4 ms·

See didn’t know that :). Only that we are crazy in Germany not to put any ACs etc into our houses. I mean I don’t complain about my heating system. My house use

See didn’t know that :). Only that we are crazy in Germany not to put any ACs etc into our houses. I mean I don’t complain about my heating system. My house uses water based floor heating. I love it. Newest trend is to put it in the ceiling because the floor radiation tends to reach only the legs or some people feel it that way. But the summers can be rough.

Ballas 2y ago
The latest trend is to change your underfloor heating to a air-to-water heatpump system. In theory that can be used to heat and cool. They can also achieve very high SCOP values, meaning you need less energy. Air-to-air heatpumps (aircons that can heat and cool) have the downside that in heating, they disturb the boundary layer around a person, so the perceived temperature is lower. They also have a much more limited SCOP range - mostly because the delta temperature has to be higher. Edit: I forgot to mention - in some countries installing a heatpump that can also cool does not qualify for government subsidies - so many of them don't have that feature. This seems like a really short-sighted decision IMO.
- larusso 2y ago
  Yes your last edit is also a thing that baffles me. Heat pumps abilities are mainly advertised with heating applications. That they can run in reverse is too often missing.
  - nielsbot 2y ago
    I exclusively think of it in the reverse: An A/C that can also heat your home.
- _nalply 2y ago
  One problem of cooling floors this way is moisture. You'll get wet floors if you also don't use traditional air conditioning.
  - woleium 2y ago
    a system with a dew point sensor prevents this, but it does limit the effectiveness
  - Ballas 2y ago
    Yes, but as long as you keep it above the dew point, it's not an issue. You also don't want to cool it below that for another reason - it's unpleasant to walk on. The idea is that you design it so that you have adequate energy transfer with a minimum temperature delta. Then you don't have to go below dew point and the heat pump can run at a higher SCOP/SEER.

Ballas 2y ago

The latest trend is to change your underfloor heating to a air-to-water heatpump system. In theory that can be used to heat and cool. They can also achieve very high SCOP values, meaning you need less energy. Air-to-air heatpumps (aircons that can heat and cool) have the downside that in heating, they disturb the boundary layer around a person, so the perceived temperature is lower. They also have a much more limited SCOP range - mostly because the delta temperature has to be higher. Edit: I forgot to mention - in some countries installing a heatpump that can also cool does not qualify for government subsidies - so many of them don't have that feature. This seems like a really short-sighted decision IMO.

larusso 2y ago
Yes your last edit is also a thing that baffles me. Heat pumps abilities are mainly advertised with heating applications. That they can run in reverse is too often missing.
- nielsbot 2y ago
  I exclusively think of it in the reverse: An A/C that can also heat your home.
_nalply 2y ago
One problem of cooling floors this way is moisture. You'll get wet floors if you also don't use traditional air conditioning.
- woleium 2y ago
  a system with a dew point sensor prevents this, but it does limit the effectiveness
- Ballas 2y ago
  Yes, but as long as you keep it above the dew point, it's not an issue. You also don't want to cool it below that for another reason - it's unpleasant to walk on. The idea is that you design it so that you have adequate energy transfer with a minimum temperature delta. Then you don't have to go below dew point and the heat pump can run at a higher SCOP/SEER.