Originally posted by mtmcgavock
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Intergas & Evohome
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All I can say is, 38Kw was correctly sized if I had a traditional radiator only system. But like I said, the conversions from radiators to UFH and the zoning possible with Evohome has meant that a smaller boiler could do. I wish I knew then what I know now, to challenge my plumber at the time, who knew absolutely nothing about Evohome. Anyway, we live and learn.
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Originally posted by G4RHL View PostAm not convinced about this. A couple of colleagues thought 28kw was fine for their 4 bedroom detached properties and found it inadequate, particularly in the winter months when perhaps two showers were in action. One changed it for 32kw and problem was solved. Most sites I have looked at are suggesting 32kw to 38kw for a 4 bedroom detached property.Originally posted by bruce_miranda View Post@G4RHL, I think you might be confusing the heat output needed from a Combi versus a Heat only stored HW.
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Originally posted by mtmcgavock View PostOn another note, if you have a 4 bed house, have 2 or more bathrooms and want to run two showers at once ideally you should be looking at a System Boiler and Unvented Cylinder. A combi will never be a good solution.
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Originally posted by bruce_miranda View PostAll I can say is, 38Kw was correctly sized if I had a traditional radiator only system. But like I said, the conversions from radiators to UFH and the zoning possible with Evohome has meant that a smaller boiler could do. I wish I knew then what I know now, to challenge my plumber at the time, who knew absolutely nothing about Evohome. Anyway, we live and learn.
Whilst writing, in response to another posting, yes the boiler will be for HW and CH, hence something 32kw and above.
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Originally posted by bruce_miranda View PostI too was going to say that but I am not qualified. in my case my plumber made the assessment that even a system boiler would not be ideal, so suggested a Heat Only sealed system with a Sealed DHW cylinder, so that a bigger compression tank and larger pump could be installed.
Also if you have a Low Loss Header the pump is then within the boiler, so no additional pump needed from the boiler to the LLH.
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My old Baxi has just been serviced (apparently running at 90% efficiency!) and the service engineer who comes every year and in the past recommended Intergas as replacement this time advised against them. He says they have had 5 failures in recent times with customers with things like seals melting and it seems there are some issues with models released in the last couple years. I am aware in this forum there are Intergas users and installers. Anybody getting similar experiences or know of these issues?
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