Holborn, Greater London
Positive input ventilation (PIV) in Holborn
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Holborn and WC1A, WC1V and WC2B.
- From £950 inc VAT per home
- Free survey
PIV can suit Holborn houses and flats because it treats the whole home from one quiet unit.
For positive input ventilation (PIV) in Holborn, 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 Holborn at a glance
- Town
- Holborn, Greater London
- Postcode districts
- WC1A, WC1V and WC2B
- Nearby
- Soho (1 mile), King's Cross (1 mile) and West End (1 mile)
- Price region
- London
- Survey
- Free survey (UK mainland)
PIV for Holborn homes
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 Holborn
| 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.
Common reasons people call
- 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 Holborn
How do I get a price for a PIV unit in Holborn?
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.
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.
What area around Holborn do you work in?
All of Greater London. Near Holborn that includes Soho, King's Cross, West End and St James's.
Do you cover Holborn and nearby?
Yes. We cover Holborn and nearby places including Soho, King's Cross, West End and St James's. Send your postcode and we will confirm.
We will check the existing fans in your Holborn home at the same visit, because PIV works best with them working.
PIV near Holborn
More services in Holborn
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.