OK, just got asked this ... they have a hallmark HBD85 oil furnace with an "A" coil of unknown size and want to add a/c. From what i'm told the house is under eight hundred sq. feet. My first thought is the furnace is to big, and it is new, as is the coil, this adds to the problem. So, what advice would you give them as far as adding a/c. I would like to tell them to start over. The furnace is going to run for a very short time when heating and move to much air when cooling. So, what would you guys do?
I am not doing this job.