Shepton Mallet, Somerset
Positive input ventilation (PIV) in Shepton Mallet
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Shepton Mallet and BA4 and BA5.
- From £825 inc VAT per home
- Free survey

PIV is often a good fix for Shepton Mallet homes with condensation on every window.
For positive input ventilation (PIV) in Shepton Mallet, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.
PIV in Shepton Mallet at a glance
- Town
- Shepton Mallet, Somerset
- Postcode districts
- BA4 and BA5
- Nearby
- Wells (5 miles), Midsomer Norton (7 miles) and Street (10 miles)
- Price region
- South West
- Survey
- Free survey (UK mainland)
PIV for Shepton Mallet homes
It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source. On survey we check the loft, the landing position and the existing fans, and we tell you if PIV is not the right answer.
Wall-mounted PIV for flats
Draws air from outside through an outside wall. Suits flats and homes with no loft space.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
Guide prices in Shepton Mallet
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £825–£1,450 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,025–£1,775 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £150–£305 inc VAT |
South West rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.
Signs it is time to call us
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
Rules that apply in England
In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.
Questions from Shepton Mallet
What area around Shepton Mallet do you work in?
All of Somerset. Near Shepton Mallet that includes Wells, Midsomer Norton, Street and Frome.
How much does PIV cost to run?
A standard PIV unit uses very little electricity, comparable to a low-energy light bulb on normal speed. A heated unit costs more in cold spells because the heater switches on when loft air is cold.
Will PIV make my house cold?
Most units temper or reduce the flow when the incoming air is cold, and a heated unit warms it. Placed correctly on the landing, the air spreads gently rather than blowing on anyone.
Do you cover Shepton Mallet and nearby?
Yes. We cover Shepton Mallet and nearby places including Wells, Midsomer Norton, Street and Frome. Send your postcode and we will confirm.
What is the price of a PIV unit in Shepton Mallet?
Guide prices for Shepton Mallet use South West rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £825 to £1,450 inc VAT per home. We confirm a fixed price in writing before any work starts.
Send a photo of your loft hatch area and landing ceiling for a quicker Shepton Mallet quote.
PIV near Shepton Mallet
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Answer a few questions for a price range, or send photos and we will come back to you with a written quote.