Hot-water systems · Combi boilerCombi boiler
Combi boiler
Hot water on demand.
A combi heats water from the mains as you use it, with no tank or cylinder. Good pressure, but the flow is shared if two taps run at once.
- Storage
- None
- Pressure
- Mains
- Showers
- Mixer or electric
- Watch
- Two outlets at once
What it is
A boiler that heats mains water instantly when a hot tap opens.
Good for
Pressure
Strong mixer showers without a pump.
Space
No cylinder or loft tank.
What to weigh up
Flow
Running a bath and a shower together can be weak.
Pumps
Power showers and pumps must not be used.
Planning around a combi?
Tell us about your room and what matters most, and we'll help you make the most of it.
Start your project briefIllustrations are concepts, not measured plans. Click any picture to enlarge it.