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Air Sourced Heat Pump.

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A person today that I was talking to, that has had a new build home which was required by building regs. to have an air sourced heat pump for heating and hot water, complained that the system was slow to heat or cool as required. He said that he had to have underfloor heating installed. It was slow to warm the rooms on cold days. He recently had the system set to cool the rooms on the very hot recent days. But this morning was cooler and he required heating. Is this normal?


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    davezawadi (David Stone):

    ... we need to calculate the thermal mass of the entirety of the property. The air volume is some of this, but much more is the bricks in the walls, the wood, the plaster, etc, which will be several tonnes of materials of various thermal capacity.


    I have noticed this from time to time, but most noticeably when the "Beast from the East" blew for several days in winter a few years ago. It cooled the bricks on the eastern side of the house where my office is situated to such an extent that the normal operation of the central heating, supplemented by a coal fire, was insufficient to get the air temperature above 55°C.


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  • 0
    davezawadi (David Stone):

    ... we need to calculate the thermal mass of the entirety of the property. The air volume is some of this, but much more is the bricks in the walls, the wood, the plaster, etc, which will be several tonnes of materials of various thermal capacity.


    I have noticed this from time to time, but most noticeably when the "Beast from the East" blew for several days in winter a few years ago. It cooled the bricks on the eastern side of the house where my office is situated to such an extent that the normal operation of the central heating, supplemented by a coal fire, was insufficient to get the air temperature above 55°C.


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