Live demo
Boiler escape plan
Most UK homes will replace a boiler in a panic when it dies. This widget shows the carbon arithmetic of acting now versus locking in another decade of fossil heat, and turns into a personalised readiness plan with calendar reminders. It covers mains gas, heating oil and LPG – off-gas homes get their own numbers, and the strongest case for switching.
How this works: method, sources and limits.
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Reaches homeowners two to five years before their boiler fails, with a plan carrying your name.
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.
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.
3D house tour
A 3D cutaway of an all-electric home: heat pump, hot water, radiators, solar, a battery, car charging and cooking, with a guided tour of how it fits together.
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.