Single-room heat recovery units in Greater London

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.

We carry out single-room heat recovery units across Greater London, including Barking, Archway, Sutton, Croydon and Brent. Prices use London rates. Surveys for new installations are free on the UK mainland, with a written quote afterwards.

Single-room heat recovery in Greater London at a glance

Area: Greater London
Towns listed: 216, largest Brent
Postcode districts: W11, W12, KT1, KT5, UB1 and UB5
Price region: London
Survey: Free survey (UK mainland)

What the work involves

Units fit into a cored hole in an outside wall. 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.

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 Greater London

Single-room heat recovery units guide prices in Greater London
Work	Guide price
Single-room heat recovery unit through an outside wall (per unit)	£725–£1,325 inc VAT

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

Signs it is time to call us

A flat with no loft and no ceiling void for ducts
Windows that cannot be left open for security or noise
You want fresh air without cold draughts

Rules 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.

How the job runs

Survey
Quote
Core and fit
Wire and set up
Hand over

Towns we cover in Greater London

Questions about single-room heat recovery units in Greater London

Are prices different in Greater London?

Our guide prices are adjusted by region. In Greater London we use London rates, so single-room heat recovery unit through an outside wall is typically £725 to £1,325 inc VAT per unit.

Will it work through a cavity wall?

Yes. The sleeve passes through both leaves and the cavity is sealed around it.

How much does a single-room heat recovery unit cost?

A single-room heat recovery unit usually costs £595 to £1,095 including VAT supplied and fitted, depending on the model and the wall.

Is the survey free in Greater London?

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.

Which rules apply to ventilation in Greater London?

In England, ventilation in new and altered homes is covered by Approved Document F of the Building Regulations. Landlords also have duties under the Housing Health and Safety Rating System, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.