Answers
Jan 06, 2016 - 07:23 AM
The units rated operating temperature is from -4 to 158 degrees fahrenheit. The low end of the range is determined with a 70 degree ambient interior temperature and based on it's 76 cfm exchange rate. With these factors the outgoing air would keep the incoming air from freezing the heat exchanger. It does not have a provision to de-thaw the exchanger if it were to freeze with factors outside of this range.
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