Heating accounts for the largest portion of UK household energy bills. With the energy price cap still above pre-2021 levels in 2026, finding ways to use less heating without being cold is one of the most impactful financial moves a household can make. These tactics don't require expensive upgrades.
Thermostat Settings That Save Money
The Energy Saving Trust recommends 18-21°C as the comfortable room temperature range. Every degree you lower your thermostat saves approximately 10% on heating costs. 1°C reduction on a typical UK gas bill saves around £100-£150/year. Programme your thermostat to reduce temperature at night (bedrooms do not need 21°C) and when the house is empty.
- •18-21°C: recommended comfortable range
- •Every 1°C reduction saves ~10% on heating
- •Night setback: reduce to 16-18°C when sleeping
- •Away mode: reduce to 13-15°C when property is empty
- •Smart thermostat (Nest, Hive): learns patterns, prevents overheating
- •TRV radiator valves: set individual room temperatures
Should I keep heating on low all day or on with a timer?+
On a timer wins. Keeping heating on low all day wastes energy heating an empty house. Only heat when you need it — modern boilers heat quickly. The exception is very old, poorly insulated properties where slow warm-up matters.
Draught-Proofing: Best ROI in the Home
Draught-proofing is the single best-value energy efficiency investment for most UK homes. Gaps around windows, doors, letterboxes, and floorboards allow significant heat loss. DIY draught-proofing materials cost £50-£200 and can save £30-£80/year on heating bills — payback under 3 years. Professional draught-proofing costs more but saves more.
- •Door draught excluders: £5-£15, instant saving
- •Self-adhesive foam strips for windows: £3-£10
- •Letterbox brush seal: £5-£15
- •Chimney balloon (for unused fireplaces): £20-£30 — blocks major heat loss
- •Skirting board gaps: fill with flexible filler or silicone
- •Loft hatch insulation: often overlooked, significant heat loss
Boiler Efficiency
An annual boiler service (£60-£120) keeps your boiler running efficiently and prevents expensive breakdowns. Bleeding radiators removes trapped air that makes them heat unevenly and forces the boiler to work harder. Setting your boiler flow temperature to 60°C instead of 80°C can save 6-8% on gas consumption with a condensing boiler.
- •Annual boiler service: £60-£120, extends boiler life and efficiency
- •Bleed radiators: free, improves heat distribution
- •Reduce boiler flow temperature to 60°C for condensing boilers
- •Thermostatic radiator valves (TRVs): add if not already present
- •Boiler cover: check if included in home insurance before buying separately
Insulation: The Long-Term Fix
Loft insulation (100-270mm recommended) can save £150-£350/year. Cavity wall insulation can save £150-£350/year. Both can often be provided free via ECO4 or the Great British Insulation Scheme for qualifying households. For owner-occupiers who don't qualify for free schemes, payback periods for loft insulation are typically 2-4 years.
- •Loft insulation 270mm: saves £150-£350/year on average
- •Cavity wall insulation: saves £150-£350/year
- •Check ECO4 eligibility — may be free for low-income households
- •Great British Insulation Scheme: broader eligibility, often free
- •Underfloor insulation for suspended timber floors: often overlooked
#heating bills#energy saving#boiler#thermostat#draught proofing uk
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