What exactly is a Dual Chamber Furnace?

Dual Chamber furnaces typically have an upper chamber for hardening parts conveniently stacked above a lower tempering oven for stress relief.  Both chambers are the same size.  There's room below for a rolling quench tank as well.  Dual Chamber furnaces are great when the shop floor is crowded because of their small footprint.  The furnace pictured here has a manual vertical lift door.  While some furnace manufacturers may have 2 separate units on a cart like structure, Lucifer Furnaces make a sturdy, one piece dual chamber unit with heavy gauge reinforced steel for a much cleaner, longer lasting piece of equipment.  

Series 8000 - Lucifer Dual Chamber Furnaces