- Area
- South Glamorgan
- Postcode district
- CF64
- Nation
- Wales
- Guide price
- Priced after survey
- Survey
- Free for installation enquiries
Before you book: heat loss surveys in Penarth
Every property in Penarth is different, so the design starts from measurements rather than a rule of thumb. That keeps the system the right size and the running costs predictable.
The survey in Penarth includes a check of where the outdoor unit could sit and how its sound would reach neighbours. For Penarth homes with extensions or loft conversions, each part of the house is assessed on its own construction.
Every heat pump we quote starts with a room-by-room heat loss survey, free with installation enquiries and also available as a stand-alone report.
- Homes with an existing heat pump that seems undersized or expensive to run
- Self-builders and architects who need emitter and system sizes early
- Homeowners planning insulation or building work who want to know the effect on heat demand
What's included
- Recommended heat pump size and design flow temperature
- Electrical supply and network operator notes
- Hot water cylinder sizing for your household
- Outdoor unit siting options and noise check
- Radiator schedule with any upgrades needed for each room
Design outdoor temperatures for Penarth and the wider South Glamorgan come from local cold-weather data, not a national average.
Grants and rules for heat pumps in Wales
Homes in Penarth can use the Boiler Upgrade Scheme, which applies in Wales as well as England: £7,500 towards an air source heat pump, or £9,000 when it replaces oil or LPG heating for installations from 21 July 2026 to 31 March 2027. The MCS-certified installer named in your quote applies and deducts the grant.
There is no VAT on installing a heat pump anywhere in the UK, Wales included, until 31 March 2027. Planning rules for heat pumps in Wales are set by the Welsh Government and differ from England's, so the surveyor checks the unit position against them.
Heat loss survey costs around Penarth
The ranges below are typical installed prices for homes in South Glamorgan, including VAT. A survey sets the exact figure, because two similar-looking houses in Penarth can need quite different radiators and pipework.
| Survey | Guide price |
|---|---|
| Home survey and heat loss calculation with an installation quote | Free |
| Stand-alone heat loss survey and report | £150–£400 |
Inc VAT. A stand-alone report is for homeowners who want the design without an installation quote.
Designing for Penarth's winters
Penarth sees roughly 7 hours 50 minutes of daylight in late December against 16 hours 38 minutes in June. Milder southern winters suit heat pumps well, though the system is still sized for a cold snap rather than an average day.
How installation works in Penarth
- Start online with a guide price or call us.
- A home survey in Penarth gives us the room-by-room heat loss.
- Your written quote sets out the design, the price and the grant position where you live.
- Installation is booked for dates that suit you; most homes take 2–4 days on site.
- After commissioning you get a handover of the controls and settings, plus the certificates.
Heat loss surveys in Penarth: questions
What size heat pump does a Penarth home need?
It depends on the heat loss, not the postcode. As a rough guide, a 3 bedroom semi often needs 6–9 kW, but the room-by-room survey sets the actual size for your Penarth home.
Can you service a heat pump in Penarth that someone else installed?
Yes. We arrange servicing and repairs for most air source heat pumps in Penarth, whoever fitted them. Tell us the make and model when you book.
Do I need new radiators for a heat pump in Penarth?
Often some, not all. Heat pumps run best at lower water temperatures, so rooms with small radiators may need larger ones. The survey of your Penarth home gives a room-by-room list.
What is a design flow temperature?
The design flow temperature is the temperature of the water sent to your radiators or underfloor heating on the coldest design day. Heat pumps are more efficient at lower flow temperatures, typically around 35–50°C. Choosing it is a balance: a lower figure improves efficiency but can mean larger radiators in some rooms, so the design shows both.
Is the heat loss survey free?
Yes, for installation enquiries the home survey and heat loss calculation are free, and the results form the basis of your written quote. If you only want the calculation and report, for example for building plans or comparing quotes, a stand-alone heat loss survey has a guide price of £150–£400, including VAT. We confirm which applies when you book.