Abstract: An automatic remote controllable duct damper with an adjustable minimum flow through the duct, an adjustable maximum flow through the duct, which is configured so that an electric motor configured to adjust one of the adjustable maximum flow through the duct and the adjustable minimum flow through the duct is not configured to drive a damper plate in opposite directions and the amount of the adjustment of the adjustable maximum flow and the adjustable minimum flow is infinitely variable from said maximum flow to said minimum flow, without introducing any new matter within the interior of the duct.

Abstract: An automatic remote controllable duct damper with an adjustable minimum flow through the duct, an adjustable maximum flow through the duct, which is configured so that an electric motor configured to adjust one of the adjustable maximum flow through the duct and the adjustable minimum flow through the duct is not configured to drive a damper plate in opposite directions and the amount of the adjustment of the adjustable maximum flow and the adjustable minimum flow is infinitely variable from said maximum flow to said minimum flow, without introducing any new matter within the interior of the duct.

Abstract: An electric fan powered register booster for a forced air vent in a HVAC system where the booster is configured to stop operation when either of the following events has occurred: 1) the current temperature in the booster has regressed from a recent stored extreme temperature or 2) a predetermined setpoint temperature is between the current temperature and the stored extreme temperature.

Abstract: An electric fan powered register booster for a forced air vent in a HVAC system where the booster is configured to stop operation when either of the following events has occurred: 1) the current temperature in the booster has regressed from a recent stored extreme temperature or 2) a predetermined setpoint temperature is between the current temperature and the stored extreme temperature.

Abstract: An automatic remote controllable duct damper with an adjustable minimum flow through the duct, an adjustable maximum flow through the duct, which is configured so that an electric motor configured to adjust one of the adjustable maximum flow through the duct and the adjustable minimum flow through the duct is not configured to drive a damper plate in opposite directions and the amount of the adjustment of the adjustable maximum flow and the adjustable minimum flow is infinitely variable from said maximum flow to said minimum flow, without introducing any new matter within the interior of the duct.

Abstract: An electric fan powered register booster for a forced air vent in a HVAC system where the booster is configured to stop operation when either of the following events has occurred: 1) the current temperature in the booster has regressed from a recent stored extreme temperature or 2) a predetermined setpoint temperature is between the current temperature and the stored extreme temperature.

Abstract: A dryer exhaust duct power ventilator which is free of any dedicated internal air flow contacting devices for sensing air pressure or measuring fan RPMs and free of any hall effect sensor, but instead utilizes the auxiliary winding of a PSC motor on a centrifugal duct fan to measure the rotation of the motor and fan and thereby determine the pressure in the duct. A clip-on current sensor is located in the dryer power connection compartment and is used to detect operation of the dryer.

Abstract: A dryer exhaust duct power ventilator which is free of any dedicated internal air flow contacting devices for sensing air pressure or measuring fan RPMs and free of any hall effect sensor, but instead utilizes the auxiliary winding of a PSC motor on a centrifugal duct fan to measure the rotation of the motor and fan and thereby determine the pressure in the duct. A clip-on current sensor is located in the dryer power connection compartment and is used to detect operation of the dryer.

Abstract: A dryer exhaust duct power ventilator which is free of any dedicated internal air flow contacting devices for sensing air pressure or measuring fan RPMs and free of any hall effect sensor, but instead utilizes the auxiliary winding of a PSC motor on a centrifugal duct fan to measure the rotation of the motor and fan and thereby determine the pressure in the duct. A clip-on current sensor is located in the dryer power connection compartment and is used to detect operation of the dryer.

Abstract: A dryer exhaust duct power ventilator which is free of any dedicated internal air flow contacting devices for sensing air pressure or measuring fan RPMs and free of any hall effect sensor, but instead utilizes the auxiliary winding of a PSC motor on a centrifugal duct fan to measure the rotation of the motor and fan and thereby determine the pressure in the duct. A clip-on current sensor is located in the dryer power connection compartment and is used to detect operation of the dryer.

Abstract: A dryer exhaust duct power ventilator which is free of any dedicated internal air flow contacting devices for sensing air pressure or measuring fan RPMs and free of any hall effect sensor, but instead utilizes the auxiliary winding of a PSC motor on a centrifugal duct fan to measure the rotation of the motor and fan and thereby determine the pressure in the duct. A clip-on current sensor is located in the dryer power connection compartment and is used to detect operation of the dryer.