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Heat pumps don't have to be air-air pumps. Most commonly these days I hear people installing air-water heat pumps to replace gas furnaces that heat water for ra
by terryf 4y ago
Heat pumps don't have to be air-air pumps. Most commonly these days I hear people installing air-water heat pumps to replace gas furnaces that heat water for radiators or under-floor heating.
For new houses around here, ground-water heat pumps are actually most common as they are very efficient even if it's cold outside, but they require diffing up a large area to install the under-ground piping.
- wil421 4y agoMy wife’s uncle has large pond outside his house and wedding venue. He has two units. One closed and one that directly draws the water. The closed unit has half a mile of coils sunk in the pond. He says the open unit is more maintenance. His heating and cooling bills are not far off from my house. Considering he has 3 buildings similar sized to my house it’s a pretty drastic reduction.
- terryf 4y agoYeah, there are of course also water-air, water-water pumps (although I've never heard of the open-circuit ones, but yeah, why not). But you have to have access to a large enough body of water that doesn't freeze and has enough capacity. The main issue for me with air-X heat pumps is that over time it can start to make a lot of noise if not well maintained. But the closed-circuit under-ground (or under-water) ones essentially don't need maintenance and are incredibly efficient, as the source never goes very cold.