Single-room heat recovery units in Gwynedd and Anglesey

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 Gwynedd and Anglesey, including Bangor and Holyhead. Prices use Wales rates. The survey is free for new installations on the UK mainland, and the quote that follows is fixed and in writing.

Single-room heat recovery in Gwynedd and Anglesey at a glance

Area: Gwynedd and Anglesey, Wales
Towns listed: 2, largest Bangor
Postcode districts: LL57, LL58 and LL65
Price region: Wales
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.

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.

Kitchen-diner

A higher-rated unit sized for cooking moisture alongside an extract hood.

Guide prices in Gwynedd and Anglesey

Single-room heat recovery units guide prices in Gwynedd and Anglesey
Work	Guide price
Single-room heat recovery unit through an outside wall (per unit)	£575–£1,050 inc VAT

Guide prices using Wales 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

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 Wales

Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. Extract rates and commissioning are checked against the Welsh guidance on every job.

How the job runs

Survey
Quote
Core and fit
Wire and set up
Hand over

Towns we cover in Gwynedd and Anglesey

Questions about single-room heat recovery units in Gwynedd and Anglesey

Which rules apply to ventilation in Gwynedd and Anglesey?

In Wales, the Welsh Government's own Approved Document F (2022 edition) applies to ventilation in homes, with a new edition taking effect on 4 March 2027. Rented homes must be fit for human habitation under the Renting Homes (Wales) Act 2016, and workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations 1992.

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.

Do single-room heat recovery units work?

They work well in a room with a condensation problem, supplying fresh air and recovering much of the heat. They are not as efficient as whole-home MVHR but need no ducting.

Which towns in Gwynedd and Anglesey do you cover?

All of Gwynedd and Anglesey, including Bangor and Holyhead. If your town is not listed, send the postcode and we will confirm.

Are prices different in Gwynedd and Anglesey?

Our guide prices are adjusted by region. In Gwynedd and Anglesey we use Wales rates, so single-room heat recovery unit through an outside wall is typically £575 to £1,050 inc VAT per unit.