Do they make a programmable thermostat that displays your furnace runtime?
I had a thermistat at one time that displayed furnace run time. It was made by Hunter, and was called a "Energy Monitor." However, I don't think it is available anymore. I replaced it when I put in my new heat pump and fancoil, as I wanted a Carrier Thermidistat so I could advantage of all the features that my system has to offer. Unfortunately, I gave the Hunter Energy Monitor to someone and they didn't have it long as they sold their house within a year. I wish now I would have kept it.
There is nothing more empowering than an idea whose time has come