Costed guides, free calculators and grant checks for UK homeowners weighing up solar, heat pumps, insulation and glazing.
Browse installers by area and service. Listings come from public business data, so check MCS or FENSA registration yourself before you book.
Guides are published under the name of the editor, Ian Duncan, with sources cited. Sponsored placements are labelled and never change a recommendation.
Installation costs, grant figures and payback periods cite Ofgem, gov.uk and Energy Saving Trust sources, and each page shows when it was last updated.
Guides & Costs
Free Calculators
Built on Ofgem 2026 cap rates, current grant figures and real UK installation costs.
Heat loss reduction and annual energy savings for your home type.
Open CalculatorTell us about your project and we pass it to up to three vetted UK installers. No obligation, and we never share your details without your consent.
Latest News
Martin Lewis warns energy bills have hit breaking point as new price cap graphs emerge. We break down what it means for UK homeowners and how to cut costs.
Nesta warns scrapping the Boiler Upgrade Scheme would cause policy disarray. We break down grant cuts, costs for a 3-bed semi and what homeowners should do now.
A Budget cut to the Boiler Upgrade Scheme would leave a typical 3-bed semi facing £7,500 for a heat pump, as new research says insulation schemes understate heat loss.
The IMF warns food and energy prices will keep UK inflation sticky. We break down what that means for your mortgage, EPC upgrade and energy bills.
Daily Express and AOL pick up an eight-point energy-saving checklist for UK households. We cost each measure and match it to grants, EPC bands and payback.
Ofgem has told households to take three steps before energy bills rise for millions. We break down the real costs, grants and EPC impact for UK homeowners.
Q&A Library
Latest Articles
The radiator oversize factor is the multiplier applied to a room's heat loss to find the radiator output needed. MCS 021 sets it at 3.1x for a heat pump at…
Count every energy efficiency measure your home has ever had against Approved Document F Table 3.1, then read Category A, B or C off Diagram 3.1. Two minor measures with…
A lawful development certificate is a legally binding council decision confirming your work did not need planning permission. Under section 192, before you build, the fee is half the full…
There is no 2028 EPC deadline in England or Wales. DESNZ set one date, 1 October 2030. The decisive date is 1 October 2029: a property graded C or above…
EDF GoElectric publishes 6.99p/kWh over a seven-hour window, against British Gas EV Power at 9p over five hours. Octopus and E.ON price by distribution region, so no one tariff is…
Rarely. Octopus installs a 10 kWh battery with no solar panels from £5,336. On Intelligent Octopus Go's 8p off-peak rate, which requires an electric car, displacing 6 kWh each evening…
