Why is it you do not want to open the vent's as I would think
the heat and fan would circulate air and drop the humidity
my former wife and I ran into this when I lived in Panama
and it is about the same there as Thailand, so I put the
incubator in a closet that I had insulated to keep my clothing
nice and fresh as the humidity really builds up some really
pleasant orders after a short time and I do remember her
using rice along the edges of the closet but the most
important thing was ventilation and as I remember she
got .50 cents per chick so she had to hatch as many as
she could and I do believe her lowest month was around
20 chicks and she did not have a store bought incubator
as she made it from a older metal with foam insulation
after that I got her a little air circulating fan for the lid and
she had several light bulbs for heat and I do believe it would
hold over 80 egg's and her turner was manual as she had a
stich that would move the different racks she had for the egg's
I just know it kept her busy and she had some money to buy
herself new shoes .................