We have a Mitsubishi heat pump in a 1908 home. No backup. Coldest night so far was -16C here in Vancouver BC Canada. Handled the cold without issue.

That's impressive! I cannot believe how the technology has progressed since my 1963 model. As winters here in north Alabama have gotten significantly warmer over the last 40 years ever older units are using supplemental heat less. Most units sold here prioritize AC performance over heat.

I agree, the progress on cold climates technology is impressive. In Vancouver I passed a bylaw working with the Heating Refrigeration Air Conditioning Institute of Canada that requires all permanently installed AC to also heat, though AC is priority for many council.vancouver.ca/20220517/doc...

amazing! @energysmartwv.bsky.social would approve 😝

He borrowed my idea lol. He’s presented out at once, and I’m gonna have them on again soon on the hybrid heating call. The title was stealing good American ideas and actually implementing them.

I love it

It's true! I took the idea from Nate and I would do it again!

That's great. The 1963 model that was in the house we bought in 1979 was reverse cycle (did both AC and heat) and almost every heat pump here has always been for both AC and heat. But my neighbor has a Bosch unit with 7.8 energy efficiency for heat and 15.2 for cooling that is amazing.

The new heat pumps are sooo much better in cold weather than old ones. Heat strips on a slightly cheaper heat pump can still make sense. Here in central PA they tried to sell me backup propane but I opted for heat strips instead with solar this costs me ~$40/year, not worth the issues of backup gas.

That truly is very impressive. I can remember 10 to 14 degree nights when heat strips would come on frequently. Now, though we don't get the cold weather like we did in the 60s and 70s and that also helps. I wonder how the heat pump hot water heaters do?

They're amazing, particularly for the south. I have one here in PA and it makes the basement room it's in uncomfortably cold in winter, but wonderful in summer. If I was in the south I'd just duct it to blow cold into the living or bed room then click to switch it to resistance heat mode in winter.

That's really great! They've made a lot of progress with heat pumps. My first one was so old it had relay logic, integrated circuits ("chips") had not been invented yet. My neighbor just put in a Bosch unit that has a variable speed compressor with a heating ER of 7.8 and cooling of 15.2.