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Old 04-13-13, 05:18 PM   #3
Steve Hull
Join Date: Dec 2012
Location: hilly, tree covered Arcadia, OK USA
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From what I could read in the specs, the units have a coarse SEER rating of 10.5 - 13 ish. This is about what a window AC unit has in terms of BTU cooling/power input.

I bet the efficiency could be WAY increased with little modification with a larger copper exchange coil instead of the keel cooler they use.

The concept of doing direct exchange has been around a long time. This simply means that instead of a long exchange tube, you substitute a shorter, but much more efficient tubing or plate.

A roll of copper tubing, as you suggest would work very well.

Then we need AC to look at it to determine how to better increase the EER. The unit has all the making of efficiency as it has a scroll compressor, co-axial heat exchanger - so it should not be hard.

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

Last edited by stevehull; 04-13-13 at 05:20 PM..
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