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| Number | Title | Issue Date |
| 8185244 | Ventilation system and method An amount of time that air has been delivered from an air handler to a space is tracked, and based on the tracked amount of time, at least one turn-on time or one turn-off time of the delivery of air from the air handler to the space is controlled. Other features re... | 05/22/2012 |
| 7258280 | Damper control in space heating and cooling An amount of time that air has been delivered from an air handler to a space is tracked, and based on the tracked amount of time, at least one turn-on time or one turn-off time of the delivery of air from the air handler to the space is controlled. Other features re... | 08/21/2007 |
