How to build a kiln

[Mr. Don]

I wanted to build a kiln and a storage cabinet for my waxes and finishes that were temperature controlled. So, I figured as long as I was at it, go for one of each. Basically they are the same animal.
1.) Scrounge up 2 old fridges (Craig's List or curbside)
2.) Buy 2 of those little electric heaters that are for small rooms (about $20). They are cheap to run, and have good thermostats.
3.) Buy 4 3" or 4" round screened vents, (got mune for under a buck each at Ace Hardware)
4.) Cut 4 4" or 5" discs from thin plywood or similar stuff.
5.) Use a metal-cutting hole saw and cut holes at the top side of the main compartment all the way thru to the interior, and the bottom center of the door, to fit the vents into. I used Gorilla glue to weld them in place.
6.) Drill a 3/16" hole just inside one side of the discs, and a 1/8" hole in the outside beside the vents, and install with sheet metal screws, thus creating a sliding (or is it rolling) cover to control draft in and out.
7.) Cut a notch out of the bottom of the door gasket for the heater power cord, and set the heater in on the bottom floor.
8.) Drill a hole clear thru the front door to slide the thermometer in, and use Gorilla glue here.
That's about it...I have my finish/wax storage set at 70F, and I can set the kiln at any temp., and be able to put a pan of water inside for humidity control, and further control with the draft ports. Simple and cheap, and works very well. I have these set outside my shop under a lean-to.