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Detached property, hosted by Roy

Vaillant air source heat pump in a 1920 - 1944 property

Roy

About me
Professionally a computer programmer I'm an early adopter on most technologies. We also have an EV, solar PV system and share in a wind farm (Ripple Energy). I feel it is important to share experiences to encourage take up of the technology.

Visiting my heat pump
Happy to be asked to do visits at dates and times that suit you.

Joined the network in 2025

Upcoming events

21 Sep 2025

10:00

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About this property

South Croydon, CR2

4 bedrooms

Air source heat pump

EPC rating: C (78)

Cost of energy bills per year: £1200 (includes power for car)

Installing the system

1930's house with insulated cavity wall. 300mm loft insulation. Full double glazing. The COP for heating seems to be around 4.5 - 4.9 with a flow temperature of around 32 degrees. Install took a whole week with about three days living using electric fans. Only one day without hot water. Three radiators were upgraded, all other plumbing was fine.

Living with a heat pump

Costs seem to have fallen. We are on Intelligent Octopus Go as we have an electric car, this gives us 6 hours of 7p/kWh electricity (as per 2025) which we use to heat the hot water overnight at about a third the cost of gas. Heating is more similar to gas in cost as we have to heat in the daytime. Our Solar Photovoltaic system and battery storage help reduce the amount of daytime electricity that we use. We also save the £100 or so gas standing charge. Radiators are cool but keep up with the heat loss of the house. The Vaillant 10kW heat pump seems efficient and pretty noiseless.

Hosted by Roy

They have already held more than 10 events.

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Accessing the venue

Easy to park on the street