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> They’re so efficient and work well at low temps now. Can someone provide me model numbers for these heat pumps that “work well” at low temperatures? I’ve be

by xienze 4y ago

> They’re so efficient and work well at low temps now. Can someone provide me model numbers for these heat pumps that “work well” at low temperatures? I’ve been through more than a few over the decades and currently have a Trane from last year and yep, still doesn’t hold up very well once the temperature hits freezing. Don’t get me wrong, I like heat pumps, but my eyes roll into the back of my skull when I hear over and over again that they’re “so efficient now” at low temperatures.

jonstewart 4y ago
Fujitsu XLTH: https://www.fujitsugeneral.com/us/residential/technology/xlth-low-temp-heating.html https://www.fujitsugeneral.com/us/residential/technology/xlt... Mitsubishi Hyper Heat and H2i Plus: https://www.mitsubishicomfort.com/articles/what-is-a-heat-pump https://www.mitsubishicomfort.com/articles/what-is-a-heat-pu... Efficiency with these heat pumps severely decreases when temps go below 0F, but they still produce heat. Their sites are admittedly not all that clear. GreenBuildingAdvisor.com has a ton of useful info on it, like https://www.greenbuildingadvisor.com/question/cold-weather-performance-reports-from-minisplit-owners https://www.greenbuildingadvisor.com/question/cold-weather-p....
oittaa 4y ago
If you actually live in an area where temperatures drop below -30C regularly, you might want to consider a ground source heat pump. They are a bit more expensive than the typical air source heat pumps since there's some digging involved, but for a new house they aren't that much more expensive since there's already digging for electricity, plumbing, etc. For example ground source heat pumps are getting quite popular in Finland.
- xienze 4y ago
  Who’s talking about -30C? I’m talking about 32F, or 0C. I’ve yet to be impressed by a heat pump once the temperature gets at or especially below freezing. Geothermal heat pumps are great but at least in the US they are wildly expensive compared to traditional ones. You either need a large lot for horizontal laying of the pipe or a DEEP hole if going vertical ($$$). Plus they’re uncommon enough that contractors are happy to charge a serious premium.
nuclearwast 4y ago
this was installed in my home to replace a oil furnace (air heating) https://www.gree.ca/products/ducted-central-heat-pump?variant=31402415915145 https://www.gree.ca/products/ducted-central-heat-pump?varian... I am not sure if it's available outside of canada though.

by xienze 4y ago

jonstewart 4y ago

Fujitsu XLTH: https://www.fujitsugeneral.com/us/residential/technology/xlth-low-temp-heating.html https://www.fujitsugeneral.com/us/residential/technology/xlt... Mitsubishi Hyper Heat and H2i Plus: https://www.mitsubishicomfort.com/articles/what-is-a-heat-pump https://www.mitsubishicomfort.com/articles/what-is-a-heat-pu... Efficiency with these heat pumps severely decreases when temps go below 0F, but they still produce heat. Their sites are admittedly not all that clear. GreenBuildingAdvisor.com has a ton of useful info on it, like https://www.greenbuildingadvisor.com/question/cold-weather-performance-reports-from-minisplit-owners https://www.greenbuildingadvisor.com/question/cold-weather-p....

oittaa 4y ago

If you actually live in an area where temperatures drop below -30C regularly, you might want to consider a ground source heat pump. They are a bit more expensive than the typical air source heat pumps since there's some digging involved, but for a new house they aren't that much more expensive since there's already digging for electricity, plumbing, etc. For example ground source heat pumps are getting quite popular in Finland.

xienze 4y ago
Who’s talking about -30C? I’m talking about 32F, or 0C. I’ve yet to be impressed by a heat pump once the temperature gets at or especially below freezing. Geothermal heat pumps are great but at least in the US they are wildly expensive compared to traditional ones. You either need a large lot for horizontal laying of the pipe or a DEEP hole if going vertical ($$$). Plus they’re uncommon enough that contractors are happy to charge a serious premium.

nuclearwast 4y ago

this was installed in my home to replace a oil furnace (air heating) https://www.gree.ca/products/ducted-central-heat-pump?variant=31402415915145 https://www.gree.ca/products/ducted-central-heat-pump?varian... I am not sure if it's available outside of canada though.