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Humidity monitoring and alarm system for unattended detection of building moisture management problems

  • US 8,172,154 B1
  • Filed: 08/24/2007
  • Issued: 05/08/2012
  • Est. Priority Date: 02/22/2007
  • Status: Active Grant
First Claim
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1. A method of monitoring the moisture content of air located in a structure comprising:

  • A) measuring the moisture content in a sample of air at a reference location and using the moisture content in the sample of air from the reference location as a normal value, the reference location being in a position whereat air flowing into the structure is representative of the total air flowing into the structure;

    B) measuring the moisture content in air located at a selected location within a structure and using the moisture content in the air from the selected location as a sensed value;

    C) smoothing the temporal characteristics of the measured values over at least one time frame to reduce the effects of measurement noise and short term moisture transients;

    D) relating the smoothed sensed value of moisture content from the selected location to the smoothed normal moisture content from the reference location and defining a differential moisture content; and

    E) generating an alarm if the differential moisture content exceeds a preset value.

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