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What we are looking for : Good Attic Health
- Temperature: during the summer we would like to see the maximum temperature of the attic under 140°, and preferably more like 120° on the hottest of days. Attic temperatures generally range around 180° to 220° in an attic that does not have an attic fan.
- Temperature: During the winter we do not want to see the temperature of the attic much higher than the temperature outside. This ensures that there is not a leak in the insulation letting the energy of the home escape.
- Humidity: during the summer or winter we do not want to see the humidity in the attic greater than in the home. Humidity is the primary cause of insulation collapse, and so this is one of the biggest benefits of a solar attic fan: it exhausts the humidity and saves the insulation.