Gas Logs Vented Or Unvented How To Tell

Manual gas valves and others.

Gas logs vented or unvented how to tell.

If there is a heavy gas order with your vented gas logs that means that your damper is not open opened wide enough or the vent in your fireplace is possible in need of repair. Unvented logs ventless and vent free logs in the past three years unvented log sets have become extremely popular and the sales volume is approaching that of the vented logs. Vented gas logs produce carbon monoxide emissions so your fireplace must have a chimney or flue. It is usually by the knob that controls the flame height.

Vented vs ventless gas logs gas fireplaces come in two configurations. This is called the oxygen depletion sensor and is located just outside the range of the fire. To see if you have a vented or non vented gas log i would look first on the manufacturer plate on the gas log burner itself. If the gas is merely contained by a simple gas line then the logs are vent free.

It should be indicated there. Vented gas fireplaces are not as flexible as ventless gas fireplaces in order to install a vented gas fireplace you must use a chimney or an exterior wall. This is so that it can both take in air from the outside and then vent out the by products from the flames inside the fire box. Follow the gas line from beneath the logs to where it disappears in the wall or floor.

Ventless logs do not put off these emissions so no chimney or flue is needed and the heat is more likely to stay in your space. When ignited the flames run through gaps in artificial ceramic fiber logs giving the illusion of a real wood burning fireplace. That can be a plus for many homes during dry winter months but if your home is tightly insulated or you have a humidifier the excess moisture might show up as condensation on cold windows. If you can even find a model you can google that number and see what comes up.

There is less of a gas smell with vented log sets because the air flowing up the chimney flue helps to pull the odor up and out. Also known as unvented or vent free fireplaces a ventless gas fireplace operates with natural gas or liquid propane lp that flows into a gas burner mounted in the fireplace. If there is a small cylinder attached to the gas line then the logs are vent free.