Is the thermostat functioning properly? 

This allows us to programme or operate the lock remotely.  

However, there were damages, to include that he tried to install a Nest thermostat and blew a fuse because of it.

Also, I want to understand the effect of having two units in one large room - how do they know when to heat vs not heat as they each have a separate thermostat.

Regardless, the thermostat being downstairs is difficult because the cooling setpoint will be reached downstairs much faster than the upstairs resulting in that being hotter all of the time.

You can then out-compete other landlords on nominal rent price and tenants love having AC and a modern programmable system, all while you get a higher NOI (profit).

It just costed me 2500$ for 3 panels/wire/thermostat/heaters/etc and we paid an electrician to install a 3 gang meter base outside for 3000$.

It's a two family property whereby each tenant controls their own thermostats....each apartment has it's own pump.Has anyone installed this type of combi boiler and what has been your experience in terms of efficiency in providing heat and hot water and the cost savings.Has anyone installed such a combi boiler in the NYC area and who have you used? 

And while they may not leave lights on needlessly, or turn the heat up high, frequent long hot showers will of course run up the water heating bill (and be reflected in the water usage bill)... keeping the thermostat at 62 degrees with a window open will run a bill up lickety split... etc.!

I look at the thermostat and it is set to 80 degrees.