ASHRAE STD 87.1
1992 Edition, January 25, 1992
Method of Testing Fan Vibration - Blade Vibrations and Critical Speeds
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Description / Abstract:
This standard applies to propeller fans for use in heating, refrigerating, and air-conditioning units. The fans may be of a built-up or monolithic construction and with or without resilient hubs. The sizes typically range from 10 in. (250 mm) to 30 in. (760 mm) in diameter.