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I dunno. My mom’s heating bills in Indiana using heat pumps with auxiliary electric heaters was >$700 month at electricity costing 11c/kwh. I live in Massachuse

I dunno. My mom’s heating bills in Indiana using heat pumps with auxiliary electric heaters was >$700 month at electricity costing 11c/kwh. I live in Massachusetts where my electricity cost 33c/kwh. So if I used my mom’s heater to heat a house of similar size, my heating bill will be $2k/month. My heating gas bill is under 120/month. I understand a bulk of that cost comes from the aux resistive electric heater. But for really cold places, that’s needed when the heat pump can’t keep up or you need to rapidly warm the house. As is, we are still quite far from heat pumps being cost efficient as gas for places that get really cold

valenterry 3y ago
I don't think so. Check those measures for some example heatpump: https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/196539762 https://www.eurovent-certification.com/en/catalog/program/ce... They are not from the manufacturer but from an independent service that is used by various states that are members of the eu. As you can see, at -7 degrees celsius, the COP is still almost 4. So even at that temperature, this heatpump is still about twice as afficient as burning gas directly. Of course, it depends on the correct installation. It's easier to screw up the installation of a heat pump than a gas heating system. But it doesn't invalidate the theoretical bounds.
- naijaboiler 3y ago
  Keep talking theoretical bounds, while I post real, not theoretical, dollars
  - valenterry 3y ago
    Yeah I get what you are saying. And sure, if the installation or usage is suboptimal then you won't get high efficiency. And it's also true that it's much easier to use a heatpump wrongly compared to e.g. gas heating. On the other hand it's also not black magic and the more people install and use it, the less mistakes will be made.

valenterry 3y ago

I don't think so. Check those measures for some example heatpump: https://www.eurovent-certification.com/en/catalog/program/certificate/participant/model/show/196539762 https://www.eurovent-certification.com/en/catalog/program/ce... They are not from the manufacturer but from an independent service that is used by various states that are members of the eu. As you can see, at -7 degrees celsius, the COP is still almost 4. So even at that temperature, this heatpump is still about twice as afficient as burning gas directly. Of course, it depends on the correct installation. It's easier to screw up the installation of a heat pump than a gas heating system. But it doesn't invalidate the theoretical bounds.

naijaboiler 3y ago
Keep talking theoretical bounds, while I post real, not theoretical, dollars
- valenterry 3y ago
  Yeah I get what you are saying. And sure, if the installation or usage is suboptimal then you won't get high efficiency. And it's also true that it's much easier to use a heatpump wrongly compared to e.g. gas heating. On the other hand it's also not black magic and the more people install and use it, the less mistakes will be made.