Positive input ventilation (PIV) in Sheerness

Condensation in Sheerness homes usually has one of two answers: better extract fans, or PIV as well.

Sheerness is about 137 miles from our base in Great Barr, Birmingham. We book Sheerness 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 Sheerness at a glance

Town: Sheerness, Kent
Postcode districts: ME11 and ME12
Nearby: Sittingbourne (7 miles), Southend-on-Sea (7 miles) and Canvey Island (10 miles)
Price region: South East
Survey: Free survey (UK mainland)

PIV for Sheerness 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.

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 Sheerness

Positive input ventilation (PIV) guide prices in Sheerness
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

These ranges use our South East rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.

When to get it looked at

Washing dried indoors makes everything worse
You have no loft but still need whole-flat ventilation (wall unit)
Streaming windows on most mornings in winter

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). It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

Questions from Sheerness

Do you cover Sheerness and nearby?

Yes. We cover Sheerness and nearby places including Sittingbourne, Southend-on-Sea, Canvey Island and Gillingham. Send your postcode and we will confirm.

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 is the price of a PIV unit in Sheerness?

Guide prices for Sheerness use South East rates: positive input ventilation (PIV) loft unit, supplied and fitted is typically £875 to £1,525 inc VAT per home. We confirm a fixed price in writing before any work starts.

Is the survey free in Sheerness?

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.

We will check the existing fans in your Sheerness home at the same visit, because PIV works best with them working.