The fan is controlled by the fan control knob. Cloudy, low sunlight, or rain conditions may not produce enough Photovoltaic Panel energy on the front of the heater to operate the fan, even though there may be enough solar energy for the heater to add 3-4 degrees to the room temperature. Use the AC adapter to operate the fan from household power. (a timer can schedule the fan for day use only). The cost is minimal.
Solar Infra Systems Solar Air Heater — 150 Sq. Ft. Coverage, Model# SIS25M1848
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- Fan provides airflow of up to 50 cu. ft./min.
- Fan is powered by direct sunlight
- Designed for most efficient use in areas up to 150 sq. ft., with single pane glass (Not recommended for use behind thermopane, E and argon gas windows)
- Includes mounting kit
- Spaced collectors allow for 50% of natural light to shine through
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