Speaking only for myself, I have not experienced significant condensation in the bed at any temperature that is even remotely comfortable - say above 50*. It seems to me that it would be almost inevitable at temps below 40* or so. Condensation occurs when the inside air is humid - it contains a lot of water vapor. Water vapor is generated by people breathing, of course, and can be made worse by showering and cooking. One of the worst sources is standalone propane heaters, since water is a natural byproduct of propane combustion. Whenever you run one of these, you need to crack a vent to let some of the humid air out, or it will rain inside. Seems counter-intuitive, I know. By the way, the TM propane furnace is vented outside, so it does not generate water vapor inside the trailer.
Bill
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