Pros of combi boilers:
- Combi boilers are very energy-efficient, most produced with an efficiency rating of 90% or higher.
- Hot water is delivered at the same pressure as the mains, giving you a powerful hot shower without needing to have a shower pump.
- Their compact size means they save space at home; some combi boilers are small enough to fit inside a typical kitchen cupboard.
- It is possible to save money on installation, compared to other boiler types since no cylinder, and hence less pipework and shorter installation time.
Cons of combi boilers:
- They’re a little bit expensive to run for a large home with many bathrooms.
- A decline in water pressure is experienced If many appliances require hot water at the same time
- Combi boilers don’t have an extra immersion heater to heat water in the event of a breakdown