Discuss combi used as a system boiler in the Plumbing Jobs | The Job-board area at PlumbersForums.net

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Billy Bob Bob

never done this but as long as i run the hot outlet to at least 1 tap i cant see any reason why i cant use a combi as a system boiler?
 
Never seen it done.

But you can definitely do it on an intergas boiler.
 
my thoughts are tom if you can zone a combi,which i have many times its no different fitting a y plan system and using it as a system set up as long as you use one outlet for dhw from the boiler
 
never done this but as long as i run the hot outlet to at least 1 tap i cant see any reason why i cant use a combi as a system boiler?

It is the set up we have here. I have a WB which was a quick fix years ago but now have is S planned. Still combi hot to kitchen sink and downstairs loo.
 
never done this but as long as i run the hot outlet to at least 1 tap i cant see any reason why i cant use a combi as a system boiler?

Why would you need to run any hot at all? I've never done it, but have heard of it being done and always assumed that was how people did it.
 
never done this but as long as i run the hot outlet to at least 1 tap i cant see any reason why i cant use a combi as a system boiler?
Course you can Mark done a few as combi was higher output and cheaper than system etc
 
what about electric control on pcb. probably you would need to close some jumpers not to switch to dhw. just assumption :)
 
Why would you need to run any hot at all? I've never done it, but have heard of it being done and always assumed that was how people did it.

You don't need to have a hot run but it makes sense for occasional use. We have our timer set to have hot water in the evening. If I need to sort my mucky mits during the day there is no cylinder draw off and theoretically better economy.
 
You don't need to have a hot run but it makes sense for occasional use. We have our timer set to have hot water in the evening. If I need to sort my mucky mits during the day there is no cylinder draw off and theoretically better economy.

Good point, well made! Might as well use it if it's there...
 
I have always thought it was a good idea as it can be cheaper for a combi over a system just have to be careful on electrics as some combis 24v switching on heating so zone valves are the way forward!
 
Course you can Mark done a few as combi was higher output and cheaper than system etc
my thoughts as well a megaflow 32 system is 100 quid less than a potterton titanium 40 combi,megaflow 2 year warranty titanium 7 years so 5 years for a hundred quid more
 
I have done it a couple time. I have always put the kitchen sink and/or utility room sink on the combi side of things and stored water for bathrooms etc.
 
my thoughts as well a megaflow 32 system is 100 quid less than a potterton titanium 40 combi,megaflow 2 year warranty titanium 7 years so 5 years for a hundred quid more
Just done one the same as I system 5 year warranty and combi 7 year got a good deal on the combi and the old boy always wanted an hot outside tap lol, got me the job! And him what he wanted and a 7 year warranty to boot!
 
my thoughts as well a megaflow 32 system is 100 quid less than a potterton titanium 40 combi,megaflow 2 year warranty titanium 7 years so 5 years for a hundred quid more

Warranty will be void unless you have at least one outlet running off the boiler
 
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