Free tools
Home-energy tools
Straight answers in seconds — no email walls.
Whole-home energy plan
Your prioritised, costed plan.
Heat-pump readiness
Is your home ready?
EPC improvement planner
How to reach a C.
Radiator BTU calculator
Radiator size per room.
Heat-pump size calculator
The right kW for your home.
Grant eligibility checker
What you can claim.
Solar savings calculator
Generation, savings & payback.
Heat pump vs gas costs
Annual running-cost compare.
EV charging cost
Annual & per-mile cost.