3 ms·

I don't quite get why we insist on air/ground<->water systems, instead of just using aircon and heating the indoor air directly?

• dghughes 2y ago
  Heat pumps move heat they don't make it. Air source heat pumps are at least 300% to 400% more efficient than just electrical resistance heat. Ground-source heat pumps are even more efficient. All you do is use a bit of electricity to power a pump and some fluid to move heat around no need to burn things. Even better if the power comes from solar, wind, hydro, nuclear.
  • rkwasny 2y ago
    Aircon is a heatpump, it just directly heats the air without water in between.
    • difosfor 2y ago
      An AC doesn't pump air but liquid; not water, but still, it's indirect as well.
• phicoh 2y ago
  I'm not an expert, by dry air has a very low heat capacity. So you get a house with cold walls, floor and roof. And the dry warm air is rather ineffective in transferring heat to the walls, floors, etc. In contrast, if you have underfloor heating, you have a relatively large surface filled with warm water that heats up the floor. And then you have an even bigger surface that transfers heat to the rest of the house. In the end the house is more easy to heat because it doesn't depend on an airflow to reach all parts the house.