Dumfries, Dumfries and Galloway
Positive input ventilation (PIV) in Dumfries
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Dumfries and DG1 and DG2.
- From £775 inc VAT per home
- Free survey
Condensation in Dumfries homes usually has one of two answers: better extract fans, or PIV as well.
Customers in Dumfries can get a guide price online in a couple of minutes. It uses Scotland rates, which is what we would charge for the same job anywhere in Dumfries and Galloway. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Dumfries at a glance
- Town
- Dumfries, Dumfries and Galloway
- Postcode districts
- DG1 and DG2
- Price region
- Scotland
- Survey
- Free survey (UK mainland)
What the work involves
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.
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.
Guide prices in Dumfries
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £775–£1,350 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £950–£1,625 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £140–£285 inc VAT |
Guide prices using Scotland rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
When to get it looked at
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
Rules that apply in Scotland
In Scotland, ventilation is covered by the Building (Scotland) Regulations and section 3 of the Technical Handbooks, and most building work needs a building warrant first. Extract and whole-home rates are designed to the Scottish standards and measured at handover.
Questions from Dumfries
Do you cover Dumfries and nearby?
Yes. We cover Dumfries and the surrounding area. Send your postcode and we will confirm.
Does PIV really stop condensation?
PIV reduces condensation in most homes because it dilutes moist air and keeps it moving, but it works best alongside working extract fans in the kitchen and bathroom. Leaks, rising damp or a cold bridge need fixing separately.
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.
What is the price of a PIV unit in Dumfries?
Guide prices for Dumfries use Scotland rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £775 to £1,350 inc VAT per home. We confirm a fixed price in writing before any work starts.
Is the survey free in Dumfries?
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.
Book a free Dumfries survey and we will say honestly whether PIV, extract fans or both are needed.
More services in Dumfries
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.