I do this with welding, dozer work, row crop farming, carpentry, gunsmithing and waterfowl hunting decoy placement. 

The landlord has to, by law, provide a heating source that would be able to heat the unit at x height to x temperature.

Weld and Sons Plumbing. 

But then I am a perfectionist and would like someone else’s opinion.I understand the PSI fluctuates with outside temperature and I have only been able to stop by in the evenings. 

Is it that the electronic temperature selector won't go any higher, or is it that they're using some kind of thermometer?

Temperature variation across the length of the planks is probably contributing, an inadequate moisture barrier underneath, the contractor didn't seal the ends of planks near the door, or maybe there's not enough of an expansion gap between the walls and the floating floor in that area. 

I need someone who can weld/solder a copper basin on the roof. 

It’s freakin cold in MD, and I’d argue that that it’s not appropriate to paint at these temperatures.

The unit has a diverted which then allows each unit to control their own temperature.

Nothing worse than unsweet tea at room temperature (or worse, cold) with sugar mixed into it.