Yes, it’s an older H2i model and is at my folks camp, which is poorly insulated and was somewhat undersized. I think that generation H2i had a hard shut-off at -13F or -15F. My current house is super well insulated and the Fujitsu compressor is appropriately sized for the four inside heads, and the heat/cool load of the house. I have no doubt it would keep my place comfy in this weather, just at a high electric usage rate. I burn wood as it’s cheaper and my wood stove is modern.