Free indicative tool

Energy Savings Calculator

Model the financial case for your energy upgrades in under five minutes. Enter your bills and toggle the measures that apply to your site.

1 Your annual energy bills
£/yr
£/yr
2 Unit prices (check your bill — defaults are 2025 averages)
p/kWh
p/kWh
p/kWh
3 Heating baseline
kWh

💡 Not sure? Divide your annual gas bill by your gas unit price, or use 18,000 kWh as a starting point for a medium commercial unit.

4 Site context (for grant matching)
5 Toggle your upgrade options
LED lighting upgradeElectricity
£
Heating efficiency upgradeHeating fuel
%
%
£
Smart heating controlsHeating fuel
%
£
Insulation upgradeHeating fuel
%
£
Draught-proofingHeating fuel
%
£
VSD on HVAC / refrigeration fans & pumpsElectricity
%
%
£
Fan/pump power scales with speed³ (affinity laws). A 20% speed reduction saves ~49% of shaft power. Your engineer can confirm the right settings for your equipment.
Solar PVElectricity
kWp
kWh/kWp
%
p/kWh
£
Yield of 850–950 kWh/kWp/yr is typical for south-facing UK/Ireland roofs. Self-consumption depends on your occupancy hours — higher daytime usage = better economics.
Heat pump (ASHP)Fuel → Elec
%
£
Saving = existing fuel cost minus new electricity cost. At current prices (gas ~7p, electricity ~26p) a COP of 3.7+ is needed to break even. A full audit will assess your building's suitability and the right system size.
Your estimated savings
Annual saving
£0
per year
Total investment
£0
to install
Blended payback
–
years
MeasureSaving/yrCostPayback
Toggle on a measure above to see its estimated saving here.

Get your confirmed numbers

This tool gives you a useful indication — a Valence Energy site audit gives you figures verified against your actual data, a detailed written report, and a supported grant application.

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These are indicative estimates only, not a statutory EPC. Figures should be validated against metered data before quoting.