Well it was closed I'd say 95% of the time but it certainly isn't airtight! I don't know when it was built but we've been in the house 30 years so it's older than that. Its BIG too, has a second "floor" and one of those pull down ladders to get up there, and man if you think the garage part gets hot just go upstairs during the afternoon on a hot Summer day, you'd pass out it's like an oven! Wood would season in weeks if I could put it up there for sure! But the garage part is big, I think it is a 22' garage door, I fit my Bronco and the wife's Rav 4 in there and there is room to spare, so it might be larger than what you have? But it works like a charm, there are times in the Summer when I'll walk down the 3 steps in there and try to do something, look at the temperature on the wall and end up not staying very long, it gets really hot in there and works quite well!!Woodsman,
Good advice to have the OP just give it a try. I kept the overhead door and the windows shut ... that's the only difference that I see between your success and my failure. You had a lot more air flow than I did. Hmmmm, dry, hot, and air flow ... sure sounds like a good combination!!
You are really putting me to work! I might compromise with doing 10. And having tried this in my garage before, I'm going to bet on the outside splits.To make it real world do 100 splits for inside and 100 splits for outside
If I were a betting man I would go with the inside splits to be dryer