Currently I have an old Honeywell thermostat. I’m wondering how difficult would it be to upgrade the Thermostat? Are Thermostat largely interchangeable? Is there a reasonable/Cheap road map for me to go down which won’t involve swapping out my furnace.
currently My thermostat is a Honeywell Prestige IAQ HD Thermostat. https://customer.honeywell.com/en-US/Pages/Product.aspx?cat=HonECC+Catalog&pid=THX9421R5013/U