QUA-4KW DUCT HEATER INSIDE DUCT DIMENSION 30X8 SUPPLY LINE VOLTAGE 277/1 PHASE SINGLE STAGE CONTROL VOLTS 24 CONTROL OPTION K SPECIAL FEATURE CODE: E36,E23,L4,M6,P2,P3,Q,Q4,T2,U8,Z3 AIR FLOW U8 OVERHANG L4 INDEECO