Heating and long-running loads usually dominate; measurement prevents spending heavily to solve a tiny load.
Health, ventilation, damp prevention and electrical safety come before theoretical savings.
Annual balance
Separate space heating, hot water, cooking, appliances and transport.
Measure
Use meter history and plug monitoring over representative periods.
Prioritise
Compare annual pounds saved, investment, lifetime and maintenance.
Verify
Normalise for weather, occupancy and tariff changes.
Frequently asked questions
Should every old appliance be replaced?
Not without evidence. Compare actual use, remaining life and replacement cost.
How current are the figures?
Each page shows its review date. Your live tariff and the latest official publication always take priority.
Sources and review date
Content reviewed on: 2026-08-03.
- GOV.UK – improve home energy efficiency — household efficiency