Positive input ventilation (PIV) in Bletchley

PIV can suit Bletchley houses and flats because it treats the whole home from one quiet unit.

Whether the property is in the middle of Bletchley or one of the villages around it, the process is the same: a look at the building, a written price, then fitting and testing on the agreed day.

PIV in Bletchley at a glance

Town: Bletchley, Buckinghamshire
Postcode districts: MK1, MK2 and MK3
Nearby: Milton Keynes (4 miles), Leighton Buzzard (6 miles) and Newport Pagnell (6 miles)
Price region: South East
Survey: Free survey (UK mainland)

What the work 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.

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.

Guide prices in Bletchley

Positive input ventilation (PIV) guide prices in Bletchley
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£875–£1,525 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£1,100–£1,875 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£160–£325 inc VAT

These ranges use our South East rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.

Common reasons people call

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 that apply in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

Questions from Bletchley

What is the price of a PIV unit in Bletchley?

Guide prices for Bletchley use South East rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £875 to £1,525 inc VAT per home. We confirm a fixed price in writing before any work starts.

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.

Is the survey free in Bletchley?

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.

How do I get a price for a PIV unit in Bletchley?

Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.

We will check the existing fans in your Bletchley home at the same visit, because PIV works best with them working.