What is a direct vent appliance?
A direct-vent sealed-combustion furnace, boiler, or water heater brings combustion air directly from outdoors to the sealed combustion chamber through one sealed pipe and exhausts the byproducts of combustion (carbon dioxide and nitrogen) to the outdoors through a second sealed pipe (Figure 1).
What is the difference between direct vent and non direct vent?
Direct vent (two-pipe) vent system – This system uses one pipe to bring in outside air for combustion and another to remove exhaust gases. Non-direct (single-pipe) vent system – This system uses only one pipe to remove exhaust gases.
What is a direct vent heating system?
A direct-vent wall furnace is a self-contained sealed combustion heating appliance that warms inside air by recirculating it around a sealed chamber, and discharges combustion byproducts outside the home via direct-vent. They are permanently attached to the structure of a building, and are not connected to ductwork.
Is a gas dryer a direct vent appliance?
In this context, the vent that directs combustion products is the vent that directs hot air and lint. They are one and the same for gas dryers.
What is the difference between direct vent and atmospheric vent?
Basically, the difference between the two is that the power vent water heater removes combustion gases from the atmosphere via a powered venting fan, while a direct vent water heater vents these gases into the outdoor atmosphere using a chimney or exhaust pipe.
Do direct vent fireplaces smell?
As the waste air for vented forms of gas fireplaces leaves a home, there are typically no smells associated with the normal use of natural vent or direct vent gas fireplaces. This means that the air used within a direct vent gas fireplace doesn’t mix with the air in a home and is completely separated.
What is the difference between direct vent and vented fireplace?
A B-vent must be vented vertically and uses fresh air from inside the home to provide oxygen to the fire. A direct vent has a sealed glass front and pulls all of its fresh air from outside the home. Direct vents can be vented vertically or horizontally through an exterior wall.
How does a direct vent boiler work?
Direct vent boilers A direct vented or atmospheric gas hot water boiler vents its flue gas into a chimney or vent pipe that terminates above the roof. It draws air from the room it’s in for combustion in the burner chamber. It also always needs fresh air for the combustion to work efficiently.
Are direct vent heaters safe?
Wall-mounted direct-vent gas space heaters are most efficient and safe to operate. Since no indoor air is used for combustion, the overall efficiency of these heaters is high, up to 84 percent.
Does a gas dryer need a vent?
Gas dryers must always be vented. When gas dryers operate, the combustion that takes place inside produces carbon monoxide, which must be vented either outdoors or into a suitable HVAC ventilation system. Most electric dryers also require venting to keep from blowing hot, moist air into the home.
Do natural gas dryers need a vent?
Since gas dryers produce carbon dioxide as a by-product of combustion, they should always be exhausted to the outside. Outside venting is also important to prevent the exhaustion of water vapor from damaging structures or causing mold and mildew growth.
What is a type B vent pipe?
Type B Vents are factory built double wall vent pipes that are only used to for venting gas. They are always made with a galvanized exterior and an aluminum interior. The air space between walls is fairly small. This vent can be used as a vent or connector, and is quite inexpensive.
What does direct vent mean?
Direct vent is a term used to describe a specifically designed fireplace that performs differently from the traditionally vented fireplace which use a chimney. This type of fireplace has a completely sealed combustion chamber which allows it to vent directly out a side wall of the home.
What is the definition of Direct vent?
“Direct vent” refers to a sealed-combustion system in which air for combustion is drawn from the outdoors, and waste combustion gasses are exhausted to the outdoors. “Direct vent” does not simply mean that all gasses from combustion are vented to the exterior of the structure in which it is installed.
What is a B vent stove?
B-Vent Stoves. B-vent or natural vent wood stoves use air from inside your home to fuel combustion and rely on the buoyancy of hot gases to vent exhaust through dedicated pipe systems.
