Positive input ventilation (PIV) in Heston

Condensation in Heston homes usually has one of two answers: better extract fans, or PIV as well.

For positive input ventilation (PIV) in Heston, send us the postcode, a few photos and a rough idea of the rooms involved. We will tell you what we would fit and roughly what it costs before arranging a visit.

PIV in Heston at a glance

Town: Heston, Greater London
Postcode districts: TW4, TW5 and UB2
Nearby: Osterley (1 mile), Hounslow (1 mile) and Isleworth (2 miles)
Price region: London
Survey: Free survey (UK mainland)

PIV for Heston homes

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.

Guide prices in Heston

Positive input ventilation (PIV) guide prices in Heston
Work	Guide price
Positive input ventilation (PIV) loft unit, supplied and fitted (per home)	£950–£1,675 inc VAT
Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat)	£1,200–£2,025 inc VAT
Heater module or heated PIV unit (extra over a standard unit) (extra)	£175–£355 inc VAT

London rates shown. Prices include VAT at 20%. The fixed price is confirmed in writing after we have seen the job.

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 that apply in England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

Questions from Heston

Is the survey free in Heston?

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.

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.

How long does PIV installation take?

A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.

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

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.

What area around Heston do you work in?

All of Greater London. Near Heston that includes Osterley, Hounslow, Isleworth and Cranford.

Book a free Heston survey and we will say honestly whether PIV, extract fans or both are needed.