Re:You and the planet need a heat pump
by arpinum on Sunday March 20, 2022 @06:20PM
(#30747298)
Modern heat pumps, for example by Mitsubishi and sold in the UK, maintain a COP > 2.5 at -7C.
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Re:You and the planet need a heat pump
by earleybird on Sunday March 20, 2022 @07:27PM
(#30747911)
If you have more details I'd certainly appreciate it. We're running a now 25 yr old whole house forced air system - 4 ton. Fuzzy memory but as I recall it probably has a CoP of around 16 with defrost cycles when the temp goes below +5C. It has been mostly maintenance free for those 25 years excepting on time when it started icing up - needed a recharge of refrigerant as it seemed to be a bit low - tech figured a slow leak somewhere but never found it.
The system works fine and my best guess is that it is somewhere around 3:1 in favour of heat pump over resistive heat (electric baseboard or radiant panels).