Packaged Duct Heater 30,000 Watts - 240 Volts - 3 Phase - 72.3 Amps - Commercial. Made using a galvanized steel compartment with 1/2 fiberglass insulation and hinged cover. Features door interlock disconnect switch, primary automatic reset temperature limit control and load carrying secondary over temperature protective device.Includes definite purpose magnetic contactor, differential pressure fan interlock switch. Permanently attached wiring diagram on inside of terminal compartment cover. Galvanized steel element rack must always be 1" shorts than duct height and 1/2" shorter than duct width to allow insertion clearance. This unit model comes in numerous specifications. This item is built to order and will require 1 week to manufacture and produce. Within the Lower 48 United States. Due to our business systems and processes, we leave feedback after receiving feedback from you, our valued customers. We believe this process ensures good communication and problem resolution in advance of posting permanent feedback. The item "Packaged Duct Heater 30,000 Watts 240 Volts 3 Phase 72.3 Amps Commercial" is in sale since Tuesday, January 6, 2015. This item is in the category "Business & Industrial\HVAC & Refrigeration\HVAC Systems\Central Furnaces". The seller is "pacifictundra" and is located in CA, MO, & VT. This item can be shipped worldwide.