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[muffin]

Is there a way to use the hot water to make a dehumidifier?  My indoor pool room requires a lot of dehumidification.  I have two large units right now, running on electric of course.  Just wandering if there as a way to harness the hot water to do this task so I could shut them down?

[RSI]

If it is cold outside, run some pipe or a water to air heat exchanger outside. (You will need to use antifreeze)
Run it into the pool room and make a coil similar to what the de-humidifier has in it for the cold coil. Pump the cold antifreeze through it. You might need to add a heat exchanger connected to the OWB and blow hot air on it to make it condense faster.

Or you could just put a water to air heat exchanger that pulls fresh air in from outside and heats it. Supposedly real cold air goes to near 0% humidity when heated.

[tulenutn2o]

Cold air cannot hold as much moisture as warm air. That is why in winter air is dry, summer air can be  humid. Relative humidity is simply the amount of moisture the air can hold relative to it's temperature. Short answer is: must have warm, humid air pass over a cooler surface so humidity will condense back to a liquid out of the air, thus lowering the relative humidity.