Single-room heat recovery units in Surrey

A single-room heat recovery unit is a compact through-wall fan that supplies and extracts air for one room while recovering much of the heat from the outgoing air. It is the answer when one bedroom, kitchen or flat has a condensation problem but whole-home ducting is not practical.

Every job in Surrey gets a written quote before it starts and a commissioning record when it finishes. We cover Ewell, Woking, Guildford, Esher and Redhill and the villages around them.

Single-room heat recovery in Surrey at a glance

Area: Surrey
Towns listed: 35, largest Woking
Postcode districts: KT18, GU15, GU16, GU25, TW18 and KT12
Price region: South East
Survey: Free survey (UK mainland)

What single-room heat recovery units involves

Some alternate direction every minute or so, storing heat in a ceramic core; others run supply and extract side by side through a small exchanger. Either way, the room gets fresh air without the heat loss of an open window. They are popular in flats, in north-facing bedrooms where mould keeps coming back, and in rooms with no route for ducting.

Sound-reduced versions

Quieter units for bedrooms.

Single problem room

One unit in the bedroom or kitchen that suffers most.

Paired units in a flat

Two alternating units working together across living spaces.

Guide prices in Surrey

Single-room heat recovery units guide prices in Surrey
Work	Guide price
Single-room heat recovery unit through an outside wall (per unit)	£650–£1,200 inc VAT

Guide prices using South East rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.

When to get it looked at

Mould in one bedroom that comes back every winter
A flat with no loft and no ceiling void for ducts
Windows that cannot be left open for security or noise

Rules 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.

How the job runs

Survey
Quote
Core and fit
Wire and set up
Hand over

Towns we cover in Surrey

Questions about single-room heat recovery units in Surrey

Which towns in Surrey do you cover?

All of Surrey, including Ewell, Woking, Guildford, Esher and Redhill. If your town is not listed, send the postcode and we will confirm.

Can one unit do a whole flat?

One unit treats one room well. For a whole flat, two paired units or a wall-mounted PIV unit with good extract fans is usually better.

Do they need servicing?

Filters need a clean every few months and occasional replacement, which most owners do themselves.

Are prices different in Surrey?

Our guide prices are adjusted by region. In Surrey we use South East rates, so single-room heat recovery unit through an outside wall is typically £650 to £1,200 inc VAT per unit.

Is the survey free in Surrey?

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.