- Area
- Gwynedd
- Postcode district
- LL53
- Nation
- Wales
- Guide price
- Priced after survey
- Survey
- Free for installation enquiries
Heat loss survey for Pwllheli homes
Homes around Pwllheli range from older terraces to newer estates, and each needs a different design. That is why we survey before we quote.
A surveyor visits your Pwllheli home to measure each room, window and wall before any heat pump is sized. Design outdoor temperatures for Pwllheli and the wider Gwynedd come from local cold-weather data, not a national average.
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.
- Anyone getting a heat pump quote, as the first step
- 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
- Radiator schedule with any upgrades needed for each room
- Recommended heat pump size and design flow temperature
- Electrical supply and network operator notes
- Written results in your quote, or a stand-alone report if you order one
- Room-by-room heat loss calculation using the MCS method
Homeowners in Pwllheli thinking about insulation work can use the survey to see how it would change their heat pump size.
Grants and rules for heat pumps in Wales
Homes in Pwllheli 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.
Installing heat pumps is zero-rated for VAT across the UK until 31 March 2027. Wales has its own permitted development rules for air source heat pumps, so we check what applies to your property, including listed building and conservation-area constraints, at the survey.
Heat loss survey costs around Pwllheli
Guide prices for Pwllheli and the rest of Gwynedd are shown below, installed and inc VAT. We publish ranges rather than a single figure because design details move the price, and the written quote after survey fixes it.
| 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.
How long is the heating season in Pwllheli?
On the shortest day Pwllheli gets about 7 hours 35 minutes of daylight, with the noon sun around 14° up. The heating season runs from autumn into spring, so a heat pump that is sized correctly and set up with weather compensation does most of its work in steady, cool conditions.
How installation works in Pwllheli
- Tell us about your home: postcode, property type and current heating.
- We book a survey in Pwllheli; the surveyor measures rooms, windows and radiators and looks at cylinder space.
- The design and quote arrive in writing, including radiator changes and the outdoor unit position.
- On installation days the old system is removed and the new one fitted and filled.
- We commission the heat pump, show you the controls and register the installation.
Heat loss surveys in Pwllheli: questions
How long does a heat pump survey take in Pwllheli?
A home survey in Pwllheli usually takes one to two hours. The surveyor measures every heated room, checks windows, walls and radiators, and looks at where the outdoor unit and cylinder can go.
How long does installation take in Pwllheli?
Most installations take 2–4 days on site. Jobs with several radiator changes or new pipework take longer, and your quote for a Pwllheli home states the expected time.
Can you service a heat pump in Pwllheli that someone else installed?
Yes. We arrange servicing and repairs for most air source heat pumps in Pwllheli, whoever fitted them. Tell us the make and model when you book.
How long does a heat loss survey take?
A typical survey takes 1–3 hours on site, depending on the size and complexity of the home. Larger or older houses with mixed construction, extensions or many rooms take longer. The calculations and design are completed afterwards, and the results are included in your quote or stand-alone report.
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.