Nov 29, 2012· Hello. It's me again. I have a question about the blower cfm of our upstairs system. Our upstairs system is a 2012 Amana Distinctions (Goodman, of course) SSX14 2 ton A/C unit matched up with a 2012 Lennox SL280v gas furnace. The A/C was installed back in early April and the furnace was installed last July. The upstairs is 1400 sq. ft. I am wondering what the cfm is suppose to be in cool .