AMCA is now accepting applications for the testing of tunnel ventilation fans per ANSI/AMCA Standard 250, Laboratory Methods of Testing Jet Tunnel Fans for Performance .

ANSI/AMCA Standard 250 prescribes a method of test enabling direct measurement of the thrust produced by a jet tunnel fan. While the method of estimating thrust based on a measurement of airflow prescribed in ANSI/AMCA Standard 210/ASHRAE Standard 51, Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating , and ISO 5801, Fans—Performance Testing Using Standardized Airways , is extremely accurate, it does not consider the effect of air entrained around a fan’s discharge, which increases the momentum of air moving within a tunnel or parking-garage space. Vibration is measured at support points per ANSI/AMCA Standard 204, Balance Quality and Vibration Levels for Fans .

Following the October 2018 revision of AMCA Publication 211, Certified Ratings Program Product Rating Manual for Fan Air Performance , jet fans no longer can be certified using ANSI/AMCA Standard 210/ASHRAE Standard 51 and ISO 5801 and must be certified using ANSI/AMCA Standard 250.

ANSI/AMCA Standard 250 applies to small axial and centrifugal jet fans used in parking garages or car parks and larger axial jet fans used in tunnel ventilation. AMCA’s test rig, donated by Kruger Ventilation Industries Asia Co. Ltd., is capable of testing fans with diameters as large as 55 in. (1,400 mm).

Along with performing thrust-measurement testing per ANSI/AMCA Standard 250, AMCA can test jet fans for sound per ANSI/AMCA Standard 300, Reverberant Room Method for Sound Testing of Fans .

For more information and to schedule testing, contact AMCA Technical Director Nazme Mohsina at  nmohsina@amca.org .

AMCA this week conducted its first ANSI/AMCA Standard 250 thrust tests at its laboratory in Arlington Heights, Ill.