Boiler service advice

Practical guides to keep your boiler servicing on track and avoid costly surprises.

April 29, 2026

What Size of Boiler Do I Need? A Simple 2026 UK Guide

A lot of homeowners ask what size of boiler do i need when the old one starts making noises, the hot water turns unreliable, or a quote lands with a boiler size that means nothing to them. Most aren’t really asking about the box on the wall. They’re asking whether the new boiler will keep the home warm, cope with showers, and avoid wasting money. That’s where sizing matters. A boiler that’s too small struggles on cold days. One that’s too large can switch on and off too often, which instal

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