System Boiler Installation Cost

System Boiler Installation Cost Guide

A system boiler installation typically costs between £1,400 and £3,200 depending on the boiler model and whether a new hot water cylinder is required.

What's Included

• New system boiler supply and fit
• Hot water cylinder (if required): £300–£600 extra
• Flue, controls, and filter
• Gas Safe certificate

System vs Combi Cost Comparison

System boilers cost more upfront than combis because of the separate hot water cylinder. However they're better suited to larger homes with higher hot water demand and can be more efficient long-term.