In Utah, certainly the humidifying effect was needed. In cold, sunny weather in the high desert the humidity can drop below 10%, crackling dry.
I know this because I just got back from visiting my kids and grandkids there . . . my lips crack as I'm walking off the airplane when I arrive. I hang wet towels around my bed at night when I visit so I won't dry up and blow away . . . you git the picture.
I'm pretty sure I saw on the Greenhouse forum that
@Dave has a large fish tank in his greenhouse, both as a heat sink and to raise the fish. Is there a lid on that fish tank?
Maybe a large garbage can full of water would be even better. Big and deep, with not too much surface area on top. It would take up less floor area, too, but might not fit under the shelves to get it out of the way.
