Tried and true Solar Kiln plans

[YellowHammer]

Is that a Southern hemisphere special?  (upside down)

The wind from my computer must have rolled it over,  :D I fixed it this morning...the lumber even stayed stacked :D
YH

[FarmingSawyer]

So here's a question for the more experienced and technical minded..... @Planman built a great functional Pineywoods Kiln, but made it 18ft long to dry 2 stacks side by side. Is it possible, instead, to make the shed something like 12' x 10' and put two stacks in front and back? Or is the air circulation inhibited by the depth? I guess, too, the roof would be tall and long, increasing that cost.....At that point, maybe it's better to build two smaller kilns on skids......

[Glenn1]

You can certainly put 2 stacks back to back but if they are not in perfect alignment, the air will not get to the back stack.  To eliminate the problem, you will need to leave more space between the stacks so the air can find its way through the 2nd stack. 

Glenn

[pineywoods]

Planman's 18 ft length will indeed allow loading two stacks of 8 ft lumber, but that wasn't the main reason for the 18 ft length. Drying 16 ft lumber is why.
The original is 13 ft, but we discovered that there's not much demand for 12 ft boards. Placing 2 stacks side by side effectively is an 8 ft wide stack, which is too much for decent airflow, and even drying. Stack width in these kiilns is pretty much determined by the length of the forks on whatever loader is used to load stickered stacks of boards. Not much point in making the enclosure much wider even if cost was not a factor. Building 2 kilns and staggering the loads might be a good idea.