System swap
Thermal store to combi conversion — Somerset
Thermal stores were popular in the 90s and early 2000s. Twenty years on, the plate exchangers scale, the pumps whine, and the hot-water performance is a fraction of what a modern combi delivers.
For: Homeowners with a 90s thermal store or open-vent system
Why the swap is usually a big win
You get rid of the store, the plate exchanger, the loft tank, and gain mains-pressure hot water. Space in the cupboard comes back, and running costs drop meaningfully.
The swap covers
- Thermal store drained, disconnected and removed
- Loft tanks decommissioned
- Gas run reviewed and upgraded if under 22mm
- Combi sized on hot-water demand, not old kW
- Full flush, filter and inhibitor before commissioning
Frequently asked
- Will one combi handle two bathrooms?
- A large-output combi (40kW+) will run a shower and a tap. For simultaneous two showers, a system boiler and unvented is better.
- What about the space where the store was?
- It becomes usable cupboard space. Some clients turn it into a utility cupboard or extended airing cupboard.
- How long is the install?
- 2 days typically — the store removal is the bulk of the work.
Book the survey
Send photos of the current thermal store and loft. We'll come back with a combi pick and a two-day install price.
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