Morden, Greater London
Positive input ventilation (PIV) in Morden
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Morden and SM4, SW19 and SW20.
- From £950 inc VAT per home
- Free survey
If your Morden flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
Customers in Morden can get a guide price online in a couple of minutes. It uses London rates, which is what we would charge for the same job anywhere in Greater London. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Morden at a glance
- Town
- Morden, Greater London
- Postcode districts
- SM4, SW19 and SW20
- Nearby
- St Helier (1 mile), Mitcham (1 mile) and Wimbledon (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for Morden homes
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.
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 Morden
| 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 |
Guide prices using London rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Signs it is time to call us
- Black mould on window reveals and in corners of bedrooms
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
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 Morden
What area around Morden do you work in?
All of Greater London. Near Morden that includes St Helier, Mitcham, Wimbledon and Worcester Park.
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.
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.
Do you cover Morden and nearby?
Yes. We cover Morden and nearby places including St Helier, Mitcham, Wimbledon and Worcester Park. Send your postcode and we will confirm.
What is the price of a PIV unit in Morden?
Guide prices for Morden 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.
We will check the existing fans in your Morden home at the same visit, because PIV works best with them working.
PIV near Morden
More services in Morden
Get a guide price in two minutes
Answer a few questions for a price range, or send photos and we will come back to you with a written quote.