Positive input ventilation (PIV) in Renfrewshire and Inverclyde

If your Renfrewshire and Inverclyde flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.

Renfrewshire and Inverclyde has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.

PIV in Renfrewshire and Inverclyde at a glance

Area: Renfrewshire and Inverclyde, Scotland
Towns listed: 10, largest Paisley
Postcode districts: PA9, G60, G81, PA13, PA14 and G43
Price region: Scotland
Survey: Free survey (UK mainland)

What positive input ventilation (PIV) involves

Many units have a temperature sensor that reduces the flow or switches to a heater module on cold days, so the incoming air does not feel like a draught. 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.

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.

Loft-mounted PIV

The most common option for houses with a loft. Usually fitted in half a day.

Guide prices in Renfrewshire and Inverclyde

Positive input ventilation (PIV) guide prices in Renfrewshire and Inverclyde
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

You have no loft but still need whole-flat ventilation (wall unit)
Streaming windows on most mornings in winter
Black mould on window reveals and in corners of bedrooms

Rules in Scotland

Scottish projects follow the Technical Handbooks (section 3, Environment) under the Building (Scotland) Regulations, usually with a building warrant. 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 Renfrewshire and Inverclyde

Questions about positive input ventilation (PIV) in Renfrewshire and Inverclyde

Which rules apply to ventilation in Renfrewshire and Inverclyde?

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 Renfrewshire and Inverclyde do you cover?

All of Renfrewshire and Inverclyde, including Renfrew, Barrhead, Johnstone, Erskine and Port Glasgow. If your town is not listed, send the postcode and we will confirm.

Are prices different in Renfrewshire and Inverclyde?

Our guide prices are adjusted by region. In Renfrewshire and Inverclyde 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 Renfrewshire and Inverclyde quote.