Well the corrosion issue is easily nullified by the fact that window units bathe their own condenser in the moisture drained from indoors. Yes, it's pretty pure water, but the drain pans in window units tend to rust out way before the condenser assembly. Using a small filter on the supply line feeding the mister would eliminate that concern. Also, the misters are pointed away from the condenser coil to maximize evaporative cooling effect on the intake air. If installed correctly, the heat exchanger should be exposed to mostly moist humid air. Only occasional direct spraying might happen during strong wind gusts.
Last edited by jeff5may; 07-05-18 at 07:11 PM..
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