It's not much colder there than here in Calgary. Most units set up correctly here will run longer on low with more CPH unless coming off a setback.
some years maybe..last year warm winter ... only -20C
W1 is all that most furnaces need since they are so grossly oversized 90% of the time. Seriously, most furnaces are 2X the size they need. W2 would only be needed during recovery from setback.
Ummm sounds like you need a 2 heat stat
yep I hear ya... probably gonna be be minus 40 all winter this year...we got spoiled last year...