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A power vented direct vent system for a fuel-burning appliance wherein a power venter is associated with a vent pipe to create adequate draft for combustion. Outside air is supplied to the appliance for combustion and also communicates through a regulator with the vent pipe for addition to the flue

A power vented direct vent system for a fuel-burning appliance wherein a power venter is associated with a vent pipe to create adequate draft for combustion. Outside air is supplied to the appliance for combustion and also communicates through a regulator with the vent pipe for addition to the flue gases. The draft regulator assures adequate draft and can be a barometric draft control. The power vented direct vent system is directly connected to the fuel-burning appliance with complete isolation of the combustion system from the space in which the appliance is located.

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A power vented direct vent system for a fuel-burning appliance comprising, a vent pipe for conveying flue gas to an outlet end of the vent pipe at a discharge location outside of a building and having an inlet end for connection to an appliance, means including an intake pipe and a blower for supply

A power vented direct vent system for a fuel-burning appliance comprising, a vent pipe for conveying flue gas to an outlet end of the vent pipe at a discharge location outside of a building and having an inlet end for connection to an appliance, means including an intake pipe and a blower for supplying make up air from outside the building to the appliance, said intake pipe and vent pipe being concentric over substantially their entire extent between the blower and the appliance to define an unobstructed air path for ambient air to the appliance, and means for controlling the amount of make up air which flows directly from the intake pipe to the vent pipe to assure sufficient draft at the burner of the appliance, said controlling means including means for controllably delivering make up air flowing in the unobstructed air path into the vent pipe adjacent to the inlet end of the vent pipe.