Home ventilation, Bristol
Positive input ventilation (PIV) in Bristol
Loft or wall units that gently push filtered air into the home to tackle condensation, across Bristol.
- From £825 inc VAT per home
- Free survey
We fit loft and wall-mounted PIV units across Bristol, after checking the house first.
Every job in Bristol gets a written quote before it starts and a commissioning record when it finishes. We cover Bristol and the villages around them.
PIV in Bristol at a glance
- Area
- Bristol
- Towns listed
- 1, largest Bristol
- Postcode districts
- BS1 and BS10
- Price region
- South West
- Survey
- Free survey (UK mainland)
How we do it
Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole. PIV works well in houses and flats with general condensation on windows and cold walls. It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Heated PIV
A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.
Wall-mounted PIV for flats
Draws air from outside through an outside wall. Suits flats and homes with no loft space.
Guide prices in Bristol
| 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.
Common reasons people call
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
- You have no loft but still need whole-flat ventilation (wall unit)
Rules 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.
How the job runs
- Survey
- Fixed quote
- Install
- Set up
- Hand over
Towns we cover in Bristol
Questions about positive input ventilation (PIV) in Bristol
Are prices different in Bristol?
Our guide prices are adjusted by region. In Bristol we use South West rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £825 to £1,450 inc VAT per home.
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.
Is the survey free in Bristol?
For new installations on the UK mainland, yes. The survey is free and the quote that follows is fixed and in writing. Servicing, testing and repair visits are charged, and we confirm the cost before booking.
Which rules apply to ventilation in Bristol?
In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.
Book a free Bristol survey and we will say honestly whether PIV, extract fans or both are needed.
Other services in Bristol
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.