Product Specification Guide
Sure-Aire Flow Monitoring And Electronics Package

Fans with Sure-Aire Flow Monitoring and Electronics Package selected shall include the following.

1.	Flow monitoring station shall monitor the pressure difference between the fan inlet and the smallest diameter of the inlet cone.
2.	Volumetric flow to be calculated from empirically derived formulas based on testing by the fan manufacturer.
3.	Flow monitoring station shall not use air restricting flow devices that reduce fan performance or create additional fan sound.
4.	Two (2) equidistantly spaced sensor orifices to be drilled in the smallest diameter of the inlet cone venturi. Pressure tubes from each venturi port shall be joined and single averaging tube to the exterior of the fan housing.
5.	High-pressure flow port(s) shall be mounted in low velocity fan inlet. Flow ports from the high-pressure sensor shall extend to the exterior of the fan housing.
6.	Termination locations shall include a low-pressure connection, a high-pressure connection and a listing of the empirically determined flow rate coefficient.
7.	Flow monitoring station to be supplied with electronics package that includes pressure transmitter and LCD digital readout. Electronics package shall accurately measure the pressure differential to within +/- 3%.