Tjernlund Original Duct Booster Fan
Installs in round ducts up to 8” or in rectangular ducts as shallow as 3.25.” Motor is outside of airstream for extended service life, good for temps up to 2000F. Quiet, 1500 R.P.M. operation. Use PS1503 Duct Airstat for automatic operation with any forced air system. 40 Watts.
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