As the name suggests, ventless gas heaters are room-heating furnaces that do not let the air to vent outside a room. Ventless heaters are a hot favorite among the consumers these days, as they are much more efficient than the traditional heating systems. They do not lose heat, as there is no outside air exchange. In other words, they take the oxygen from inside the room for the process of combustion to take place. The resulting heat is vented out directly from the unit.

Ventless gas fireplaces are designed in a manner that they burn natural gas or propane as minimally as possible. Most models do not need any electricity for functioning. On the other hand, they burn through a fixed line that is linked to a blue or yellow flame burner or a ceramic plaque burner inserted within the gas appliance.

Types Of Units

A ventless gas heater is a cost-effective way to heat spaces at nearly 99.7 percent efficiency. There are many types of units available, such as blue flame or radiant. They can either be portable, free standing or wall mount, even gas logs. These work either with the help of liquefied petroleum gas (LPG) or with natural gas.

• Blue-Flame Heaters - Blue flame heaters work much like a central heating system. Blue flame heaters get their name because of the blue flame they give off. Blue flame heaters are preferred by people because of their efficiency, effectiveness, and abundance.

• Radiant Heaters- Radiant heaters are another type of ventless gas heaters. They are suitable for large facilities, such as warehouses, garages, and storerooms. They generate heat using infrared waves. They are the oldest heating systems available and the basis of all heating systems.

• Gas Logs - Unvented gas logs are designed to produce an extremely hot flame, which completely combusts the fuel. This decreases the levels of carbon monoxide and soot that is produced by other gas logs.

How Do They Work?

Vent free gas logs have specially designed burners that are not covered with anything. They are hidden below and behind the logs. Enough air is supplied to the burner so that the combustion process of natural gas can take place. The combustion of natural gas produces less carbon monoxide. These gas logs are the easy source of supplemental heat and are simpler to install than air ducts. They are easier to maintain than a radiator.

Advantages

Ventless gas heaters are controversial but they have many benefits.

• They do not need a chimney or external venting duct

• They are cheaper compared to the wood fireplaces or traditional gas.

• Ventless gas heaters use natural gas or propane as fuel and burn it with the oxygen from the room.

• They are available in many colors and styles and can make a beautiful home décor.

• They do not use any electricity or battery.

The best part about these ventless gas heaters is that the oxygen depletion sensor (O.D.S.) pilot installed in them shuts off before oxygen drops below a safe level.