Vent-free means flexibility
Vent-free, or ventless gas fireplaces; operate without a chimney, flue or any other kind of traditional ventilation system for exhaust gases from combustion. Simply put, the gases aren't sent outside, which means that they stay in the room where the fireplace is located. These kinds of gas fireplaces are the most flexible, and they can include gas logs (gas fireplace inserts) as well as wall fixtures or complete fireplace inserts as a retrofit for your old-fashioned wood-burning fireplace.
Modern ventless fireplaces are:
- inexpensive and cost little to maintain
- 99% energy efficient
- design-certified to the latest safety standards
- do not exceed 40,000 BTU/hr of heat output
Ventless gas fireplaces and stoves are designed to burn natural gas or propane as cleanly as possible. Most models do not require any electricity for operation. Instead, they burn through a permanent line that is connected to a blue or yellow flame burner or a ceramic plaque burner within the gas appliance.
Ventless gas fireplaces and stoves are quite rapidly becoming the most frequently installed supplemental natural gas-fired home heating product in North America . Currently, around eight million American homes and more than 45 million households worldwide enjoy ventless gas fireplaces for their comfort and convenience. For many people, they are preferable to wood burning fireplaces, due to the fact that ventless gas fireplaces generally require less maintenance, and emit less particular matter (PM) which is made up of soot and ash. However, environmentally conscious consumers tend to steer clear of natural gas where possible, since it is a fossil fuel. On the bright side, the only emission that natural gas releases in significant amounts is carbon dioxide (CO2) – so from an immediate human health perspective, it is one of the cleanest options available.
Note: The Hearth, Patio & Barbecue Association recommends that owners of all gas heating units purchase a carbon monoxide detector. Since 1980, all vent-free gas fireplaces or stoves have been equipped with a unique safety system called the ODS (Oxygen Detection Safety Pilot), which is an oxygen depletion sensor. It shuts off the gas supply if the oxygen level in the room falls from a normal 20.9% to no lower than 18.5%.