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My dew/floor - condensation/pier problems solved by running a box fan from the big green shed @$24.00 - this oscillates and blows across the floor. There is also a 58W light at the base of the pier/ mount, which keeps condensation at bay when the obs is not in use, BBQ cover over the scope to "trap" the modest warmth like a big girl's skirts, (40W not quite enough during the frosts!)
Fan (40W setting) on a daily timer starting at 1100hrs till 1700hrs to avoid overheat at top of dome and prevent stale air/mould, and manual switch "on" when observing.
Light on timer (58W) starting at 1700 till 0700, and removable when observing. There's also a small dehumidifier when the weather requires.
Matting interlocking rubber mats as used under camping awning. (Prevents aching legs when stationary on pavers)
Took a little testing to get the wattage as low as possible, and the timers pay for themselves by restricting the running times to necessary periods only. All up costs about $120.00 including the dehumidifier and switches, but I consider this a good investment when I go out and the gear is dry as a dead dingo's, and not cooking either.
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