LOTUS ENERGY

Surrey Heating Engineers

Heat pumps in Guildford and Surrey

A heat pump will heat most homes in Surrey, including older ones, if the system is designed for the building. Some need a few radiators changed. Some need none. The only way to know is a heat loss survey, which we do room by room. Our survey starts at £250 including VAT and you get a written answer on suitability and running cost before you commit to anything.

What it costs to run

Our own figures, using the Ofgem price cap for 1 October to 31 December 2026 (GB average, direct debit): electricity 26.32p per kWh, gas 7.97p per kWh. For a home needing 12,000 kWh of heat a year:

Gas boiler at 90% efficiency: £1,063 a year.

Heat pump at SCOP 4.0: £790 a year, £273 less than the boiler.

Heat pump at SCOP 3.5: £902 a year, £160 less.

Heat pump at SCOP 3.2: £987 a year, £76 less.

A badly designed heat pump running at SCOP 2.5 costs £1,263 a year, £200 more than the boiler. On these prices a heat pump breaks even with gas at a SCOP of about 3.0, or 2.7 once you count the gas standing charge you stop paying (£108 a year). That is why the design matters more than the brand. A time of use tariff cuts the heat pump figures further; we can show you what that looks like for your house at the survey.

Last updated 18 September 2026. Full working in our running costs article.

The grant

We are MCS registered, so our installations qualify for the Boiler Upgrade Scheme. The grant is £7,500 towards an air source heat pump. If your home is heated by oil or LPG and has no mains gas connection, it is £9,000 until 31 March 2027. We apply for the grant on your behalf, so the price you see is the price after the grant.

How we design a system

Room by room heat loss calculation, not an estimate from floor area. Radiators and pipework checked against the calculated heat loss and changed only where they need to be. Hot water cylinder sized for the household. Commissioning to the design figures, with the settings written down and left with you.

Where we work

Guildford, Godalming, Woking, Dorking, Farnham, Cranleigh, Haslemere, Weybridge, Walton-on-Thames, Petersfield and the villages between.

Please get in touch

Send an enquiry and we will come back to you to arrange a survey or a visit. The enquiry and the first conversation are free.

What we install

Air source heat pumps

Find out more...

How do heat pumps work?

An air source heat pump takes heat from the outside air, even in winter, and moves it into your heating and hot water using a refrigerant cycle, the same principle as a fridge run in reverse. For every unit of electricity it uses it delivers three to four units of heat, which is where the running cost saving comes from.

Here is a quick explainer video.