Home ventilation, County Down
Single-room heat recovery units in County Down
Through-wall heat recovery for one problem room, without ducting the whole house, across County Down.
- From £550 inc VAT per unit
- By arrangement

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 County Down, including Castlereagh, Newtownards, Newry, Banbridge and Dundonald. Prices use Northern Ireland rates. Visits here are by arrangement: we quote travel separately and in writing before you commit.
Single-room heat recovery in County Down at a glance
- Area
- County Down, Northern Ireland
- Towns listed
- 8, largest Bangor
- Postcode districts
- BT6, BT16, BT19, BT35, BT32 and BT63
- Price region
- Northern Ireland
- Survey
- By arrangement, travel quoted first
What single-room heat recovery units involves
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. Two alternating units can work as a pair across a flat.
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 County Down
| Work | Guide price |
|---|---|
| Single-room heat recovery unit through an outside wall (per unit) | £550–£1,000 inc VAT |
Guide prices using Northern Ireland rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first. Travel is quoted separately for this area.
Common reasons people call
- A room with only one outside wall
- Mould in one bedroom that comes back every winter
- A flat with no loft and no ceiling void for ducts
Rules in Northern Ireland
Northern Ireland has its own building regulations, with ventilation guidance in Technical Booklet K. We design to the Northern Ireland guidance and measure the airflow achieved.
How the job runs
- Survey
- Quote
- Core and fit
- Wire and set up
- Hand over
Towns we cover in County Down
Questions about single-room heat recovery units in County Down
Which rules apply to ventilation in County Down?
In Northern Ireland, ventilation is covered by Technical Booklet K of the Building Regulations (Northern Ireland). Workplaces must be ventilated under the Workplace (Health, Safety and Welfare) Regulations (Northern Ireland) 1993.
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.
How noisy are they?
On low speed most units are quiet enough for bedrooms; sound-reduced models are available. Boost speed is more noticeable.
Which towns in County Down do you cover?
All of County Down, including Castlereagh, Newtownards, Newry, Banbridge and Dundonald. If your town is not listed, send the postcode and we will confirm.
Are prices different in County Down?
Our guide prices are adjusted by region. In County Down we use Northern Ireland rates, so single-room heat recovery unit through an outside wall is typically £550 to £1,000 inc VAT per unit.
Other services in County Down
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