JTWOODS

96.5 degrees was the supply temperature. The system was not cooling. What was the supply air temp? With the return air being essentially "hot" air, yes it will impact the efficiency of the system. I don't know of any requirement that would not allow the return to be located where it is other than common sense. I would definitely let my client know that this area was hot and that it will also most likely be cool in the winter.

This was the unit for the 3rd floor only which was the master bedroom and bathroom plus hallway laundry closet. The bottom 2 floors had a 2 1/2 ton unit. Total sq. ft. of the unit was approx. 1800 sq. ft.

Just performed an inspection on a new construction condo in downtown Dallas. The air return for the system was located in a 4th floor roof top access hallway that has no supply ducts to cool this space. The only room at the top of these stairs (2 flights) was the mechanical room with a direct vent water heater and furnace system. The outside ambient temperature at the time of the inspection was 103 degrees F. The hallway leading up to the return was 100 degrees F. How will this hot air return affect the efficiency of the cooling system? The outside unit was a York 1 1/2 ton unit and the A coils were 2 ton. Click to Enlarge 18.89 KB Click to Enlarge 35.78 KB