Just another Goodman installed professionally. It's all about the install, we have tons of these systems purring without any problems!!
There was a lot more behind the scenes on this one that isn't pictured. The original furnace was a 125K BTU natural draft Payne, new one is a 70K. It had a single 14" return that just shotgunned right into the downstairs living room. They had been living with this screamer for 6 years and have never been able to watch TV comfortably. We added a 2nd 16" return that we routed upstairs through a closet and into the upstairs hallway.
Reduced static from 1.3 on the old system down to a respectable .7 total ESP. Weighed in the charge on the AC and will be going back in a couple of months to fine-tune the charge. The AC is 3.5 tons on this 3700 square foot house. Probably could've gotten away with 3 ton based on the load calc but was right on the edge so went 3.5.
We don't normally install AC around here, it is mainly HP's but he didn't want to spend the extra 700 bucks and was more concerned with comfort as opposed to saving a ton on his utility bills.