Home ventilation, Forth Valley
Positive input ventilation (PIV) in the Forth Valley
Loft or wall units that gently push filtered air into the home to tackle condensation, across the Forth Valley.
- From £775 inc VAT per home
- Free survey
If your Forth Valley flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
Every job in the Forth Valley gets a written quote before it starts and a commissioning record when it finishes. We cover Alloa, Grangemouth, Bo’ness, Stirling and Falkirk and the villages around them.
PIV in the Forth Valley at a glance
- Area
- Forth Valley, Scotland
- Towns listed
- 5, largest Stirling
- Postcode districts
- FK2, EH49, EH51, FK7, FK9 and FK1
- Price region
- Scotland
- Survey
- Free survey (UK mainland)
What positive input ventilation (PIV) involves
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. On survey we check the loft, the landing position and the existing fans, and we tell you if PIV is not the right answer.
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 the Forth Valley
| 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
- 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 Scotland
Scottish projects follow the Technical Handbooks (section 3, Environment) under the Building (Scotland) Regulations, usually with a building warrant. We work to the Scottish ventilation standards and record the airflow achieved.
How the job runs
- Survey
- Fixed quote
- Install
- Set up
- Hand over
Towns we cover in the Forth Valley
Questions about positive input ventilation (PIV) in the Forth Valley
Which rules apply to ventilation in the Forth Valley?
In Scotland, ventilation is covered by section 3 of the Building Standards Technical Handbooks. Private rented homes must meet the Repairing Standard, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.
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.
Which towns in the Forth Valley do you cover?
All of the Forth Valley, including Alloa, Grangemouth, Bo’ness, Stirling and Falkirk. If your town is not listed, send the postcode and we will confirm.
Are prices different in the Forth Valley?
Our guide prices are adjusted by region. In the Forth Valley we use Scotland rates, so positive input ventilation (PIV) loft unit, supplied and fitted is typically £775 to £1,350 inc VAT per home.
Send a photo of your loft hatch area and landing ceiling for a quicker Forth Valley quote.
Other services in the Forth Valley
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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.