Combi boiler installation in a Georgian Bath townhouse
Georgian townhouses come with tall party walls, awkward internal chimneys and B&NES conservation officers who care about flue outlets on front elevations. A combi can absolutely work — but flue routing needs planning, not just picking off a datasheet.
Where the combi actually lives
In a five-storey townhouse the boiler often ends up in a top-floor cupboard so the flue can terminate on a hidden rear pitch. That keeps the front elevation clean and shortens the condensate route. Pressure at the tap end depends on the incoming main — we test before we commit.
What we always plan for
- Flue route reviewed against conservation-area boundary
- Mains water pressure and flow tested at the stopcock
- Condensate route to nearest internal waste, not outside
- Existing microbore assessed before reusing
- Boiler sized for hot-water demand, not just heating load
Frequently asked
- Can I put a combi in a Grade II listed home?
- Usually yes, but any external flue on a listed elevation needs Listed Building Consent. We flag that at survey stage so nothing gets built and then failed.
- Will one combi run two bathrooms?
- A large-output combi will run a bath and a kitchen tap in sequence. If two showers run simultaneously, a system boiler and cylinder is the right answer instead.
- Is the mains pressure a problem in central Bath?
- Sometimes. We measure it with a static gauge before quoting; if it's marginal we look at a mains boost or move to a system + cylinder.
The next step
Send us photos of the meter, the current boiler, and any elevation the flue might exit. We'll walk you through the two or three realistic layouts before quoting.
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