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Originally Posted by nomadking
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37°C is body temperature, ie lukewarm. A person will output more heat than that, mainly by breathing out of warmer air.
The heat pumps that are used in Norway heat the air, not a tank of water.
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I once lived in a house that had a central heating system that relied on the warm air being distributed to the rooms.
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You may want to try using sources that aren’t 10 years old. I’m heading out shortly so no time, but suffice to say that modern installations need not provide 40*c at the cylinder. They can reach 50*c with an adequately sized cylinder, or 60*c or higher if you add an additional pump inside the house to convert room heat to hot water.
With a heat pump it’s never about whether it can or can’t ‘do’ something. It almost always can. It’s always about the systems installed to manage heat storage, distribution and retention in the home.
The means by which heat is delivered to houses from Norwegian heat pumps is irrelevant to my point - they work, and they continue to work at far lower external temperatures than most of us experience in the UK. The reason people in the UK think they don’t is because our houses are appallingly badly insulated. That’s why warm air ducted heating was only ever a passing fad in the UK, almost invariably replaced by wet radiators after the system became life-expired. If your house is draughty, full of open flues (or badly sealed ones) and with inadequate wall insulation, then the warm air fed through the system is too quickly lost to the outside.