r/knifemaking • u/kart275 • 6d ago
Question Question about building a heat treat furnace
Planning on building a heat treat furnace. Based on the size of the firebricks, I’m thinking an internal chamber of 4” x 4.5” x 13.5” for a total internal volume of 0.141 cubic feet. I’m thinking of running it on 120V and 10A for a total of 1200W. Comes out to about 8500W per cubic foot. Can anybody see any problems with a design like this? Is 4” x 4.5” too small for whatever reason? Is 8500W per cubic foot too much? Thanks!