[masraum]

Originally Posted by red-beard

Unless you are using an Evaporative cooler. Those use up water in the process, but do not use much electricity (fan).

The best you can do with an evaporative cooler is the "Wet Bulb" temperature. For example, today it is 100F and RH41%, this leads to a dew point of 71, a "Feels Like" of 123 and a wetbulb of 80.61.

So, as my pool water circulates at 25 GPM, it is cooled to 80.61F. Assuming I start at 93F water, I'll cool about halfway to the dewpoint with a full turnover of water, which is about 17 hours. Call it a day. The sun adds about 3 degrees per day, so I will still need to keep running the evap chiller several hours per day to keep the water about 86F.

The GPC 210 uses 528 Watts. 10 hours is about 5kWh, which is about 50 cents per day for me.

All of this guessing, round numbers, and wild approximations. Do you have any real, specific numbers?

sheesh!