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Whole House Ventilation System

  • US 20130180700A1
  • Filed: 10/07/2011
  • Published: 07/18/2013
  • Est. Priority Date: 10/07/2010
  • Status: Active Grant
First Claim
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1. A control system for a whole house ventilation system comprising a house air handling system including a fan, a thermostat, and supply and return air plenums, the thermostat selectively controlling the air handling system to maintain desired temperature and resulting in a variable operating cycle period between successive on times, the control system comprising:

  • an air exchange duct between one of the plenums and an exterior vent;

    a controllable damper in the air exchange duct; and

    a controller operatively connected to the house air handling system fan and the controllable damper, the controller storing a desired fresh air exchange rate, and being further adapted to predict an upcoming cycle period for a next successive operating cycle of the air handling system and calculating a fresh air vent time responsive to the desired fresh air exchange rate and the predicted upcoming cycle period, and to control the damper to open the damper for the fresh air vent time during the next successive operating cycle.

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