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For a village hall, do you see any advantage other than environmental, in using a heat pump rather than gas for space heating, when Electricity is 24.847p per kWh and Gas 5.838p per kWh, both excluding CCL and VAT?

AncientMariner

We have been advised to consider a replacement gas boiler. The current one was fitted circa 2004 and has a 100 kW output (120 kW input). The situation is not helped by it being a large diameter pipe system and cast iron radiators, likely original from when the Class II listed building was built very early 1900s.  (Some of the joints appear to be caulked lead!)

Clive

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    Is the heating demand really in the region of 100 KW  ? That seems an awful lot unless the premises are a lot larger than most village halls.

    A decent heat pump should have an average COP of at least 3, but could reasonably drop to 2 in cold weather. Therefore to produce 100 KW of heat in cold weather will require 50 KW of electricity. Presuming a guess at the other loads, that suggests a MINIMUM Supply of 3 phase at 100 amps. Any significant electric cooking, or a decent stage lighting set up could push that to 3 phase at 160 amps or even more. Is this available ?

    P.S. I doubt that the joints in the heating pipes are actually caulked lead. More likely to be "rust joints" A relatively loose fitting joint in which the gap was filled with a paste containing a mixture of Sal Almoniac and iron fillings. When first erected, such joints tended to leak but soon became strong and watertight, as the iron fillings rusted and increased in volume.

  • 0 in reply to broadgage
    broadgage said:
    When first erected, such joints tended to leak but soon became strong and watertight, as the iron fillings rusted and increased in volume.

    Fascinating! Rust normally equals leaking.

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