How to save money on heating bills: proven ways to cut costs

Published 28 January 2026

Reducing your central heating thermostat by just one degree represents the most effective way to cut energy costs immediately, with a variation on exactly how much money is saved, depending on your home size and current heating usage patterns.

The smart meter will show real-time reductions in energy consumption as your boiler works less intensively to reach the lower target temperature.

For optimal results, combine this adjustment with proper radiator management in each room. Focus heating on occupied spaces whilst reducing temperatures in spare bedrooms and less-used areas. This targeted approach maximises the financial benefits whilst maintaining warmth where you need it most.

Many modern combi boilers feature a dedicated summer setting that completely disables central heating whilst maintaining hot water supply. This simple switch can reduce energy bills during warmer months when space heating becomes unnecessary.

Activating summer mode typically involves turning a dial marked with a sun symbol or selecting the appropriate setting on your boiler's digital display. The change prevents your boiler from firing up to heat radiators, eliminating wasted energy that would otherwise warm your home when outdoor temperatures make heating redundant.

Consider switching when consistent daytime temperatures reach 14°C or above, usually between March and October. Unlike completely shutting down your boiler, summer mode keeps internal components active, preventing seized pumps and valves that could require expensive repairs when heating season returns.

Adjusting thermostatic radiator valves in rarely used spaces prevents wasted energy whilst maintaining comfort in your main living areas. Guest bedrooms, spare bathrooms, and storage rooms rarely need full heating, making them prime candidates for temperature reduction.

Rather than completely shutting off these radiators, set them to position 1 or 2 on the valve dial. This maintains minimal warmth to prevent dampness whilst dramatically reducing energy consumption. Remember to keep doors closed between heated and cooler zones to maximise efficiency gains.

Simple changes like this can cut your heating bills by approximately £50 annually for an average UK household. Check each unused room monthly and briefly activate heating to prevent mould growth, then return valves to the lower settings for continued savings.

Trapped air within your radiator system forces your boiler to work harder, wasting energy and increasing heating costs. When air pockets accumulate, hot water cannot circulate effectively, creating cold spots typically found at the top of radiators.

Start with ground floor radiators before moving upstairs, as air naturally rises through the system. You'll need a radiator key from any DIY shop and a cloth to catch drips. Turn off your heating completely and wait for radiators to cool.

Insert the key into the bleed valve and turn anti-clockwise slowly. Listen for the hissing sound of escaping air. Once water flows steadily without spluttering, close the valve immediately. This straightforward maintenance task takes just minutes per radiator but can make a big difference to your heating efficiency, ensuring every pound spent on energy actually warms your home rather than fighting against air blockages.

• Radiator reflector panels fitted behind units mounted on external walls can reduce heat loss. These thin foil sheets redirect warmth back into your room rather than allowing it to escape through uninsulated exterior walls. Unlike basic kitchen foil, purpose-made reflectors maintain their effectiveness for years without degrading or losing reflectivity.
• Installation requires no radiator removal - simply measure your unit, cut the reflective panel to size, and position it snugly behind the radiator using the included clips. The panels remain invisible once installed whilst continuously bouncing heat energy back where you need it most.
• Focus on radiators mounted against external walls where heat loss proves most significant. Internal wall units offer minimal benefit from reflectors since the escaping warmth stays within your property.

Professional draught-proofing around window and door frames tackles heat loss that accounts for a large proportion of energy waste in older UK properties. Unlike radiator adjustments, sealing these gaps requires identifying problem areas first using a simple candle test on windy days.

Weatherstripping proves most effective for moveable window sections, whilst silicone sealant works best for fixed frames. Quality materials matter significantly - choose exterior-grade products that withstand British weather conditions without degrading.

Target sash windows particularly, as their sliding mechanisms create natural gaps that worsen over time. Remember to seal only the top and sides of external windows, leaving the bottom unsealed to prevent moisture problems that could damage your property's structure.

Creating homemade draught excluders costs virtually nothing whilst delivering instant warmth improvements using materials already in your home. Old tights stuffed with rice, dried beans, or even rolled-up towels provide effective door seals that block cold air immediately.

Measure your door width (typically 76cm for UK homes) and cut fabric accordingly. Fill an old sock or trouser leg with newspaper, bubble wrap, or unused clothing scraps, then tie both ends securely. Position this simple barrier against your door base each evening.

Cutting shower duration from the average seven minutes to four minutes delivers substantial energy bill. This simple behavioural change requires no equipment purchases or professional installation, making it accessible to every household immediately.

Adjusting your hot water thermostat to 60°C provides the perfect balance between safety and energy efficiency.

Check your boiler's instruction manual before making adjustments, as combi boilers typically feature separate controls for radiator flow and domestic hot water.

Never reduce cylinder temperatures below 60°C, as this creates ideal conditions for harmful bacteria growth, including legionella.

For households with electrical appliances like dishwashers, verify your machine's temperature requirements first. Modern models work effectively at 60°C, whilst older units may need higher settings for optimal cleaning performance.

Proper loft insulation represents one of the most cost-effective home improvements available to UK households. Without adequate insulation, a huge amount of your home's heat escapes through the roof, forcing your heating system to work continuously.

The recommended insulation depth of 270mm creates a thermal barrier that dramatically reduces heat loss. Even homes with existing thin insulation benefit significantly from topping up to current standards.

Cavity wall insulation delivers exceptional energy savings for detached properties.

Detached homes benefit most from this improvement due to their larger exposed wall area compared to terraced or semi-detached properties. The installation process involves injecting insulating material into the gap between your home's inner and outer walls through small holes that are sealed afterwards.

Most UK detached houses built between 1920 and 1990 feature suitable cavity walls for this treatment. Professional surveys determine compatibility, as properties with narrow cavities or exposure to severe weather may require alternative solutions.

Several government-backed programmes can significantly reduce or eliminate insulation costs entirely for eligible household. The Great British Insulation Scheme provides funding until March 2026, targeting properties with Energy Performance Certificate ratings of D or lower.

The ECO4 scheme focuses on vulnerable households and those receiving qualifying benefits, potentially covering multiple energy efficiency measures simultaneously. Local Authority Flexible Eligibility extends these opportunities to working families who might otherwise miss out on support.

Many councils operate additional grant schemes tailored to their area's specific needs. These programmes often complement national funding, creating opportunities for comprehensive home improvements at minimal personal cost.

Check your eligibility through the government's Help to Heat tool online, or contact Citizens Advice for personalised guidance on available support in your area.

Zone heating systems with programmable thermostats can slash annual energy bills, depending on your property size and current heating setup. These advanced controls divide your home into separate temperature zones, allowing precise heating management for different areas throughout the day.

Unlike basic programmable timers that control your entire heating system, zone controls operate individual room circuits independently. You might heat your living room to 21°C during evening hours whilst maintaining bedrooms at 16°C until bedtime approaches.

Modern systems integrate with smartphone apps, enabling remote adjustments and learning your daily routines automatically. Although not cheap, the investment recovers itself through reduced energy waste from heating unoccupied spaces.

Replacing an outdated boiler with an A-rated condensing model delivers the most substantial heating bill reductions available to UK households.

Professional installation means optimal performance through correct sizing and system commissioning. Modern boilers integrate seamlessly with programmable controls and smart thermostats, maximising efficiency gains. The investment recovers itself through reduced gas bills, whilst providing enhanced reliability and reduced maintenance costs throughout the unit's 15-20 year lifespan.

Air source heat pumps present a compelling alternative to traditional boiler systems, and could benefit from government financial support. The £7,500 Boiler Upgrade Scheme significantly reduces upfront costs for eligible homeowners, bringing net expenses down to approximately £4,500-£5,500.

Several factors influence total installation costs. Property insulation levels determine system sizing requirements, whilst existing radiator configurations may need upgrading for optimal performance. 

Water-based underfloor heating systems achieve remarkable efficiency gains by operating at significantly lower temperatures than traditional radiators. Whilst conventional radiators require 70°C flow temperatures, underfloor systems work effectively at just 40°C.

This temperature advantage stems from the larger surface area that distributes warmth evenly across entire floor spaces. The radiant heat method eliminates cold spots and draughts, allowing comfortable room temperatures at lower thermostat settings.

Pairing underfloor heating with heat pumps creates exceptional efficiency, as both technologies operate optimally at reduced temperatures. Proper insulation beneath the system prevents downward heat loss, whilst stone or ceramic floor finishes conduct heat more effectively than carpeted surfaces, maximising the energy transfer to your living spaces.

So, in summary, there are many ways to reduce heating usage, increase heating efficiency, and ultimately save money.