MVHR installation in Cornwall

If you are making a Cornwall house warmer and tighter, MVHR keeps the air fresh without throwing the heat away.

If you are anywhere in Cornwall, send the postcode and a few photos and we will tell you what we would recommend. Towns we cover include Bodmin, Redruth, Falmouth, St Austell and Truro.

MVHR in Cornwall at a glance

Area: Cornwall
Towns listed: 10, largest Redruth
Postcode districts: PL30, PL5, PL11, TR12, TR13 and TR14
Price region: South West
Survey: Free survey (UK mainland)

What MVHR installation involves

A single unit, usually in the loft, a utility cupboard or a garage, runs all the time at a low, quiet speed. Insulated ducts carry extract air from the wet rooms and supply air to the habitable rooms. 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.

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.

New build or full renovation

Ducts go in at first fix before plasterboard, which is the cheapest and neatest time to fit MVHR.

Guide prices in Cornwall

MVHR installation guide prices in Cornwall
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

Guide prices using South West rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.

Signs it is time to call us

A new build or extension where the SAP or building control needs a ventilation system
Stale air or cooking smells that hang around
Pollen or traffic pollution you want filtered out

Rules in England

English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. It sets extract rates for kitchens, bathrooms and utilities and asks for mechanical ventilation to be commissioned and recorded.

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 Cornwall

Questions about MVHR installation in Cornwall

Which rules apply to ventilation in Cornwall?

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.

Do I keep my trickle vents with MVHR?

No. Under Approved Document F, background ventilators should not be installed with a whole-home MVHR system, so we advise closing or removing them once the system is commissioned.

How often does MVHR need servicing?

Filters usually need changing every 6 to 12 months, and a full service with a clean and airflow check once a year keeps the system efficient. Clogged filters are the most common reason MVHR stops working properly.

Which towns in Cornwall do you cover?

All of Cornwall, including Bodmin, Redruth, Falmouth, St Austell and Truro. If your town is not listed, send the postcode and we will confirm.

Are prices different in Cornwall?

Our guide prices are adjusted by region. In Cornwall 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.

Call or message us with your postcode and the number of bedrooms and we will come back with a guide price for Cornwall.