Carmarthen, Dyfed
MVHR servicing and filter changes in Carmarthen
Annual service, filters, heat exchanger clean and a measured airflow check for existing MVHR. Covering Carmarthen and SA31 and SA33.
- From £140 inc VAT per visit
- Charged visit, price agreed first

Many Carmarthen new builds have MVHR in the loft that nobody told the owners how to look after.
Carmarthen is about 112 miles from our base in Great Barr, Birmingham. We book Carmarthen visits by appointment and confirm the date in writing. Visits for this work are charged, with the price agreed before we arrive.
MVHR servicing in Carmarthen at a glance
- Town
- Carmarthen, Dyfed
- Postcode districts
- SA31 and SA33
- Nearby
- Llanelli (14 miles), Ammanford (14 miles) and Gorseinon (17 miles)
- Price region
- Wales
- Survey
- Charged visit, price agreed first
What the work involves
Over a year or two the filters clog, the fans work harder, airflow at the valves drops and the house slowly goes back to condensation and stale air. It is common for a system to go years without a filter change after the builder hands over.
Rebalance and recommission
Every valve measured and set again to the design rates, with a new commissioning sheet. Useful after building work or if rooms feel stuffy.
Filter supply
The right filters for your unit, ready to change yourself between visits.
Guide prices in Carmarthen
| Work | Guide price |
|---|---|
| MVHR service: filters, unit and heat exchanger clean, airflow check (per visit) | £140–£235 inc VAT |
| Rebalance and recommission an existing MVHR system (per system) | £235–£425 inc VAT |
| MVHR or MEV commissioning test, every terminal measured and recorded (per system) | £235–£375 inc VAT |
These ranges use our Wales rates. Prices include VAT at 20%. You get a fixed written price before any work is booked.
Common reasons people call
- The unit is louder than it used to be
- You have moved into a new build and nobody has serviced it
- Water dripping from the unit or ducts
Rules that apply in Wales
In Wales, ventilation follows the Welsh Approved Document F rather than the English version, with building control checking notifiable work. We design to the Welsh rates and commission mechanical systems so the results can be recorded.
Questions from Carmarthen
What area around Carmarthen do you work in?
All of Dyfed. Near Carmarthen that includes Llanelli, Ammanford, Gorseinon and Clydach.
Do I need to be at home for the service?
Someone needs to let us in and be there when we measure the valves, which means visiting every room. A service usually takes one to two hours.
My new build MVHR has never been serviced. Is that a problem?
It is very common and usually fixable. Builders often hand over without explaining filter changes, so the first service often finds filters that are badly blocked. We clean everything and reset the airflows.
Do you cover Carmarthen and nearby?
Yes. We cover Carmarthen and nearby places including Llanelli, Ammanford, Gorseinon and Clydach. Send your postcode and we will confirm.
What is the price of an MVHR service in Carmarthen?
Guide prices for Carmarthen use Wales rates: MVHR service: filters, unit and heat exchanger clean, airflow check is typically £140 to £235 inc VAT per visit. We confirm a fixed price in writing before any work starts.
Ask about filter supply when you book your Carmarthen service, so you can do the in-between changes yourself.
MVHR servicing near Carmarthen
More services in Carmarthen
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