One boiler and all the units were zoned with separate controls and individual thermostats in each unit.

But I know I'd have been happy if my home came with Nest thermostats, Dropcam(s) in the nursery, wireless mesh pre-tested for that specific floorplan, one of those doorbell cameras, etc.

The second detail is that the thermostat is regularly set to 85 degrees (first thing to change on my end).

I am willing to share (and have already shared some of)  my    knowledge /experience by posting comments within BiggerPockets.For individuals that would like to read about an alternative way to turn up your 'financial thermostat', please click on the following link to read my 22 page FREE eBook-  'Creating Wealth thru Commercial Real Estate Development'I look forward to interacting with new colleagues!

I would like to notify my tenants that maintenance (exterior painting, new thermostat, carpeting, floor tile cleaning, etc) will be performed at landlord's expense. 

They might agree now on an thermostat temp, but what about when there's a vacancy and you now have to "sell" this situation to a potential new tenant?

I'm concerned tenants just won't give two cents if utilities are included.....let drips happen, turn the thermostat up to 80, etc. 

Nest type thermostats, keyless deadbolts, connected smoke alarms, wireless cameras, bluetooth items, USB ports, etc.

Maybe it is a thermostat that can be replaced as opposed to a new heater.

With separate electric heat and thermostat in each room there is no issue with the tenant not having heat when all they have to do is pay their electric bill and use the thermostat accordingly.