The units have a universal heater assembly that is capable of producing electric resistance heat that can operate on a 15 amp, 20 amp or 30-amp circuit. The amount of resistance heat is determined by the selection of the correct power connection kit.

Units installed on 230 or 208-volt circuits may be line cord connected by plugging the line cord into a wall-mounted receptacle in the closet or directly connected. ZVAC units come with a unit-mounted junction box to contain the wiring connections when direct connection installation is made. Connections must conform to local codes.