How flue routing affects the scope of an installation

Things worth knowing about flue routing

• Flue length depends on boiler position relative to a suitable external wall
• Clearance rules near boundaries or openings can rule out the nearest wall
• Longer or more complex routes add material and labour time
• Vertical flue routes through a loft are an alternative where horizontal routes fail
• Existing chimneys are sometimes an option, assessed separately at survey

How we read flue routing on site

Where a boiler is sited close to an external wall with clear access, the flue run is typically short and direct. Where the boiler sits deeper in a building, or clearance rules rule out the nearest wall, the flue may need to travel further, sometimes through additional rooms or up through a loft space to reach a suitable termination point, which adds material and labour to the job.

Where we deal with this

• Winford (BS40) · 10 mi
• Broughton Gifford (BA14) · 11 mi
• Calne (SN11) · 15 mi
• Twerton (BA2) · 7 mi
• Freshford (BA2) · 7 mi

Questions we get asked

Can I choose any boiler position I like?

Position needs to allow for a compliant flue route, which is checked as part of the survey before a position is confirmed.

Does a longer flue affect boiler performance?

Flues are designed within manufacturer length limits, so a compliant longer run should not affect performance.