Payback visualiser

When does this upgrade pay itself back?

Plug in three numbers — current bill, measure, install cost — and see year-by-year cumulative savings.

We use nominal figures (no assumed energy-price inflation). Real life usually pays back faster — we’d rather under-promise.

Combined gas + electricity. Annual figure, before any upgrade.

Pick the one you want to model. Run again to compare.

What you actually pay out of pocket. For BUS, deduct £7,500 first.