9 ms·
I believe you are correct. Below 6' the earth is consistently 55ish degrees. Even with perfect/fast transfer of heat that would mean the max winter temp of your
by DubiousPusher 10y ago
I believe you are correct. Below 6' the earth is consistently 55ish degrees. Even with perfect/fast transfer of heat that would mean the max winter temp of your house would be 55 (since it's often colder than that there.) Of course given perfect/fast transfer of heat, it would work wonderfully in the summer. But I assume there are pretty significant limitations in how quickly a body of 55 degree water can cool a 90 degree house. Which is also a common summer temp there.
- jwilk 10y agoTranslation for SI users: 6' ≈ 1.8 m 55 °F ≈ 13 °C 90 °F ≈ 32 °C
- WalterBright 10y agoIf the air temp is below 55, you use the ground to heat it to 55, then other means to heat it the rest of the way.
- ZeroGravitas 10y agoAre we talking heat pumps or a different passive heat exchanger system? Air-con/heat-pumps/refrigerators can extract heat from surprisingly cold sources as long as there's enough of them e.g. the city of Dremmen that extracts heat from the near freezing North Sea to heat water to near boiling point. The original claim of a 30% saving seems like the jump from from air source to ground source heat pumps which are often quoted as giving back 3x or 5x the energy put in, respectively.
- rhino369 10y agoDon't furnaces pull in air from the already warm house?
- WalterBright 10y agoA percentage. They also pull air in from outside to freshen the air inside.