Water in and out is 1-1/2" inside dia.
4" Ø Air in and out.
Shipping info: One skid, 75x45x36. Weight = 570 lbs.
This unit was sized to handle 850 SCFM with a design pressure of 13 PSIG. The total heat transfer surface area is 711.6 ft^2 (32.6 ft^2 of tubes, 679.0 ft^2 of fins).