This Month's Stumper:
A big thank you goes out to Jamie Clark of ARRONCO Comfort Air in Lexington, Kentucky for sending in this stumper! Jamie was called to an 18 year old, 2,500 sf, two-story home with a vented attic in Lexington that had a broken central air system. There were two air systems, one in the attic, one in a closet. ARRONCO decided to replace both systems with two ton Carrier® hybrid systems. After the project was completed, all the registers in the house started sweating. Jamie came back the next day to find the humidity level over 70 percent! The two stage systems were running on low most of the time which should have resulted in lower than average humidity (average in Lexington is 55 percent). ARRONCO inspected all the equipment to make sure it was installed correctly, and tested all the equipment. All air volumes were right, the equipment was perfectly sized, all duct work was sealed (with less than 10 percent leakage). Why was the humidity so much higher?