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Old 04-02-13, 06:39 PM   #8
Steve Hull
Join Date: Dec 2012
Location: hilly, tree covered Arcadia, OK USA
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It all depends on your well water temp. In Wisconsin it is likely in the low 40's F. In Alabama, it is likely in the mid 60's F.

In general, you need at least a 20 degree F differential between the dew point and the coil temp in order to get latent moisture out of the air. Otherwise you just swirl around steamy air now saturated with water vapor.

As I posted before, it worked GREAT in Colorado with very, very cold water.

Some open loop geothermal units (ClimateMaster) precool the air with water before it goes to the cold coil. This has the advantage that the air is precooled and the existing cold coil now just has to push the air temp over the latent curve in order to condense the moisture. The result is a cooler coil, more water vapor extracted and more efficiency.

But you need that cold coil and in most open loop geothermal units, the coil can be in the high 30's F. THAT low temp really condenses out the water vapor.

consulting on geothermal heating/cooling & rational energy use since 1990
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