Best Programmable Thermostats?

[Michael Doherty]

Hi all,

I will be closing on a duplex in about a month. There is currently only 1 furnace for 2 units and the owner pays for heat (Natural Gas). Each unit is relatively small around 750 square feet but I would like to have some control as to how high tenants can set the heat. In your experience, what are some good reliable brands that I can seek out to install after I close? I am looking for something that is both easy to install and won't break the bank. 

Thanks,