Combi boiler NOT recommended-Why?

Thank you to everyone for the help and advice.
The plan now is to get British Gas back in to put the system on a maintenance cntract.
Thanks to everyone :D
Dave
 
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wont be a powermax as they use a twin flue. The description is a proper vertex, we have a whole estate of myson economists with em.

Power max can also be piped like the vertex system

Has your son thought about an unvented cylinder and a system boiler?
 
I like combis. If your cold main is not of very high flowrate, there is no point in fitting an unvented cylinder, because the main will not supply the extra water flow to justify it.

A combi will produce a bathfull in 5-6 minutes, and you can then draw more hot water at once. True, it will only supply one tap at a time.
 
I like combis. If your cold main is not of very high flowrate, there is no point in fitting an unvented cylinder, because the main will not supply the extra water flow to justify it.

A combi will produce a bathfull in 5-6 minutes, and you can then draw more hot water at once. True, it will only supply one tap at a time.

dependant on which combi you have that it is. Why do you say you may only run 1 tap at a time\?
 
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A government standard bath is 230 litres.

For a combi to fill that in 5 minutes would need a flow rate of 42li/min heated from the incoming of say 5° to say 42°.

Not many combis will do that.

A combi will supply any number of taps but the dflow rate has to be shared between them so most will become useless if another is in use with any significant flow rate.

Tony
 

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