Image A direct-vent sealed-combustion fireplace takes its combustion air directly from outside through a dedicated air inlet and vents combustion products directly outside Publication Date Mon, 02/04/2013 - 12:00
Image An oil-fired boiler with direct combustion air and exhaust venting Publication Date Wed, 02/25/2015 - 12:00
Image Right – Baffles are foamed in place between the roof joists of the vented, vaulted attic to direct air from the soffit vents up to the ridge vent. Publication Date Thu, 09/30/2021 - 12:00
Image Clothes dryers vented directly to outdoors, except for ventless dryers equipped with a condensate drain
Image A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust Publication Date Thu, 02/07/2013 - 12:00
Image Vent the kitchen fan exhaust directly to the outside, not into an attic, crawlspace, or space between floors Publication Date Tue, 02/01/2011 - 12:00
Image Furnaces, boilers, and water heaters located within the home’s pressure boundary are mechanically drafted or direct-vented
Image Right – Raised heel trusses allow room for insulation over the exterior wall top plates, while baffles direct ventilation air to flow above the insulation from the soffit vents to the ridge vents. Publication Date Thu, 09/30/2021 - 12:00
Image Category III oil-fired, sealed-combustion boiler configured as a direct-vented appliance that draws its combustion air from outside
Image Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC Publication Date Thu, 02/07/2013 - 12:00
Image Wrong – Two combustion appliances are sharing a flue which could lead to backdrafting if one appliance is updated to a direct vent appliance and disconnected from shared chimney.
Image For fireplaces that are not mechanically drafted or direct-vented to outdoors, total net rated exhaust flow of the two largest exhaust fans is .15 CFM per 100 sq. ft. of occupiable space when at full capacity
Image Wrong - The furnace intake and exhaust are too close to each other and should be facing different directions. Publication Date Mon, 03/29/2021 - 12:00
Image Combined water and space heater using tankless water heater Publication Date Fri, 07/01/2016 - 12:00
