Installation Key
1 | DuraCap |
2 | Storm Collar |
3 | Roof Flashing |
4 | High-Wind Cap |
5 | Round Pipe |
What class or category is a B vent pipe?
They are simply classified as B vent pipes. The specific appliances that are to be vented are classified into various classes or categories, however. B vent pipes are typically used in the venting of category 1 appliances. Generally speaking, in fact, a B vent pipe is only allowed to be used on a category 1 appliance.
What to know before you install B vent furnace pipe?
To do this:
- Cut enough aluminum flashing from the roll to wrap around the vent pipe, with an extra 6 inches to spare.
- Unwrap the flashing from the vent pipe so you can work with it.
- Cut 1-inch deep slots a few inches apart along the top side.
- Bend these newly cut tabs in.
- Now, cut 2-inch deep slots along the bottom and bend these tabs out.
What is a type B double wall vent?
Type-B vents come in many different shapes and sizes, including oval and round. It is a double-wall metal construction that is designed for insulation and safety. The inner pipe is made of reflecting aluminum and heats up quickly. It holds the warm flue gases.
What type of plumbing pipe is best?
- PEX tubes do not require soldering or the use of adhesives for fittings, this eliminates the risk of health hazards involving complex chemicals and lead based solders.
- PEX tubing conserves energy better when compared to copper, it doesn’t transfer heat as readily as copper.
- PEX pipes have greater tolerance to pressure and temperatures

What are Type B vents?
Type B-vents are double-walled metal chimneys/flues and can be used only with listed, draft-hood equipped gas appliances. Type B gas vents such as the Ameri-Vent™ are permitted for venting gas-fired appliances and have their own set of combustible clearance and installation specifications.
What is B duct?
B vent: This approach, also called natural vent, pulls air from indoors for combustion and vents it outside. It features a chimney with a double wall pipe which runs from the fireplace to outside of the home. Homeowners can purchase fire boxes inside another box.
What is the difference between a vent and B vent?
What is the difference between a Direct Vent and a B-Vent gas hearth product? 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.
What is B vent HVAC?
Also known as type B-vent pipe, this HVAC pipe is used for venting any appliances using natural gas or liquid propane with a vent hood attached. Designed to take a lot of abuse, the B-vent pipe heats up rapidly, staying hot throughout application as to create minimal condensation in the venting system.
What is better B vent or direct vent?
0:562:47B Vent vs Direct Vent Gas Fireplaces and Furnaces - YouTubeYouTubeStart of suggested clipEnd of suggested clipNow the difference is to is thus far as installation direct vent can go out a side wall or upMoreNow the difference is to is thus far as installation direct vent can go out a side wall or up through a room a B vent must always terminate vertically it can never terminate out a side wall. So what
What type of furnace uses B vent?
Use with natural gas or liquid propane category I and draft hood equipped appliances, and appliances tested and listed to use Type B Gas Vent. Applications include: natural gas fireplaces, gas-fired furnaces, boilers, water heaters, and wall or space heating applications.
Does B-vent get hot?
Is the listing standard for type B and BW venting. It allows for a maximum rise on surface temps in the test structure of 90*F above ambient when the stabilized flue gases read 400*F above ambient for 1.5 hrs then 117*F after that.
What is Type C vent?
Type C vents are used only as connectors. They are single walled galvanized pipes, and as such often called “galvanized pipes”. They are used only for venting gas or oil. Using a C vent with solid fuel appliances can cause extremely toxic fumes. This is the least expensive of the pipes.
What does B-vent mean in a gas fireplace?
B-vent fireplaces draw in air from inside your room to create combustion, then release the exhaust through a chimney in the roof of your home. These fireplaces are very similar to the installation of a wood-burning fireplace, but still run off of either propane or gas.
Is Type B Vent double wall?
The AmeriVent System AmeriVent Type B gas vent uses a double wall of metal pipe for insulation and safety. The inner pipe of reflecting aluminum heats quickly, containing the warm flue gases inside.
What is the difference between Type A and Type B vent pipe?
Definition of Vent or chimney vent or flu vent: A metal chimney which is "thin walled" - either a single wall of metal or a thin double wall in some areas is called a "vent". A double-walled metal flue used for venting gas fired appliances in the U.S. and Canada is a Type-B vent.
Can B vent touch wood?
Type B Vent shall not be used to vent flue products from incinerators, combination gas/ oil appliances, oil-fired, or wood-burning appliances.
What is a Type B gas vent?
The Type B designation is assigned to gas venting systems that meet the safety requirements of Underwriters Laboratories, Inc . The AmeriVent all-metal, double-wall gas vent is listed as Type B by Underwriters Laboratories, Inc. and is approved for such residential and commercial applications as Category 1 water heaters, boilers, furnaces, space heaters, or wall heaters. UL-approved Type B gas vent products form a continuous passageway from an approved gas appliance to the termination of the vent above the roof of the structure.
How much clearance does a Type B gas vent need?
One of the fire safety features of double-wall Type B gas vent is that its outer wall, insulated by the airspace beneath it, requires only 1” clearance to combustible material in the structure.
What type of pipe is used in Amerivent?
AmeriVent Type B gas vent uses a double wall of metal pipe for insulation and safety. The inner pipe of reflecting aluminum heats quickly, containing the warm flue gases inside. The airspace between the inner and the outer pipes provides insulation against heat loss to keep the warmer flue gases on the rise. The outer pipe of corrosion-resistant galvanized steel ensures strength, safety, and durability.
What is the purpose of a galvanized steel flue gas vent?
The outer pipe of corrosion-resistant galvanized steel ensures strength, safety, and durability. If the flue gases are kept rising at the proper rate, the structure is kept free from pollution, and condensation damage is eliminated. Although a large portion of the flue gas is composed of water vapor, AmeriVent Type B gas vent carries it out ...
Do double wall vents need to be warm?
Designers of vent systems should take particular note of the fact that vents constructed of brick, cement, asbestos, and mass-insulated metal require lengthy warm-up periods, whereas double-wall metal vents reach operating temperatures almost instantly for rapid removal of the flue gases.
What is a type B vent?
Type B Vents. Type B vents are vents suitable only for listed, draft-hood equipped, gas-fired appliances, including most domestic heating and hot water systems. They may not be used with any of the following appliances: wood-burning appliances, such as fireplaces and wood-burning stoves; any appliance that burns anything other than liquid petroleum ...
What is the difference between a Type L and Type B vent?
Both are double-walled, although Type L vents generally have a stainless steel inner wall, while Type B vents do not. Regardless of the vent type, InterNACHI inspectors may check for the following defects: deterioration of the outer wall, which is likely caused by failure of the inner metal lining; violation of roof clearance requirements.
How far above the roof should a metal vent be?
All metal vents must terminate at least 2 feet above the roof surface and anything within 10 feet of the vent, such as the crest of a roof ridge; missing components, such as a chimney cap; firestops not installed at either the top or bottom side of the joist where the vent passes through floors or the roof.
What is considered a wood burning appliance?
wood-burning appliances, such as fireplaces and wood-burning stoves; incinerators; oil -fired equipment; coal-fired equipment; any appliance that burns anything other than liquid petroleum or natural gas; or. any appliance that produces flue gasses that exceed 480° F (249° C).
Can you use a type L vent on a wood stove?
Type L vents should not be used to vent coal- or wood-fired appliances. It may be difficult to tell the difference between Type L and Type B vents because they are made from similar components, but the vent type should be clearly printed on the vent.
What is a B vent?
A b vent allows people to create a larger flame on cold days for a more cozy setting. Many people are unable to do that with a direct vent. The cost of a direct vent is usually more than a b vent. However, people should keep in mind that this only reflects the cost of the vent itself.
Why do people use B vents?
Pros Of Using A B Vent. The main reason people prefer the b vent is that it’s very user-friendly. Generally, people can find one at an affordable price when compared to other styles of vents. Once they get it home, they usually don’t need to call a technician for help.
Why are B vents discontinued?
Many manufacturers have stopped making them because other vents are tailored to modern appliances. People who do want a b vent may have more difficulties finding one.
Why do people feel safer when they have a B vent installed?
People often feel safer when they know that a b vent is installed. This is because all of the combustible fumes are being directed outside. They don’t have to worry about breathing in any harsh fumes while keeping their house warm.
Why are direct vents so popular?
Direct vents are becoming a more popular choice because they are completely sealed. This allows people to keep their house warm all winter without having to worry about cold air seeping in from their chimney. All of these appliances will need a special pipe tailored to direct vents.
What is the difference between a direct vent and a B vent?
The main difference between the two vents is how they pull the air . A b vent always needs to be installed vertically, and it will use the indoor air to keep the fire going. On the other hand, a direct vent has a glass seal that allows it to pull air from outdoors. Let’s take a close look at how each one works.
Why do gas fireplaces have direct vents?
Pros Of A Direct Vent. Most gas fireplaces that use a direct vent have glass sealing to prevent outdoor air from getting into the home. This glass helps them keep their energy bill down while also creating an attractive window. This little feature makes any room more inviting and gives a classy touch.
