Differences between B-Vent, Direct Vent, and Vent-Free gas heating appliances
Mar 5th 2012
Sometimes referred to as Natural Vent - B-Vent appliances use pipe (b-vent) that must be installed through the home and terminate above the roof. They also use room air for combustion, but the amount of air they use is minimal.
Pros: Combustion fumes are vented outside. B-vent pipe itself is relatively inexpensive and simple to install. B-vent appliances are relatively efficient.
Cons: B-vent must be installed through the interior of the home and terminate above the roof which may pose extensive installation labor costs or difficulties depending on the home. B-vent could potentially be a source of cool air into the living area if a downdraft occurs. Some of the heat from the appliance is lost up the vent.
In direct-vent appliances, you use special direct-vent pipe recommended by the supplier. The direct-vent system involves two parts, one part for the exhaust and one for combustion air intake. The appliance itself is a completely sealed combustion chamber and no air from the house is used for combustion. The exhaust vents can go either out through a sidewall or through the roof.
Pros: Combustion fumes are vented outside. Allows a simple installation in cases where the vent it going out a wall and terminates at the wall. No need to terminate above the roof line as is necessary with b-vent or wood burning applications resulting in relatively low venting costs. Direct-vent appliances are typically higher in efficiency than b-vent appliances and put out a lot of heat even with a low flame setting.
Cons: Direct fireplaces have a sealed glass front and typically a smaller flame than a b-vent fireplace or a vent-free fireplace. The position and look of the logs in the fireplace cannot be altered or incomplete combustion will occur.
A vent-free fireplace uses no venting pipe at all which allows placement of the fireplace in many places otherwise unavailable to a vented fireplace. The burner of the fireplace or gas log set is designed to be 99%+ efficient, therefore there is no need to vent the appliance.
Pros: Ease of installation and lowered cost since vent pipe is not needed. Vent-free products are typically the most efficient of all fireplaces or gas logs since all the heat is generated into the room or home.
Cons: Combustion fumes are vented inside the home which affect some people who are very sensitive to smell or allergies. Vent-free products expel a fair amount of moisture as a result of the burn process which also is expelled into the home and can be a problem especially in a room with a lot of windows like a sun-room since the windows may drip from all the moisture. Typically there is a low flame with vent-free products and the placement of the burner or logs are set by the manufacturer and cannot be changed or altered.
Sometimes referred to as Natural Vent - B-Vent appliances use pipe (b-vent) that must be installed through the home and terminate above the roof. They also use room air for combustion, but the amount of air they use is minimal.Shop Now
In direct-vent appliances, you use special direct-vent pipe recommended by the supplier. The direct-vent system involves two parts, one part for the exhaust and one for combustion air intake.Shop Now
Heatilator fireplaces are available in a variety of styles and various fuel options that appeal to every life style whether it be the simplicity of a gas or electric fireplace or the traditional appeal of a wood burning fireplace.Shop Now