Thermostate to lock temperature ranges

[Glen Fernandes]

I am covering utilities for the 1st floor and garden unit (for a 3-unit MFH rental)

Any recommendations for a programmable thermostat where I can lock appropriate temperature ranges? (to prevent excess costs) We don’t have access to WiFi in those units.

[Tim Miller]

Any programmable thermostat that has the ability to lock the screen with a pass code should work. You don't want to rely on your tenants for WiFi service, it's not a good idea. We used a Hotspot from Verizon. The unit cost $100 and it was just $10 a month. You don't need gig speed for this, just enough to connect and control from your phone.