Rkymtnhigh
New member
Hello all! My wife gifted me a Mr. Heater Big Maxx 50,000btu heater for Christmas. I plan to convert it to propane. I also live at roughly 5,500ft above sea level.
I have a 25x35 steel building (875sq/ft), 10 ft walls, 14ft center height, 3" (r-10?) wall insulation, 4" (r-13?) roof insulation, 1 insulated man door, 1 insulated 16x8 garage door and 1insulated 8x8 garage door.
Also, had a bad hail storm that damaged the pbr panel roof, we put 3/4" ply wood over the top of the pbr panel roof and installed new metal roof on ply wood. I only mentioned this because there is now an air gap between the roofs that I'm sure adds to the roof insulation value.
Anyway, I've done some research and it appears this unit is properly sized. However I can find any info on what I can expect for performance.
How long should I expect it to take for the interior to heat up? Let's say it's 20°f outside, 30°f in the shop and I want it to be 60° before I start working for example. A ball park answer or best guestimate would be sufficient for me as I know there are other factors that prohibit an exact answer. Any personal experiences with heating times on your shop would be helpful too if circumstances are similar.
Thank you
I have a 25x35 steel building (875sq/ft), 10 ft walls, 14ft center height, 3" (r-10?) wall insulation, 4" (r-13?) roof insulation, 1 insulated man door, 1 insulated 16x8 garage door and 1insulated 8x8 garage door.
Also, had a bad hail storm that damaged the pbr panel roof, we put 3/4" ply wood over the top of the pbr panel roof and installed new metal roof on ply wood. I only mentioned this because there is now an air gap between the roofs that I'm sure adds to the roof insulation value.
Anyway, I've done some research and it appears this unit is properly sized. However I can find any info on what I can expect for performance.
How long should I expect it to take for the interior to heat up? Let's say it's 20°f outside, 30°f in the shop and I want it to be 60° before I start working for example. A ball park answer or best guestimate would be sufficient for me as I know there are other factors that prohibit an exact answer. Any personal experiences with heating times on your shop would be helpful too if circumstances are similar.
Thank you