Positive input ventilation (PIV) in Bow

For a typical Bow semi or terrace, a loft PIV unit is often the quickest way to dry the house out.

Bow is about 107 miles from our base in Great Barr, Birmingham. We book Bow visits by appointment and confirm the date in writing. Surveys for new installations are free on the UK mainland, with a written quote afterwards.

PIV in Bow at a glance

Town: Bow, Greater London
Postcode districts: E3, E14 and E15
Nearby: Stratford (1 mile), Limehouse (1 mile) and Stepney (1 mile)
Price region: London
Survey: Free survey (UK mainland)

What the work 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.

Heated PIV

A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.

Wall-mounted PIV for flats

Draws air from outside through an outside wall. Suits flats and homes with no loft space.

Guide prices in Bow

Positive input ventilation (PIV) guide prices in Bow
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

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 that apply in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. For homes, it sets minimum extract rates such as 15 litres a second for a bathroom and 30 or 60 for a kitchen, and expects mechanical systems to be airflow-tested.

Questions from Bow

Do you cover Bow and nearby?

Yes. We cover Bow and nearby places including Stratford, Limehouse, Stepney and Blackwall. Send your 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.

What is the price of a PIV unit in Bow?

Guide prices for Bow use London rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £950 to £1,675 inc VAT per home. We confirm a fixed price in writing before any work starts.

Is the survey free in Bow?

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.

Send a photo of your loft hatch area and landing ceiling for a quicker Bow quote.