My curing box is 20 cubic feet. I constructed it out of 2" x 4" lumber and 1.5" foam board insulant. The foam board comes in 4' x 8' sheets. I built the fram with the woods then enclosed with the foam board. I then mounted 3 sets of closet rod couplings to run dowels across the box. I can then hang bacon hooks, meat hooks from the dowels. The box isn't completely air tight but it works great for now as my garage is insulated as well.
Humidity: I have a cool-mist humidifer that I picked up for $17. It has settings for 35-55 % humidity. The 55% humidity keeps my chamber at approx 64%. However, Portland, OR has great temp/hum. for dry-curing. The hum. only turns on during really dry-cold days.
Temp: When the temperature drops beneath 40 degrees F, I have a 75w bulb hooked up to a dimmer. I turn it on low and it keeps the box at approx 46F. Portland only gets hot in July or August. Those are probably the only months I won't be able to dry-cure - but you never know.
Pictures are as follows:
Let me know if you have any questions. I hope all of you have a good day.
