Compare boilers, heat pumps, and heating systems for UK homes. Running costs, government grants, sizing guides, and advice on switching from gas to renewable heating.
506 articles
A DIY hot water jacket costs £15–£25 and cuts heat loss by 70–80%, saving £65–£90 per year. Payback takes just 3–4 months, and DIY saves £50–£80 compared to professional installation.
DIY radiator paint costs £12-£30 per tin, but painting reduces heat output by 5-15% versus an uncoated radiator. If your radiator is functional and not corroded, painting is cost-effective. If…
A DIY radiator bleed costs nothing and can save up to £100 a year in wasted energy. The Energy Saving Trust estimates annual bleeding reduces heating bills by 3–5%, equating…
A fair heat pump quote in 2026 is £12,000–£17,000 for an 8–12kW air-source system. Deviations over 20% from this range are red flags. Always check the breakdown for missing items…
A heat loss survey calculates your home's heat loss in kW, determining the correct size for a new heating system. It is mandatory for most UK heating grants in 2026,…
A heat pump install takes 2 to 5 days for a typical UK home. A straightforward gas boiler replacement in the same location takes 2-3 days, while a full system…
An air-source heat pump needs about 1m x 1m of garden footprint plus 1m clearance in front. Place it on a stable base 100mm above ground and screen with a…
Time-of-use heat pump tariffs from Octopus and EDF offer off-peak rates as low as 12p/kWh, compared to 24.5p/kWh on a standard tariff. Your annual savings depend on shifting heating to…
Replacing a faulty boiler air pressure switch costs £80–£250 on average, with a typical repair at £120–£180 including parts and labour. The switch part alone is £25–£60, and a Gas…
Heating system banging is most often trapped air (fixable by bleeding radiators for £0) or kettling from limescale (costing £150-£400 to descale). A cold radiator with noise suggests sludge needing…
Yes, heat pump leaking water is normal during defrost cycles and condensation from cooling mode. Water should stop after the cycle ends and only appear beneath the outdoor unit. Continuous…
Boiler E1 error means low water pressure below 0.5 bar. Fix it yourself by repressurising the system to 1.0-1.5 bar using the filling loop. This takes under 5 minutes and…
Boiler F1 error means low water pressure, typically below 0.5 bar. Most cases are fixed in 2-5 minutes by repressurising via the filling loop at no cost. Check the gauge…
Fix a hot water cylinder leak by replacing the body (£1,200-£2,000) or repairing the component (£80-£350). A single drip per second wastes over 1,000 litres yearly (Ofgem, 2026), so act…
A cold towel rail when the heating is on is most often caused by trapped air or an unbalanced system, not a broken boiler. Bleed the rail first; if no…
Underfloor heating not working? The most common cause is trapped air in the manifold, costing £80-£150 to bleed. Check the circuit breaker and thermostat first before calling a professional.
A frozen outdoor heat pump unit is usually a normal defrost cycle, not a fault. Frost clears automatically within 5–15 minutes. If ice lasts over 30 minutes or forms in…
Most heat pump strange noises are routine, not major failures. Gurgling often means trapped air, clicking is thermal expansion, and hissing can be normal defrost cycles. Check your manual before…
Radiators cold at the bottom add roughly £180 per year to heating bills. Sludge (magnetite) blocks hot water flow and must be removed professionally or with a magnetic filter. Compare…
A boiler pilot light that keeps going out is most often due to a faulty thermocouple, which costs £60-£120 to replace by a Gas Safe engineer. A blocked pilot jet…
Boiler losing pressure is almost always caused by a leak or a faulty expansion vessel. A leak causes steady pressure loss over days, while a faulty expansion vessel makes pressure…
LG Therma V heat pumps cost £7,000-£14,000 installed for a typical 3-bed home. The £7,500 Boiler Upgrade Scheme grant cuts net cost to £0-£6,500. SCOP ranges from 4.1 to 4.8,…
The Octopus Cosy 6 costs £2,500–£4,500 after the £7,500 BUS grant and saves £200–£400 per year. It is a monobloc air source heat pump with a SCOP of 3.2–3.5, ideal…
The Samsung EHS heat pump costs £500–£4,500 after the £7,500 BUS grant, with a SCOP of 3.2–3.6. It uses roughly 2,860 kWh of electricity per year for a typical 3-bed…
A new combi boiler costs between 2,000 and 3,500 pounds installed, including flue and controls. System boilers with a hot water cylinder cost 2,500 to 4,500 pounds. Prices vary by brand, output size, and complexity of the installation.
At 2026 energy prices, an air source heat pump with a COP of 3 costs roughly the same as a gas boiler to run. With electricity at 24.5p per kWh and gas at 7.2p per kWh, the heat pump produces heat at about 8.2p per kWh compared to gas at around 8p per kWh including boiler efficiency. The 7,500 pound BUS grant makes the overall economics favourable.
Yes, but older houses often need some preparation. The key requirements are adequate insulation, possibly larger radiators or underfloor heating for lower flow temperatures, and sufficient outdoor space for the external unit. A professional heat loss survey will determine what upgrades are needed.
The BUS provides 7,500 pounds towards installing an air source or ground source heat pump. Your home must have an EPC, be replacing a fossil fuel heating system, and use an MCS-certified installer. The property must be in England or Wales and you cannot have previously claimed a renewable heat incentive.
Air source heat pumps typically last 15 to 20 years, while ground source heat pumps can last 20 to 25 years. A well-maintained gas boiler lasts 10 to 15 years. Heat pumps have fewer moving parts and require less maintenance.
Air source heat pumps cost £800-£1,100 per year to run in a typical UK three-bedroom semi, comparable to a new gas boiler. With a £7,500 government grant available through the…
A hydrogen-ready boiler is a gas boiler engineered to switch to 100% hydrogen in the future with minor component changes, and in 2026 it costs roughly £100 to £300 more…
For most UK homeowners, an air source heat pump is the more practical and affordable choice, costing roughly £8,000–£15,000 installed before the £7,500 Boiler Upgrade Scheme grant reduces the net…
The Boiler Upgrade Scheme is a UK Government grant programme administered by Ofgem that provides upfront discounts of up to £7,500 off the cost of installing a low-carbon heating system…
The best smart thermostats available in the UK can save a typical household between £75 and £150 per year on heating bills, according to Energy Saving Trust guidance, with top-rated…
A new boiler installed in the UK in 2026 costs between £1,500 and £4,500 all in, covering the boiler unit, labour, and standard fitting materials. A simple like-for-like combi boiler…
