Paragon kiln -
The Paragon KM-18T represents your opportunity to economically begin your own heat treating capability. Like all Paragon Kilns, it is built like a tank. This one boasts extra thick 3" firebrick for efficiency - a door switch for your safety - and if you like, you can make it yours by choosing side swing or drop door and even choosing other colors. This one comes with a numeric keypad controller - which is SO WORTH the extra bucks. You'll recover the cost in Tylenol savings.
18" is pretty good for most makers. Think of the longest blade you'll make - Chef knife? Fillet knife? Carving set? Now add an inch for the foil envelope. Unless you do big Kukrhi or Machete', this will handle what you feed it.
Sorry, no sales outside Canada
Are you ready for this? It runs on 120V - 5-20 outlet - standard in much newer construction.