VENTILATION FAN
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United States of America Patent
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app pub date -
Jul 31, 2015
filing date -
Jul 31, 2015
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Abstract
A ventilation fan according to the invention comprises a fan module, a fire damper module and a cover module. The fan module comprises a housing having an air intake and an air outtake. The fire damper module is disposed in the air intake and comprises a fire damper body and an adjustment element. The fire damper body has a flange extending inwardly on the inner surface thereof and the flange has an opening. The adjustment element is disposed near the opening and on one closer side of the flange to the fan module. The cover module is disposed on the fire damper module.
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