Terry, well said. My train room gets up to about 80 degrees at times. I have a window air conditioner that prevents it from getting near 90 which is about all I can expect. The temperature variant between winter and summer ranges from about 65 - 80 degrees with humidity no higher than 55% at any time. My only other alternative is to re-box all my trains and put them in the basement which is also humidity controlled. But then I have all these shelves in a room with nothing on them. I think I'll take take my chances with the few near 80 degree days I have in my train room. If I can't see them, I can't enjoy them. At 70, will I live long enough to notice any physical deterioration of my trains due to weather? I don't know, probably not. I'll just keep dusting them twice a year (April & October which coincides with YORK by some strange, or maybe not, chance).