Home ventilation, Dumfries and Galloway
Positive input ventilation (PIV) in Dumfries and Galloway
Loft or wall units that gently push filtered air into the home to tackle condensation, across Dumfries and Galloway.
- From £775 inc VAT per home
- Free survey
PIV is often a good fix for Dumfries and Galloway homes with condensation on every window.
Every job in Dumfries and Galloway gets a written quote before it starts and a commissioning record when it finishes. We cover Dumfries and Stranraer and the villages around them.
PIV in Dumfries and Galloway at a glance
- Area
- Dumfries and Galloway, Scotland
- Towns listed
- 2, largest Dumfries
- Postcode districts
- DG1, DG2 and DG9
- Price region
- Scotland
- Survey
- Free survey (UK mainland)
What positive input ventilation (PIV) 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. It does not replace extract fans: kitchens and bathrooms still need their own extract to remove steam at source.
PIV with fan upgrades
PIV plus humidity-controlled extract fans in the kitchen and bathroom for the most stubborn condensation.
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 and Galloway
| 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
- 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 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.
How the job runs
- Survey
- Fixed quote
- Install
- Set up
- Hand over
Towns we cover in Dumfries and Galloway
Questions about positive input ventilation (PIV) in Dumfries and Galloway
Which towns in Dumfries and Galloway do you cover?
All of Dumfries and Galloway, including Dumfries and Stranraer. If your town is not listed, send the postcode and we will confirm.
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.
Can PIV be fitted in a flat?
Yes. Flats without loft space use a wall-mounted PIV unit that draws air from outside through an outside wall.
Are prices different in Dumfries and Galloway?
Our guide prices are adjusted by region. In Dumfries and Galloway we use Scotland rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £775 to £1,350 inc VAT per home.
Is the survey free in Dumfries and Galloway?
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 and Galloway survey and we will say honestly whether PIV, extract fans or both are needed.
Other services in Dumfries and Galloway
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.