I recently moved into a townhome that has the old 1971 Heil furnace.
It is reportedly about 60% efficient and has 0% CO out the flue.
I considered adding a 95% efficient furnace and even had the installer out here ready to install and he could not find a place to do the venting due to the layout. Bummer.
In the process of asking questions, I had one person tell me that if I replaced the A-Coil on my unit that I would need to use a seer that matches the outside unit (I think called the condenser). The outside unit is a Payne PA10 which has a seer of 10. Is this really necessary for the longevity of the operating pair?
I am in need of making the installation as inexpensive as possible and still be long lasting. I have a place to get used A-Coils and maybe someone knows where to get new seer 10 A-coils. I need a 2 ton A-coil.