Gravesend, Kent
Positive input ventilation (PIV) in Gravesend
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Gravesend and DA11, DA12 and RM18.
- From £875 inc VAT per home
- Free survey
For a typical Gravesend semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Customers in Gravesend can get a guide price online in a couple of minutes. It uses South East rates, which is what we would charge for the same job anywhere in Kent. Surveys for new installations are free on the UK mainland, with a written quote afterwards.
PIV in Gravesend at a glance
- Town
- Gravesend, Kent
- Postcode districts
- DA11, DA12 and RM18
- Nearby
- Tilbury (2 miles), Swanscombe (3 miles) and Grays (3 miles)
- Price region
- South East
- Survey
- Free survey (UK mainland)
What the work involves
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.
Loft-mounted PIV
The most common option for houses with a loft. Usually fitted in half a day.
Heated PIV
A heater module tempers the incoming air in cold weather. Useful in homes where people feel draughts.
Guide prices in Gravesend
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £875–£1,525 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,100–£1,875 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £160–£325 inc VAT |
South East 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
- Musty smell in wardrobes or behind furniture
- The house feels stuffy and damp rather than cold
- Washing dried indoors makes everything worse
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 Gravesend
How do I get a price for a PIV unit in Gravesend?
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.
Does PIV really stop condensation?
PIV reduces condensation in most homes because it dilutes moist air and keeps it moving, but it works best alongside working extract fans in the kitchen and bathroom. Leaks, rising damp or a cold bridge need fixing separately.
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.
What area around Gravesend do you work in?
All of Kent. Near Gravesend that includes Tilbury, Swanscombe, Grays and Longfield.
Do you cover Gravesend and nearby?
Yes. We cover Gravesend and nearby places including Tilbury, Swanscombe, Grays and Longfield. Send your postcode and we will confirm.
Get a PIV guide price for your Gravesend home online, then confirm it on a free survey.
PIV near Gravesend
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