Think of the door as a 25 year investment. If you plan on heating or cooling in the future, the initial cost difference will be offset by savings. Agree on thermally broken polyurethane foamed in place insulation. Not just a 3 layer door. You will also notice a significant reduction in outside noise.
yes, I plan on heating the building at last 3 doors immediately. Wash bay/spray booth would like to keep at 55* and other part of shop around 50*.The other two bays,,,well hopefully down the road.
I dont know what you mean by a thermal break
they are HAAS 700 series door
If you are heating it I recommend the higher R value. The $1375 total (and not x5 or per-door) is going to be overrun pretty fast in "input energy" when considering heating a larger builing.
I haven't carried Haas for a number of years, memory is vague on models. I did check their website it says it is a 1 3/4" door with full thermal break. The thermal break is were the outside metal does NOT touch the inside which stops the transfer of cold or hot. This is important if you plan to heat or cool a building and is overlooked by many. Many buy PAN doors and add insulation themselves with no clue as to the difference. Did a couple homes this fall for a builder, one of each side by side. He now understands what I've been trying to tell him. Thermal break doors only for now on.
Don't trust the manufacturers R value for that 1 3/4" . For that matter any door manufacturer. They do not have to have testing done by independent labs, which makes them creative with their numbers....
The way you plan to use it I would recommend a thermal break door.