Hey to GTRClive - I'm in Saskatoon (that's in Canada for our US friends

!) and although I didn't go overboard (maybe I should have?) on my insulation, I haven't had any problems. I have "regular" 2x4 R20 walls and R30 ceiling with two big 16x9' doors. The heat is just a Hot Dawg Type electronic Forced air system. It didn't run all that much last winter and didn't "break the bank". Of course if you could do more, you would, but I'm wondering at what point does the cost of insulating catch up with difference in heat costs. Now I only keep mine at 7C (programmable thermo) unless I'm in it. Another thing was the type of heating - I was going to go in-floor, then radiant, but here's what I thought were the drawbacks: with in-floor you may still require a forced-air unit to change the temp quickly. As I was going keep it cool unless I was in it, it would take 12-16hrs to get a floor system from 7C to 18C. As for radiant, I was warned about the "direct" heat you get on whatever's in front of the unit (car side, your head, etc.), plus the clearance needed around the unit takes up alot of space (needed 18" from ceiling and walls). So, in the end (and I guess because I'm not rich!

) I went with the Hot Dawg type. In a 40x24 shop it works great, blows right across and warms it up to 18C in minutes. In Saskatoon last this year we had long stretches of -25-35C (that's minus 10-15F in US). Anyways, just my thoughts...I guess had money been no object I would have gone with 2x6 walls, R30 and in floor as well as forced air! Of course I'd also have a Hemi-Challenger, convertible Vette and a Shleby!!
