=+12-46.

air-handling unit (AHU). The filters have a pressure loss of 0.10 in. wg. the coil has a preware loss of 0.5 in. wg, and the AHU has a miscellaneous casing loss of 0.05 in. wg. The fan can produce 0.90 in. wg total pressure at the design flow. The return system still requires 0.10 in. wg. Use the program DUCT on the website to size the supply ducts using both the equal-friction and balanced-capacity methods