2 ms·
Mitsubishi units can still extract energy down to -13F / -25C: * https://www.mitsubishicomfort.com/benefits/hyper-heating https://www.mitsubishicomfort.com/ben
by throw0101a 6y ago
Mitsubishi units can still extract energy down to -13F / -25C:
* https://www.mitsubishicomfort.com/benefits/hyper-heating https://www.mitsubishicomfort.com/benefits/hyper-heating
These are designed in Japan, where they often have earthquakes, and so any flammable materials (natural gas) seem not to be used for heating. Things can get quite chilly up north:
* https://en.wikipedia.org/wiki/Rikubetsu,_Hokkaido https://en.wikipedia.org/wiki/Rikubetsu,_Hokkaido
* https://en.wikipedia.org/wiki/Hokkaidō#Climate https://en.wikipedia.org/wiki/Hokkaidō#Climate
AFAICT, the units do not have external thermometers, but rather look at the refrigerant temperature. So if the piping from the unit into your wall is short, then the refrigerant isn't exposed to the cold that much, and so may not effected as much by air temperature.
- fomine3 6y agoKerosene heater is common heating method than heat pump in Japan cold area. But nowadays heat pump increasing share because it gets efficient and kerosene heating is bad for air. Especially it's prohibited to use on better insulated house, and heat pump's power is enough for such house. I believe why natural gas heating is not popular is because they are a bit expensive and gas pipes aren't common outside big city. I'm getting curious why gas heating isn't popular even in big city (Sapporo). Your assumption (earthquake) looks reasonable for a part of reason. Maybe gas heater is hard to install/uninstall and never use except winter. So we don't want to put all year on small house is reasonable.
- maxerickson 6y agoNatural gas is imported into Japan on ships. It's relatively recent that it has been the inexpensive option in that scenario. And then gas does usually need ducting or radiators.