anyone had any experience of the air heat pumps. seems a good energy saving method and easier than ground source.
Solar has no living payback
Thats what I like about Viessmann, they are happy to tell it as it is without making any wild and unsubstanciated claims
Solar has no living payback
Recovered heat !
is not modulatable yet so its either on or off
The efficiency falls dramatically as the air/heat source temperature falls towards zero.
Its very difficult to recover heat from below 0°C as freezing on the heat exchanger is likely.
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