This depends on exactly which analog model you have, I replaced my analog Duotherm last year with a Honeywell thermostat similar to this one https://smile.amazon.com/Honeywell-TH5110D1006-Non-Programmable-Thermostat-Heat/dp/B000GGPMO2 though since I had the duo-therm heat pump air conditioner plus propane furnace I had to buy the much more expensive version that support heat + emergency heat. I also modified it with a hi/low fan switch, there was just enough room in the case to mount a hi/low toggle switch on the left side, requiring only the removal of a couple of plastic ribs. There are various wiring instructions online for Hunter and some Honeywell thermostats, note the instructions that come with the thermostats are useless for wiring them up to RV air conditioners.