Mayfield, Lothians
Positive input ventilation (PIV) in Mayfield
Loft or wall units that gently push filtered air into the home to tackle condensation. Covering Mayfield and EH19, EH22 and EH23.
- From £775 inc VAT per home
- Free survey

For a typical Mayfield semi or terrace, a loft PIV unit is often the quickest way to dry the house out.
Mayfield is about 234 miles from our base in Great Barr, Birmingham. We book Mayfield 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 Mayfield at a glance
- Town
- Mayfield, Lothians
- Postcode districts
- EH19, EH22 and EH23
- Nearby
- Dalkeith (2 miles), Bonnyrigg (3 miles) and Musselburgh (5 miles)
- Price region
- Scotland
- Survey
- Free survey (UK mainland)
What the work involves
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.
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 Mayfield
| Work | Guide price |
|---|---|
| Positive input ventilation (PIV) loft unit, supplied and fitted (per home) | £775–£1,350 inc VAT |
| Wall-mounted PIV unit for a flat (core drilled through an outside wall) (per flat) | £950–£1,625 inc VAT |
| Heater module or heated PIV unit (extra over a standard unit) (extra) | £140–£285 inc VAT |
Scotland 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
- 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 Scotland
Scottish projects follow the Technical Handbooks (section 3, Environment) under the Building (Scotland) Regulations, usually with a building warrant. We work to the Scottish ventilation standards and record the airflow achieved.
Questions from Mayfield
Is the survey free in Mayfield?
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.
How long does PIV installation take?
A loft unit is normally fitted in two to four hours, including the diffuser and electrical connection.
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.
How do I get a price for a PIV unit in Mayfield?
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.
What area around Mayfield do you work in?
All of the Lothians. Near Mayfield that includes Dalkeith, Bonnyrigg, Musselburgh and Tranent.
We will check the existing fans in your Mayfield home at the same visit, because PIV works best with them working.
PIV near Mayfield
More services in Mayfield
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.