MVHR installation in Wiltshire

MVHR often makes sense in Wiltshire homes that have recently been insulated, re-windowed or made more airtight.

Wiltshire has every kind of building, from old terraces to new estates and business parks, and every job is designed around the building in front of us, not a standard kit.

MVHR in Wiltshire at a glance

Area: Wiltshire
Towns listed: 14, largest Swindon
Postcode districts: SN11, SN15, BA13, BA14, SN10 and SN12
Price region: South West
Survey: Free survey (UK mainland)

What the work involves

Inside the unit the two airflows pass each other across a heat exchanger without mixing, so the incoming fresh air picks up heat from the outgoing air. Filters on both sides keep pollen and dust out of the house and keep the exchanger clean. MVHR works best in a home that is reasonably airtight: a new build, a deep retrofit with insulation and new windows, or a renovation where ceilings are coming down anyway.

Radial semi-rigid ducting

One small duct per valve from a manifold. Quieter and easier to balance than branched rigid duct in most homes.

Summer bypass and boost controls

Bypass lets cooler night air in without heat recovery; humidity or switch boost for showers and cooking.

Retrofit in an occupied home

Ducts routed through the loft and down through cupboards or boxed corners. Most semis are done in 3 to 5 days.

Guide prices in Wiltshire

MVHR installation guide prices in Wiltshire
Work	Guide price
Whole-home MVHR retrofit, 1 to 2 bedroom flat (per home)	£4,625–£7,250 inc VAT
Whole-home MVHR retrofit, 3 bedroom house (per home)	£6,700–£9,850 inc VAT
Whole-home MVHR retrofit, 4 to 5 bedroom house (per home)	£9,300–£14,500 inc VAT
MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms (per home)	£5,150–£8,250 inc VAT

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

When to get it looked at

Pollen or traffic pollution you want filtered out
Condensation on windows every morning in winter
Mould coming back in bedrooms or bathrooms after cleaning

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 and room schedule
Design and airflow rates
First fix
Second fix and valves
Commission and hand over

Towns we cover in Wiltshire

Questions about MVHR installation in Wiltshire

Which rules apply to ventilation in Wiltshire?

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.

Can MVHR cool the house in summer?

MVHR is not air conditioning, but a summer bypass lets cooler night air in without warming it, which helps take the edge off hot rooms. For real cooling you would need a separate system.

How much does MVHR cost to install?

A typical retrofit costs £6,450 to £9,450 including VAT for a three-bedroom house, and £4,950 to £7,950 when it goes in during a new build or full renovation. Flats start lower and large detached homes cost more because of the duct runs. We give a fixed price after the survey.

Which towns in Wiltshire do you cover?

All of Wiltshire, including Melksham, Warminster, Calne, Westbury and Swindon. If your town is not listed, send the postcode and we will confirm.

Are prices different in Wiltshire?

Our guide prices are adjusted by region. In Wiltshire we use South West rates, so whole-home MVHR retrofit, 1 to 2 bedroom flat is typically £4,625 to £7,250 inc VAT per home.

Send us a floor plan or a few photos of the loft and we can give a first price for your Wiltshire home before we visit.