Damper control in space heating and cooling

Abstract

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 relate, among other things, to controlling a replacement air vent, and to user interfaces.

1 - 12 . (canceled)  
   
   
       13 . A method comprising 
 based on information about an intended flow rate of replacement air to an air handler and an intended amount of time that air is to be delivered from the air handler to the space, performing a calculation to determine a flow rate of replacement air to an air handler to be achieved during periods when a vent that controls the delivery of replacement air is open.    
   
   
       14 . The method of  claim 13  in which the information about an intended flow rate of replacement air comprises a value indicating an average volume of air per time period.  
   
   
       15 . The method of  claim 13  in which the value is specified by a user.  
   
   
       16 . The method of  claim 13  in which the information about an intended amount of time is specified by a user.  
   
   
       17 . The method of  claim 13  in which the calculation includes dividing the intended flow rate by the amount of time.  
   
   
       18 . The method of  claim 13  in which the calculation is also based on information about a duration of a duty cycle of a fan that delivers the replacement air to the space.  
   
   
       19 . A medium bearing instructions to cause a machine to, based on information about an intended flow rate of replacement air to an air handler and an intended amount of time that air is to be delivered from the air handler to the space, perform a calculation to determine a flow rate of replacement air to an air handler to be achieved during periods when a vent that controls the delivery of replacement air is open.  
   
   
       20 . Apparatus comprising 
 a controller to, based on information about an intended flow rate of replacement air to an air handler and an intended amount of time that air is to be delivered from the air handler to the space, perform a calculation to determine a flow rate of replacement air to an air handler to be achieved during periods when a vent that controls the delivery of replacement air is open.    
   
   
       21 - 81 . (canceled)