Home Improvement
What Size Boiler Do I Need? UK Sizing Guide
On November 8, 2026 by swllwheatinThe short answer: a combi is sized by hot water, a system boiler by heating Most boiler sizing advice starts in the wrong place: the number of bedrooms. Bedrooms are a rough proxy, but the number that actually decides the size is different depending on the boiler type. A gas-fired wall-mounted boiler, used for heating […]
