7 ms·
> Airflow based heat pumps are less efficient, and more noisy outside, of course. This is only true when the ambient temperature dips below the geothermal tem
by brtkdotse 5y ago
> Airflow based heat pumps are less efficient, and more noisy outside, of course.
This is only true when the ambient temperature dips below the geothermal temperature which depending on your location should make you prefer one over the other.
- jcynix 5y agoGermany. Where temperatures dip for some months below the geothermal temperature. Efficiency of air based pumps drops markedly when temperatures reach below 0 degrees Celsius. And last but not least: ground / water carries much more energy per volume unit than air does. So air based heat pumps would make more sense in Europe's south and less sense farther north.
- brtkdotse 5y agoModern water/air heat pumps have surprsingingly high efficiency down to -20C. We're running a 10 year old model that has no trouble heating our house down to -12, after which a direct electric helper element kicks in.