It's a new thing, came with the last upgrade.
Not many know about it or use it.
It take up a bit of space, I used it here it due to the pic it showed.
Will note that it's a link in the future.
I blow it off with the air compressor when I take it out in the fall.
It doesn't get any dirtier than...
Maybe you should have copied the whole paragraph. ;)
"To help cool down the coop I have a box fan in the east window of coop, where it's shady most the day, and turn it on late afternoon...blows cooler air into coop and pushes hot air out."
Panting is the first sign, holding wings away from body is the next.
Lethargy is what I look for, toss a few treats and the birds that don't go for them deem watching. Almost lost a bird from heat stroke, she was staggering and lost sight in one eye, saved her with Electrolytes. Now I give them...