You should know how to change a fill valve in a toilet, replace a ceiling light fixture, replace a ballast, balance a ceiling fan, replace a hot water tank, change the agitator dogs in a clothes washer, replace a heating element or thermostat in a dryer, etc. 

Joshua, Attic fans are simply a fan with a thermostat that cycles it on when the attic temperature reaches a specified temperature.

I see their thermostats set at 80 all the time.I will say that the only reason I accept Section 8 is because the money is guaranteed.

There is one large central (~25 yo) boiler, tenants do have individual thermostats however.

I think he means a thermostatic mixing valve.

It often turned out that the problem was the exhaust fan, the contact/relay or the thermostat, all of which I could replace.

To start, do I just turn on the emergency switch on the wall, and the power switch on the boiler and adjust thermostat?

I wouldn't even bother to insulate if electric heat, put on a wireless or landline thermostat and tell renters to turn on on their drive up and have a nice wood stove.

In order to get the loan you have to make "green" improvements, like electrical efficiency lighting, app controlled thermostats, insulation, and all kinds of other energy  or earth saving features.  

There are two kitchens, upstairs and downstairs in the main building but both units are fed from a single electrical panel and there is one common furnace with a single thermostat in the upstairs unit.