They work basically unimpaired into zone 4b, which includes all of northern Michigan. This encompasses something like 95% of the entire human population.
They will need some support on the coldest days in up to zone 2b, at which point their efficiency drops to a mere 100%.
You’re spreading fossil fuel industry FUD. Fuck off.
They work basically unimpaired into zone 4b, which includes all of northern Michigan. This encompasses something like 95% of the entire human population.
They will need some support on the coldest days in up to zone 2b, at which point their efficiency drops to a mere 100%.
You’re spreading fossil fuel industry FUD. Fuck off.