St Helier, Greater London
MVHR installation in St Helier
Whole-home heat recovery ventilation, designed room by room and airflow-tested at handover. Covering St Helier and SM1, SM4 and SM5.
- From £5,350 inc VAT per home
- Free survey
MVHR in St Helier works the same way as anywhere else: a quiet unit, a duct to every room and a proper airflow test at the end.
St Helier is about 109 miles from our base in Great Barr, Birmingham. We book St Helier visits by appointment and confirm the date in writing. We survey first, free of charge for new installations on the mainland, then send a fixed written quote.
MVHR in St Helier at a glance
- Town
- St Helier, Greater London
- Postcode districts
- SM1, SM4 and SM5
- Nearby
- Carshalton (1 mile), Morden (1 mile) and Mitcham (2 miles)
- Price region
- London
- Survey
- Free survey (UK mainland)
MVHR for St Helier homes
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.
New build or full renovation
Ducts go in at first fix before plasterboard, which is the cheapest and neatest time to fit MVHR.
Radial semi-rigid ducting
One small duct per valve from a manifold. Quieter and easier to balance than branched rigid duct in most homes.
Guide prices in St Helier
| Work | Guide price |
|---|---|
| Whole-home MVHR retrofit, 1 to 2 bedroom flat (per home) | £5,350–£8,350 inc VAT |
| Whole-home MVHR retrofit, 3 bedroom house (per home) | £7,750–£11,350 inc VAT |
| Whole-home MVHR retrofit, 4 to 5 bedroom house (per home) | £10,750–£16,750 inc VAT |
Guide prices using London rates. Prices include VAT at 20%. A guide price is not a quote: we confirm a fixed price in writing first.
Common reasons people call
- 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 that apply in England
English building work follows Approved Document F (2021 edition) for ventilation rates, installation and commissioning. 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.
Questions from St Helier
How do I get a price for MVHR in St Helier?
Use the guide price tool, the form on this page, live chat, WhatsApp or call 0800 088 6341. A postcode and a couple of photos help us give you a useful answer first time.
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.
What area around St Helier do you work in?
All of Greater London. Near St Helier that includes Carshalton, Morden, Mitcham and Wallington.
Do you cover St Helier and nearby?
Yes. We cover St Helier and nearby places including Carshalton, Morden, Mitcham and Wallington. Send your postcode and we will confirm.
Get a guide price online in two minutes, then book a free survey anywhere in St Helier.
MVHR near St Helier
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