamy kitchen, grease and mould near the cooker | Kitchen extractor ducted outside |
| Streaming windows and mould in several rooms | PIV unit plus fans in wet rooms |
| Ground floor flat with no loft | Wall mounted PIV or continuous extract fans |
Prices
from £180Extractor fan into existing duct
£280 to £450New fan with new ducting through the wall
£650 to £950Loft PIV unit fitted
No VAT added. Electrical work is carried out by a qualified electrician and certified where required.
Questions people ask
Does a PIV unit make the house cold?
Modern PIV units have a heater or temper the air, and you mostly will not notice the airflow. Many people find the home feels fresher rather than colder.
How much does a PIV unit cost to run?
The fan itself uses very little power, similar to a low energy light bulb. Units with a heater use more in the coldest weeks.