> That said there is a difference between mini-split and something you hook up to internal ducting where your furnace used to be and prices have increased in th

> That said there is a difference between mini-split and something you hook up to internal ducting where your furnace used to be and prices have increased in the meantime. Generally true, as the mini-splits (have) tend(ed) to operate down to lower temperatures, but the heat pumps that look like 'traditional' outdoor A/C units are getting down there as well: for example this Lennox unit can work down to -4F / -20C: * https://tech.lennoxintl.com/c03e7o14l/viu12ch2uv/ehb_sl25xpv_2109.pdf https://tech.lennoxintl.com/c03e7o14l/viu12ch2uv/ehb_sl25xpv... That'll provide pretty good coverage of the year in many parts of North America before something like a gas furnace needs to kick in. (Speaking as someone who lives in Canada.)