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DISTRIBUTED INDOOR AIR QUALITY CONTROL MODULE AND METHOD

  • US 20130260668A1
  • Filed: 03/29/2012
  • Published: 10/03/2013
  • Est. Priority Date: 03/29/2012
  • Status: Active Grant
First Claim
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1. A indoor air quality (IAQ) control module for a zone of a building, the building having an HVAC system with a blower for supplying supply air to the zone and for drawing return air from the zone, the air quality control module comprising:

  • at least one sensor;

    a first pressure tap for receiving a supply air sample from the supply air under pressure created by the blower of the HVAC system, the air quality control module directing the supply air sample, while still under pressure created by the blower of the HVAC system, past the at least one sensor and to a vent, the at least one sensor configured to sense a first air parameter of the supply air sample before the supply air sample exits through the vent;

    a second pressure tap for receiving a return air sample from the return air under pressure created by the blower of the HVAC system, the air quality control module directing the return air sample, while still under pressure created by the blower of the HVAC system, past the at least one sensor and to the vent, the at least one sensor configured to sense the first air parameter of the return air sample before the return air sample exits through the vent;

    a controller for causing the air quality control module to alternate between sensing the first air parameter of the supply air sample and sensing the first air parameter of the return air sample; and

    the controller outputting a measure that is related to a differential between the sensed first air parameter of the supply air sample and the sensed first air parameter of the return air sample.

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