A customer of ours asked me to go look at the AC in his condo at TMS. 8th floor, 1600 sq ft. BIG $$$$$$$ for this place. 2 bedrooms, 2 baths, big open area with a full kitchen, living area, dining area and about 16 movie theator type seats and a glass wall overlooking the race track.
Main complaint is that they can't cool the bedrooms enough at night without freezing out people camped in the living/observation area.
Secondary complaint is that it sounds like a tornado in the closet when the "big" unit comes on.
Open the closet and find these 2 water source heat pumps. One 5 ton and one 2 ton. Evedently they had a problem with cooling the living/observation area on race days, so the origonal contractor wedged another 2 ton unit in there with one 12" duct going to a 14x14 grill.
Both units pull return from the closet and there is a big return grill in the wall. Not quite big enough to be quiet when both units are running though.
The supply for the 5 ton unit is a 14" flex duct running from the outlet of the unit into a big box that all the ductwork branches off of. The air velocity down the center of that duct is around 1600 fpm. It literally sounds like a tornado, and the duct jumps around.
Not a lot we can do about the ductwork without cutting holes in the drywall cieling since there is no room to move around , but we verified that both bedrooms and bathrooms have thier own ductwork, so I designed and ordered some custom lined metal plenums to tame this mess and quiet it down. Gona use the 2 ton unit for the bedrooms and baths, and the 5 ton unit for the rest of it.
I'll take some pictures when we go back and fix it. Probably will still look like crap though. Just not enough room up there for 7 tons of ductwork.