** COIL NOTE: If coil was in a POTABLE WATER system and failed (excessive velocity or erosion), the use of a FLOW CONTROL DEVICE could help extend coil life by reducing flow to recommended GPM. Refer to product spec at www.firstco.com to check flow.

9-320-441 - Coil HW 60HBXB-HW 20MB-4HW 320-441 (20MB-4HW) heating coil

9-320-446 - Coil HW 18/24HDX MB - 9-320-446 (8MB-2HW) heating coil (can use 3-row coil 9-320-447)

9-320-448 - Heating Coil HW - 30/36HBX 10/12MB-3HW (FWA50-HW)

9-320-449 - Coil HW 48HBX 16MB - 320-449 (16MB-4HW 48XMBXR-4HW) heating coil