Optimise a condensing boiler’s heating flow
Why this can help
A suitable lower radiator-circuit flow temperature can improve condensing-boiler efficiency. Controlled house experiments support the mechanism; real-world advice trials measured a different, smaller average effect.
One possible next step
Identify the radiator-circuit control in the manual and seek qualified advice if the system is unclear.
What changes the outcome
Distinguish space-heating controls from stored domestic hot-water settings. Follow the appliance and system guidance and retain comfort. Neither a laboratory percentage nor the effect of an advice campaign is a guaranteed household saving.
The action
One possibility
Using a higher heating-flow setting than necessary
Another possibility
Choosing a compatible setting that maintains comfort
A suitable lower radiator-circuit flow temperature can improve condensing-boiler efficiency. Controlled house experiments support the mechanism; real-world advice trials measured a different, smaller average effect.
Identify the radiator-circuit control in the manual and seek qualified advice if the system is unclear.
Sources and calculation references
- Nesta / University of Salford — Boiler flow temperature testing (2022)Nesta / University of Salford · 2022
- Nesta — Boiler optimisation advice RCT (2023)Nesta · 2023
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