Whiston, Merseyside
Positive input ventilation (PIV) in Whiston
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Whiston and L34, L35 and L36.
- From £750 inc VAT per home
- Free survey
PIV is often a good fix for Whiston homes with condensation on every window.
For positive input ventilation (PIV) in Whiston, 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 Whiston at a glance
- Town
- Whiston, Merseyside
- Postcode districts
- L34, L35 and L36
- Nearby
- Prescot (1 mile), Rainhill (1 mile) and Huyton (2 miles)
- Price region
- North West
- Survey
- Free survey (UK mainland)
PIV for Whiston 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.
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 Whiston
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £750–£1,325 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £950–£1,600 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £140–£280 inc VAT |
These ranges use our North West rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Signs it is time to call us
- 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). 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 Whiston
How do I get a price for a PIV unit in Whiston?
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 install?
A loft-mounted PIV unit usually costs £795 to £1,395 including VAT supplied and fitted, and £995 to £1,695 for a wall-mounted unit in a flat. A heater module adds around £145 to £295.
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.
What area around Whiston do you work in?
All of Merseyside. Near Whiston that includes Prescot, Rainhill, Huyton and St Helens.
Do you cover Whiston and nearby?
Yes. We cover Whiston and nearby places including Prescot, Rainhill, Huyton and St Helens. Send your postcode and we will confirm.
We will check the existing fans in your Whiston home at the same visit, because PIV works best with them working.
PIV near Whiston
More services in Whiston
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.