Direct Vent Appliance (Sealed Combustion System Appliance)
Direct Vent Appliance (Sealed Combustion System Appliance) : A system consisting of an appliance, combustion air and flue gas connections between the appliance and the outside atmosphere, and a vent cap supplied by the manufacturer, and constructed so that all air for combustion is obtained from the outside atmosphere and all flue gases are discharged to the outside atmosphere
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