Boiler efficiency

Tim Lamb · 2022-01-17T10:09:15+00:00

With the current interest in energy prices, would this be an appropriate time to discuss boiler settings?I think we all understand the linked concepts of building insulation, ventilation and thermostat settings but what impact do actual boiler settings have on overall consumption?For example, modern condensing system boiler supplying thermal store and underfloor piped system.Boiler max temperature has to exceed that required for hot tank safety. 60deg. C plus feed pipe losses plus a consideration for thermal transfer from the heating coil.The underfloor heating requires a maximum of 50 deg. C regulated by valves at the manifolds.In my case, with 24 hour occupation, the boiler feeds the manifolds when it is not topping up the thermal store.As a consequence it runs almost continuously on the lowest flame setting at 70C+. When the tuits are gathered, I intend to fit *weather compensation* (exterior thermistor) which should allow lower boiler settings for room heating.How critical is this and is there any benefit in reducing the *heating on* period to load the boiler more heavily?

Jan 17, 2022 Last reply: 4 years ago 21 Replies

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Tim Lamb 4 years ago

Not here. This is W plan.

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John Rumm 4 years ago

IME the contents of a vented system F&E tank don't usually get hot enough to get in any way sanitised. Your best hope is that the mould and bird droppings and CH system inhibitor will kill any other pathogens :-)

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