Rainham, Greater London
Positive input ventilation (PIV) in Rainham
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Rainham and RM10, RM12 and RM13.
- From £950 inc VAT per home
- Free survey
Condensation in Rainham homes usually has one of two answers: better extract fans, or PIV as well.
Work in Rainham follows the rules for England and finishes with a written record of what was fitted and how it was set up.
PIV in Rainham at a glance
- Town
- Rainham, Greater London
- Postcode districts
- RM10, RM12 and RM13
- Nearby
- Elm Park (2 miles), Belvedere (3 miles) and Dagenham (3 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
What the work involves
Loft air is usually a little warmer and drier than outside air, and the unit filters it before it comes down into the house. 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.
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 Rainham
| 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). 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 Rainham
How do I get a price for a PIV unit in Rainham?
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.
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 area around Rainham do you work in?
All of Greater London. Near Rainham that includes Elm Park, Belvedere, Dagenham and Hornchurch.
Do you cover Rainham and nearby?
Yes. We cover Rainham and nearby places including Elm Park, Belvedere, Dagenham and Hornchurch. Send your postcode and we will confirm.
Tell us whether your Rainham home has a loft and we can price a PIV unit before visiting.
PIV near Rainham
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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.