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Gerard17
Did any1 no that a a normal gas boiler heats a rad 30% more than on a condensing boiler. Has any1 ever fitted a new boiler like a combi swap an the customer says the house isn't has hot?
Discuss Less heat in a condensing boiler in the Plumbing Jobs | The Job-board area at PlumbersForums.net
no,never have had that issueDid any1 no that a a normal gas boiler heats a rad 30% more than on a condensing boiler. Has any1 ever fitted a new boiler like a combi swap an the customer says the house isn't has hot?
Correct 55 not 50 ....hence on WB,Vaillants etc, max flow is 75 degs ( unless you override it) balance to get your 20 deg diff, return stays at 55 degs so boiler stays in condensing mode, until SYTEM cannot dissipate any more heat evenafter modulating down, then diff drops, return temp goes up, boiler stops condensing...So if the return is above 50 degrees the boiler doesn't condense
A properly sized boiler AND RADIATORS means that should never happened.
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