Single-room heat recovery units in Hertfordshire

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 Hertfordshire gets a written quote before it starts and a commissioning record when it finishes. We cover Hatfield, Bishop's Stortford, Watford, Hemel Hempstead and Stevenage and the villages around them.

Single-room heat recovery in Hertfordshire at a glance

Area: Hertfordshire
Towns listed: 32, largest Watford
Postcode districts: SG12, SG13, HA6, WD3, EN6 and WD2
Price region: East of England
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 Hertfordshire

Single-room heat recovery units guide prices in Hertfordshire
Work	Guide price
Single-room heat recovery unit through an outside wall (per unit)	£625–£1,150 inc VAT

Guide prices using East of England 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 England

In England, ventilation is covered by Part F of the Building Regulations and its guidance, Approved Document F (2021 edition). 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 Hertfordshire

Questions about single-room heat recovery units in Hertfordshire

Are prices different in Hertfordshire?

Our guide prices are adjusted by region. In Hertfordshire we use East of England rates, so single-room heat recovery unit through an outside wall is typically £625 to £1,150 inc VAT per unit.

Do they need servicing?

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

Will it work through a cavity wall?

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

Is the survey free in Hertfordshire?

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 Hertfordshire?

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.