Flow Analysis Numeration System

The Fan Assessment Numeration System (FANS) device, initially developed at the USDA-ARS Southern Poultry Research Laboratory, was refined at University of Kentucky as part of a project for quantifying building emissions from poultry and livestock operations. The device can be used with in-situ exhaust fans in poultry and livestock buildings. Each exhaust fan can be calibrated individually with its exact equipment options such as shutters, louvers and discharge cones. Once calibrated against building static pressure, real-time dynamic measurements of building ventilation can be obtained from readings of fan activity and static pressure. The FANS can serve as a field-based reference measurement technique so that other methods of estimating mechanically ventilated building ventilation rates can be objectively evaluated (e.g. using a CO₂ balance from livestock heat production relations, tracer methods, direct use of fan curves, etc.).

For more information, access the current ASAE FANS development paper or ASAE 2002 Presentation.

Detailed Technical Drawings of all FANS components are also available to aid in fabrication of your own FANS unit.

Special thanks for development and fabrication go to:
Evan Conrad, Burl Fannin, Adam Garrison, Gowon Goode, Jonathan Mirgeaux, Andrew Simpson and Dan Stangeland