Hemel Hempstead, Hertfordshire
Positive input ventilation (PIV) in Hemel Hempstead
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Hemel Hempstead and HP1, HP2 and HP3.
- From £825 inc VAT per home
- Free survey
If your Hemel Hempstead flat has no loft, a wall-mounted PIV unit does the same job through an outside wall.
Customers in Hemel Hempstead can get a guide price online in a couple of minutes. It uses East of England rates, which is what we would charge for the same job anywhere in Hertfordshire. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.
PIV in Hemel Hempstead at a glance
- Town
- Hemel Hempstead, Hertfordshire
- Postcode districts
- HP1, HP2 and HP3
- Nearby
- Abbots Langley (4 miles), Berkhamsted (5 miles) and St Albans (5 miles)
- Price region
- East of England
- Survey
- Free survey (UK mainland)
How we approach PIV in Hemel Hempstead
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. Flats without a loft use a wall-mounted unit that draws air from outside through a cored hole.
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 Hemel Hempstead
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £825–£1,475 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £1,050–£1,775 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £150–£310 inc VAT |
Guide prices using East of England 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
- You have no loft but still need whole-flat ventilation (wall unit)
- Streaming windows on most mornings in winter
- Black mould on window reveals and in corners of bedrooms
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 Hemel Hempstead
How do I get a price for a PIV unit in Hemel Hempstead?
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 Hemel Hempstead do you work in?
All of Hertfordshire. Near Hemel Hempstead that includes Abbots Langley, Berkhamsted, St Albans and North Watford.
Do you cover Hemel Hempstead and nearby?
Yes. We cover Hemel Hempstead and nearby places including Abbots Langley, Berkhamsted, St Albans and North Watford. Send your postcode and we will confirm.
Get a PIV guide price for your Hemel Hempstead home online, then confirm it on a free survey.
PIV near Hemel Hempstead
More services in Hemel Hempstead
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.