Unico System designed and built heating units can be easily installed with the matching blower and cooling modules. For matchups, see table below. The heating module can be matched to a blower module for a heating only system or it can be matched with both a blower and a cooling module for a system that heats and cools. The slide-in hot water/glycol heating coil is supplied separately. If potable water is used, refer to TechNote 112 for disinfection procedures. Note: Add -H to the corresponding Heating Module Cabinet model number to include the coil. For example M2430CL1-X (cabinet only) becomes M2430CL1-H (coil included). The Unico System® Heating Module Cabinet, Accessory Type: Heating Module Cabinet, Series: M Series, For Use with: M2430BL1 Blower Module, 2.08 sq-ft Face Area, 7/8 in C Connection, Steel, Galvanized, 25 in L