AAON condenser coils are always my favorite to measure and the the RK-05 does not disappoint. Very similar in physical size of it's sister unit the RK-03 , having two rows with 1 less feed on the liquid collection header then the hot gas header. The liquid line connection is located at the bottom tube of the coil and makes an 8 pass sub cooling loop. This sub cooling circuit ensures complete change of state of the refrigerant to a iquid before leaving the condenser coil. Nationwide Coils is your premier HVAC coil manufacturer for direct replacement coils, allowing a perfect fit and performance every time.