The experiments
Click into any project to read what we're testing, try it for yourself, or sign up to help.
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In testing
v2.0 · betaFor homeowners
Savings Simulator 2.0
A faster, friendlier cost calculator that models your actual home, not a national average.
Try it →In testing
v0.4 · experimentFor everyoneWants testers
HeatBot
A chat assistant trained on the Heat Geek knowledge hub — no jargon, no sales pitch.
Try it →Live
v1.1For homeowners
The Heat Loss Visualiser
A short film and interactive model showing exactly where heat escapes, and what a proper design fixes.
Watch the demo →
Concept
prototypeFor homeownersWants testers
Radiator Doctor
Point your phone at a radiator and get an instant read on whether it's sized for low-temperature heating.
Read more →
In testing
v0.8 · internal betaFor installers
Geek Score
A live performance score for certified installers, built from real system data — not reviews.
Read more →
Live
v1.0For installersWants testers
Open Heat Loss
An open dataset and API of our heat-loss calculations, free for installers and researchers to build on.
Read more →