Box Furnace

No. 908 is a natural-gas-heated, heavy-duty box furnace. Maximum operating temperature is 2000°F, and the workspace dimensions measure 48 inches wide x 48 inches deep x 48 inches high. Four modulating gas burners provide a total of 1,000,000 BTU/hour with a floor-mounted combustion-air blower onboard. The furnace features 7-inch-thick walls comprised of 5 inches of 2300°F firebrick and 2 inches of 1700°F ceramic fiber. It also has a 7-inch-thick floor made from 4.5 inches of 2300°F firebrick and 2.5 inches of 1900°F block insulation.