MVHR installation in Gwynedd and Anglesey

Fitting MVHR in a Gwynedd and Anglesey home starts with where the unit can live and how ducts reach each room.

Gwynedd and Anglesey 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 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 MVHR installation 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.

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 Gwynedd and Anglesey

MVHR installation guide prices in Gwynedd and Anglesey
Work	Guide price
Whole-home MVHR retrofit, 1 to 2 bedroom flat (per home)	£4,225–£6,600 inc VAT
Whole-home MVHR retrofit, 3 bedroom house (per home)	£6,150–£9,000 inc VAT
Whole-home MVHR retrofit, 4 to 5 bedroom house (per home)	£8,500–£13,250 inc VAT
MVHR in a new build or full renovation (fitted at first fix), 3 to 4 bedrooms (per home)	£4,700–£7,550 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.

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 Wales

Wales has its own Part F ventilation guidance, published by the Welsh Government, and work is checked by building control. We design to the Welsh rates and commission mechanical systems so the results can be 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 Gwynedd and Anglesey

Questions about MVHR installation 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 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.

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.

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 whole-home MVHR retrofit, 1 to 2 bedroom flat is typically £4,225 to £6,600 inc VAT per home.

Book a free survey in Gwynedd and Anglesey and we will tell you honestly whether MVHR or something simpler suits the house.