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  Fans win and DO COOL if used right

  "neither fans nor AC should be operating when you are not at home. Fans make us feel cooler by convecting hot air away from our bods. If our bods are not there, the fan's energy is wasted."

  That is simply not true in many instances. A fan may be bringing in cooler air from another location such as a basement or cool evening air and needs to run during all the cool hours to work effectively.

  In my case, I use a strategically place double window-mount fan that use 50-75 watts. If used well in an area that cools off below indoor temperature at night it can cool off 1000 sq ft on low power for most nights. We live in a dry area where the summer days are often 80-95 degrees and the nights are 60-75 degrees.

  The key is to place it at the coolest and lowest end of the structure and open the highest windows at the opposite end. Keep windows near the fan closed. It will push cool air through the entire place. We can cool our house off by about 10 degrees F on most days.

  Keep ALL windows completely closed when the temp outside is hotter than inside. The instant the outside temp drops below the inside temp, open the windows and turn the fan on and LEAVE it on until the temps reverse again.

  So, 50-75 watts with a fan on for less than 12 hours a day vs. 1000 watts for AC and there ain't no contest. The fan is the clear winner.

  Our electric bill right now for a 2 person 2,000 sq ft house with a highly computerized office that is used all day is about $30-40/month in the summer.On Umbra on fans versus AC posted 1 year, 4 months ago 19 Responses