Relative Humidity exceeds 55% during demanding days. even with AprilAire Whole home dehumidifier. Monitored Relative Humidity/Indoor return wet bulb throught my time at the house. %RH did not exceed 52%. Wire R, C, and G from equipment to DEHUM control, following install manual. ( Prevents outlet air from entering inlet of dehumidifier). Will make comfort consultation appointment with Joe to attempt to give a definitive solution to humidity problem. (Second attic AC system or another Whole home dehumidifier).