I have four of them spread out throughout the house as a proof of concept test. Even at -47, with a broken furnace, I was able to keep the house at 65.

My summer project will be to discard the old furnace, install two s19’s with AC Infinity fans into the ducting, and start designing a hot water system with a s19 XP Hydro.

So next winter when it gets cold like that again, I’ll be heated by 450Th/s.