Central Heating Question

Boiler recommendation

Is a combi boiler ever enough for a house with 2 showers? There seems to be a massive debate online. Does anyone have experience of, for example, whether a Valliant 937 copes with this situation (which is often the one recommended, tho I'd be interested in hearing of others). I understand that it also depends on mains pressure to the house - what would be a minimal pressure for a COmbi to cope with 2 showers?

Does a thermostatic shower overcome some of these problems? i.e. can it respond fast enough to another draw on the HW supply, so that the temperature doesn't drop (although of course the pressure will)?

Any advice much appreciated...

3 Answers

hi, if your after a combi for 2 showers a worcester highflow 440 is an option as it has ahigh flow rate on hot water (20 ltr/minute) depending on mains pressure. other option is unvented hot water but again depends on mains pressure. hope this helps adrian

Answered 8th Jul 2011


Member since 28 Jun 2008

I agree with A.D.Johnson the Highflow would be a good choice it will provide you with the flow rate you need (similar to a Mega flow) and also has a useful little hot water store to help with immediate demand, really handy in Summer when the heating is off.
Good luck, hope you find this helpful.

Answered 11th Aug 2011


Member since 22 Nov 2010

They are both a waste of money if the incoming water main will not give enough flow of water or pressure

Answered 11th Aug 2011

Paul Caton Gas Services

Member since 23 Mar 2010

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