Combi Boiler vs System Boiler | Boilers | Plumbers Forums

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Discuss Combi Boiler vs System Boiler in the Boilers area at Plumbers Forums

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I think the last discussion was back in 2021.

A few questions to guide any discussion.

Which are the cheapest to heat over the year, system or combi in an average 3/4 bed property?

Which will be the more reliable and cheapest boiler type to repair over the next 10 years?

Is there a better boiler type thats not been covered in the title?

Thanks
 
Combi boiler will only reliably do one bathroom

Heat only for me
 
How do you keep the system clean from sludge? Do you have a system filter?

Just make sure air doesn’t get in corrosion won’t happen unless air is present
 
Hi, I sought advice here a few years ago, to decided whether I should keep my traditional systems boiler (with cylinder) or upgrade to a combi boiler (deemed more efficient)
Whilst my habits have not changed, my gas bill consumption went from 2100Kw/year to 4300kw/year
it's been a huge mistake to go towards a combi boiler. when you factor in the price increase of gas on top, you can see how much of a financial mistake this has been!
 

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