The cheapest ways to heat your home in 2026
With energy prices still high, getting more warmth for less money matters. Here's what actually works — in order of impact.
There's a lot of noise about saving energy, much of it trivial. Here's an honest, ranked list of what genuinely moves the needle — starting with the biggest wins.
1. Stop the heat escaping (insulation)
The highest-impact thing you can do. Loft insulation tackles the ~25% lost upward; cavity wall insulation tackles up to a third lost through walls. Do these first.
2. Replace an inefficient boiler
An old non-condensing boiler can waste a third of its fuel. A modern A-rated replacement converts around 90%+ into useful heat.
3. Get your controls right
- A room thermostat and timer.
- Thermostatic radiator valves (TRVs).
- A smart thermostat that learns your routine.
4. The small habits that add up
Bleeding radiators, keeping them clear, closing curtains at dusk, dropping the thermostat a degree — worth doing, but finishing touches, not the foundation.
The takeaway
Spend top-down: insulation first, efficient heating second, controls third, habits fourth. Each step makes the next work better.
The order that saves the most
The biggest mistake is spending on heating before fixing the fabric. Insulate the loft and walls and draught-proof first — then your heating, whatever it is, works less hard for the same warmth. Only once the home holds heat well does it make sense to invest in efficient heating or low-carbon options like a heat pump.
Free wins to start today
- Thermostat down a degree; heating on a timer.
- Bleed radiators; keep them clear of furniture.
- Close curtains at dusk; draught-proof doors.