Low Cost, top quality single chamber box furnaces rated for 2200°F operation to harden, draw & anneal. Designed for the occasional heat treater with small loads who wants to bring their heat treating in-house to control quality, save time and avoid minimum lot charges. Rated for workloads up to 25 lb/sq ft of hearth area. Furnaces are completely wired, assembled, test fired, and shipped ready for connection to main power supply. Available in 4 standard sizes. Ideal for small Tool & Die Shops, Schools and R&D Labs. Safe, simple and dependable operation. Standard Features include: Honeywell digital temperature controller in separate NEMA 1 Panel, reinforced and welded sheet metal shell, heavy gauge low watt density heating elements in easy-to-replace holders, energy efficient lightweight firebrick insulation, hearth plate for load support and floor brick protection, horizontal swing door with adjustable latch for positive seal, and safety microswitch which shuts off power to the elements when door opens.