e are three different terms that represent three different ways of 'venting' a gas fireplace, that is, to supply combustion air to the fireplace and evacuate combustion gases out of the house. In Australia, the term 'open flue' is commonly used instead of 'B-vent'. B-vent means a traditional type 'B', 4' (102mm) rigid pipe used to evacuate combustion gases. It can also be a certified flexible aluminium liner of the same diameter, inserted into an existing masonry chimney or a prefab chimney.

Direct-vent products derive their combustion air from outside of the home. This is often achieved through either side by side vent pipes or pipes designed with one pipe inside another. One of the two pipes brings in the fresh air and the other expels exhaust gases. Direct-vent products are generally considered to be more efficient than b-vent models.

A B-vent must be vented vertically and uses air from inside the home to provide oxygen to the fire. A direct vent uses a sealed glass front and pulls all of its combustion air from outside the home. This is important in new construction or well insulated homes that are tightly built. Direct vents can be vented vertically or horizontally through an exterior wall. Direct vents are more efficient than B-vents since they do not take any air out of your home.

These terms refer to how a gas appliance takes in the air it needs to burn gas. A B vent unit draws air from inside the home, through ports in the firebox itself. A Direct Vent unit draws air through a pipe from outside the home, into a sealed firebox. Direct Vent models are usually more efficient and safer for today's airtight homes, since they do not use inside air or cause a conflict with range hoods and bathroom fans circulating the same air.

The majority of Hearth Technologies gas fireplaces and inserts are direct vent (DV). This means they have a fixed glass front which seals the gas burner and combustion firebox off from your home. 100% of the combustion air used by the fireplace comes from outside the home through a coaxial pipe. A smaller pipe inside the larger pipe eliminates all combustible gases, maintaining indoor air quality.

A wood-burning fireplace is totally vented. For a complete explanation of these terms see our Venting page.

A direct vent fireplace is a sealed unit that gets its combustion air from outside of the home. The direct vent pipe can vent either vertical or horizontal and can use elbows to go around obstructions. B-Vent units use combustion air from the home but can be enhanced with an outside air kit. B-Vent pipe must terminate vertically and you must follow the installation instructions of the B-Vent manufacturer.

Answer: A B-Vent fireplace draws air from inside the home through ports in the firebox itself. A Direct Vent unit draws air from outside through a pipe into a sealed firebox. Find A Top Air Conditioning ContractorThis is a hot summer dont suffer through it install air conditioning.airconditioning-contractor.com

Non-sealed combustion models are also available (B Vents) when a direct vent installation is impractical. Direct vent models are the preferred system for the benefits of greater efficiencies and the sealed combustion chamber. Yes. Some models can be ordered as either a natural gas or LP unit, or an LP conversion kit can be ordered with the fireplace.

Vent free fireplaces are fireplaces that do not require any type of vent system. Instead, they are designed to burn clean and the combustion by-products allowed to flow into the room the fireplace is located in. Stringent requirements ensure that these fireplaces not only burn cleanly, but that they are located in rooms of sufficient size to ensure an adequate supply of fresh air is always available for the combustion process.

Vent-free logs are rated as a heating appliance and do not require venting to the outside. Vented logs are rated as decorative and require venting to the outside. Heatmaster vent-free logs are CSA certified both vent-free and vented.

Cabinets are boxes that extend about 18" from the wall. Mantels are wood frames that only extend about 4" - 6" from the wall. B-vent cannot have a cabinet. A b-vent fireplace must be installed in the wall, allowing all the piping to be hidden. You may then use a mantel. Vented gas logs can only be used in a wood-burning fireplace. A coal-burning fireplace is too shallow. Vented gas logs are not recommended for a stove due to safety concerns.

A b-vent fireplace is the least efficient venting option and can be vented horizontally or vertically. Direct venting is the most efficient; some are even "heater rated" and can be vented horizontally, vertically or both.

These type of fireplaces do not have a sealed combustion chamber and relies on the bouyancy of hot gases to vent effectively. They must be installed either with an existing chimney that meets the local building code standards or they can be installed using a B vent which is a vent pipe that must be installed to the same parameters of a masonry chimney but can be enclosed in combustible material. They draw air (oxygen) necessary for combustion from the area surrounding the fireplace.

No. Vented and vent-free logs are different in many ways. Heatmaster vent-free gas logs are also certified as vented (with the exception of the thermostat models), but the vented logs must always be vented.

Please click here to learn about Vent-Free Gas Products and the Vent-Free Gas Products Alliance. Please click here to view the consumer guide to vent-free gas products.

We bought one of your stoves 2 years ago and love it. However, the thermocoupler is faulting and needs replacement. We have misplaced our owners manual. Where can we find a new part or can I order one from you direct. Model #C9740LP serial # 002365. I just purchased C9947N and installed it Tues. evening (the 15th) from Quality Farm And Fleet, in which is going out of business. I have a considerable amount of carbon monoxide. Everything meets standards in the manual.

All vent-free appliances, whether natural or propane, produce water. The accumulation can range from 3/4 to 1pint of moisture per hour in the room. Under normal conditions, this does not cause a problem. However, if you have a problem, you will need to provide an outlet for this moisture. This can be accomplished by providing adequate ventilation or using a dehumidifier to help control the moisture. Yes/No.