Canarm Utility E Haust Fan

Central Fan Catalog
Fan selection. Where noise is a critical factor a more detailed, scientif-ic analysis of the noise source and its surroundings would be desirable. However, lined ducts, especially near the fan, pro-vide ample sound attenuation for most clean air situations. Also, to double the loudness (SONES) of a given fan, 13 more of the same fan must be added. ... Doc Retrieval