Cold House? How to Heat Your Home More Efficiently UK 2026
Persistent cold rooms usually combine heat loss, poor controls, circulation issues, or undersized heat emitters. This 2026 UK guide prioritises practical fixes in the right order.
Insulation and Draughts
Loft and wall insulation, curtains, and draught proofing often deliver the biggest comfort gains per pound.
Controls and Setpoints
Check schedules, TRVs, balancing, and thermostat placement. Avoid heating unused spaces excessively.
Boiler and System Health
Low pressure, sludge, airlocks, and pump issues reduce heat delivery—service and cleaning may help.
Emitter Sizing
If radiators are undersized for the room heat loss, the house can feel cold even when the boiler runs.
Get the Right Boiler Size for Your Home
Our free boiler size calculator uses your property details, radiator count, insulation and hot water needs to recommend a suitable kW range. No sign-up required—get results in seconds.
Use the Boiler Size CalculatorFrequently Asked Questions
Why is my house always cold?
Often insulation, controls, balancing, or emitter sizing.
Should I turn the boiler temperature up?
Higher flow temperatures can help short term but reduce efficiency on condensing boilers—fix root causes too.
Do I need bigger radiators?
Sometimes—especially after insulation upgrades or with heat pumps.
Is a bigger boiler the answer?
Not usually—oversizing can worsen cycling.
What should I do first in 2026?
Draught proofing, loft insulation review, then heating system checks.