[scherp69]

I have the same 220 heater that Greg has as well as a second heavy duty 220 construction heater (a Home Depot one). My shop is a little bigger than a two car garage. I ran two 220 plugs in the shop, one at either end. I only use them when I want to take the edge off in the shop. One of the days I was out there, it was 0 Celsius so about 32 F. I have a thermometer in the shop and I got it up to about 17 C so 63 F using both heaters. I was wearing a t-shirt in the shop in the winter...it was nice. I usually don't head out when it get past -10C or 14F. I found this was the cheapest route and I can put the heaters close to where I'm working and it warms it up quite nicely. Being in Canada it gets a little too cold to head out to the shop, but this set up works for me.