Heat-Timer Genesis

May we have a bit more detail? Start off with — is this a one pipe steam system (one inlet to each radiator, a vent on each radiator) or a two pipe system?

The methods of balancing the two are different, but it is very likely that you can get much better balance without much additional hardware or controls — depending somewhat on what you have.

Down in the basement. Perhaps a few pictures of the boiler might be useful. More important, are there vents on the steam mains? If so what kind? Pictures again may help.

In any event, the first thing to do is to get the system into better balance. This is not that hard to do, but will take patience — and access to the apartments.

I might note that the main property I take care of is also about 7,000 square feet, although it isn't apartments, but it is controlled by one mechanical thermostat — and is in very good balance (most days no room is more than 2 or 3 degrees warmer than any other).

Great! God beginning here and thank you!

If a bit more of a pain. First thing to do is get the apartments more or less in balance, and to do that you are going to need to play with vents on their radiators. Slow the too warm ones down first.

Where is the thermostat located?

Because of a similar imbalance situation, I installed a GoveeLife Smart Thermo-Hygrometers in each of my 4 apartment living rooms, plus the basement. You can buy additional sensors. The set shown is very affordable.

I have it set up so I can monitor all the sensors on my phone. I haven't bothered to set it up on a computer, but I am sure it is possible. These sensors are a newer style with larger batteries for longer life between changes. Don't get the older smaller ones.