Up here in northern MN, propane is now $6.10 a gallon. At 95% efficiency that's $69 per million Btu's. Electric right out the wall is $29. This is doing a few things. Plenum heaters are 3 weeks out. People are plugging portable heaters into every circuit in these old fuse panels and upping the fuse size. I see fires coming, houses freezing up. It's a mess.