Thanks Jim, good info. My shop is 22 x 28 x 9', R-30 blown fiberglass in ceiling, 2 x 6 walls w/R-19 glass batts, SOG, 8' x 9' roll top R6, 1 std insulated man door, 25 sq' of dual glaze vinyl frame windows. I'm in Three Rivers, Oregon. 95% of daily lows are above 10F (5% below 10F). My heat loss calculator tells me that my shop loses 13.5K BTU/H. Looks like the Fahrenheat 5K Watt puts out 17K+ BTU/H. I'm ordering it tonight. Thanks for the tip...looks like a great unit, particularly the fan feature. I've got a couple of oil filled heaters in there now, will probably use them on coldest days till shop is at temp then shut them down.
Scott Vroom
I started with absolutely nothing. Now, thanks to years of hard work, careful planning, and perseverance, I find I still have most of it left.