Live demo
Interactive 3D house tour
Look inside an ordinary 1930s semi that runs entirely on electricity. A guided tour flies through the heat pump, hot water cylinder, radiators, solar panels, home battery, car charger and induction hob, and twenty things in all are explained in plain English, each with its sources. Switch from afternoon to evening to see the battery and the cheap overnight hours at work.
How this works: method, sources and limits.
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Shows how a whole all-electric home fits together, without a site visit.
More tools
Savings calculator
Sizes heat pumps, solar, and batteries for a specific UK property, then estimates costs, savings, and carbon reduction.
Grant finder
Enter a postcode and answer a few short questions to see which UK grants and funding schemes a household could get.
Boiler escape plan
Helps homeowners plan a boiler replacement before it breaks down, with a personalised readiness plan and calendar reminders. Covers gas, oil and LPG.
Radiator check
Which radiators would need changing for a heat pump, and which are a straight swap – from the radiator type in each room, no measuring.
Installer finder
Postcode search for nearby renewable energy installers, filtered by technology, with contact details and MCS verification links.
Home energy technology visualiser
Preview a life-size heat pump, hot water cylinder, home battery or solar inverter in your own space using augmented reality on a phone or tablet. No app download.
Sound simulator
Play a real heat pump recording and measure the decibel level from anywhere around the home using the phone microphone.
Watt's House
The same all-electric house, explored with Watt the cat. Send him round the house and whatever he sits beside is explained.