@ Freezers Full---How's your sales on those cold days?
Being here In Labrador we experience much the same weather, athough we don't have any snow to speak of yet, which is unusual.
I took Dr of Bbq's advice, got 2 of those heaters, they put out a lot of heat and use a lot of lp..leary of leaving them unattended though, I think I'll use them when out, but at home o'nite I'll plug in some sort of heater, doesn't have to be warm warm, just above freezing will do.
I purchased a heated 3x4 outdoor mat and put it under my two water tanks and water heater, not sure how that will be in the - temps, soon gonna find out. lol
Still concerned with my exhaust fan sucking out the heat, I run a deep fryer and a griddle so the fan is on whenever those units are on, which is always..Anyway, keep the ideas coming..