Brandon,
Here’s another idea..
Just because your heater was originally laying down, doesn’t mean it has to for the future..
If you stand it up, the exhaust will be coming out horizontally, which is better for parking garages,
and will keep rain out too !!
In our service dept. the other day.. we had to remove a horizontal coil for re-insulation,
and found the coil was badly deteriorated where it had sat in rain-soaked insulation.
The question of which lasts longer between horizontal and vertical coils,
Is answered…
Almost 30% of the wall-thickness was gone from the outside of the pipe !
Nuf said.
Anyway, have fun setting it up !
Just make sure ALL is serviceable.