How to Save Money on Heating Bills

Heating bills can feel painful in winter, but many of the best savings come from simple changes: better boiler settings, smarter controls, and low-cost insulation improvements. This UK guide covers practical, high-impact ways to reduce heating costs, plus a quick overview of grants and schemes that can help with upgrades.

Optimise Boiler Flow Temperature

For condensing boilers, lower flow temperatures can improve efficiency by keeping the boiler in condensing mode. Many UK homes can run at a lower flow temperature (especially in mild weather) while staying comfortable. If radiators struggle to heat rooms, increase gradually.

Use Smart Controls (or Use Your Existing Controls Better)

Set realistic schedules: Heat only when you need it, and avoid leaving heating on all day if rooms are empty.
Use TRVs: Lower unused rooms and keep living areas comfortable.
Reduce the setpoint slightly: Even a small reduction can cut costs without making the home uncomfortable.

Improve Insulation and Draught Proofing

The cheapest heat is the heat you don't lose. Loft insulation, draught proofing, thick curtains, and sealing gaps around doors and windows can make a noticeable difference. If your home has uninsulated cavities or older glazing, larger upgrades can provide bigger savings.

Maintain Your Heating System

A well-maintained boiler and clean heating system can run more efficiently. Annual servicing helps catch issues early, while system water treatment (inhibitor) and filters can reduce sludge problems that limit circulation.

Check Help Available: Grants and Schemes

Depending on eligibility, UK households may be able to access support for insulation and heating upgrades. Schemes can change over time, so it's worth checking current criteria and approved installers before committing to work.

Get the Right Boiler Size for Your Home

Oversized boilers can short-cycle and run less efficiently. Our boiler size calculator recommends a sensible kW range based on your home and hot water demand—use it before you compare quotes or plan an upgrade.

Use the Boiler Size Calculator

Frequently Asked Questions

What's the quickest way to reduce heating bills?

Start with controls and settings: set a sensible schedule, reduce the thermostat slightly, and make sure rooms aren't being overheated. Draught proofing also provides fast wins.

Does lowering boiler flow temperature save money?

It can, especially for condensing boilers, because lower flow temps can improve efficiency. The right setting depends on your radiators and heat loss—adjust gradually and monitor comfort.

Are smart thermostats worth it?

They can be if they help you heat less without sacrificing comfort (better scheduling, remote control, optimisation). Savings depend on how you use them and your home's insulation.

What insulation upgrades give the best return?

Loft insulation and draught proofing are often high value. Cavity wall insulation can also help if your property is suitable. Larger upgrades like windows can improve comfort but cost more.

Can boiler servicing reduce heating costs?

Servicing helps keep the boiler running safely and can prevent issues that increase gas use. It also reduces the risk of breakdowns and may be required to keep warranties valid.