Patent ID: 8235777

Claim:
An apparatus for mixing airstreams and adjusting OA/RA (Outdoor Air/Return Air) content of TA (Total Air) in air distribution systems which comprises a mover ( 1 ) with speed control ( 7 ); a main flow-pressure sensing station ( 2 ) measuring TA quantity; terminal flow stations ( 4 ) measuring OA/RA individual air quantity according to deductive and interpolative sensor logic governed by precise Operating Point ( 10 ) placement or replacement using a multi-point breakdown of Total Pressure, its components Static Pressure and Velocity Pressure; a means of Total electrical power metering, including Power Factor, RMS (Root Mean Square) power draw over time under intermittent loads, real time multi-point data verification of all said data, x, y, z coordination, and overall Power Triangulation according to Power Triangle evaluation of True Power against Apparent Power; including compensation for the Reactive Power effects of capacitance and inductance, and steady state power application as monitored and controlled on a user interactive panel display ( 6 ); a ducted mixing box housing fitted with dual damper control ( 3 ) and sensing stations ( 4 ) in parallel operation ( 19 ); a damper actuation means of modulating open or closed, allowing both air streams to be throttled and mixed in particular proportions of Outdoor Air primary air quantity and Return Air secondary air quantity at a prescribed point of operation ( 10 ) and maintained as per flow-pressure monitor sensor input ( 2 , 4 ) at OA/RA terminal inlets ( 5 ); wherein said damper actuation and flow-pressure sensor control follow the relationship TA=RA+OA, less any internal losses or possible regain caused by said dampering and mover changes as determined by the prescribed point of operation ( 10 ) or other observed anomalies in said data; wherein any deviations from the prescribed point of operation are repositioned or offset by systemic dampering and/or applied mover modulation where the changing coefficient of one component adapts to the other's constant and vice versa.