Are Unvented Gas Log Fireplaces Right for Your Home?

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Over the last few years, the unvented gas logs have become extremely popular. More and more people are attracted to the reasonable price and inexpensive installation, but if you are one of those people looking to purchase an unvented gas log fireplace, keep in mind several things. First of all, it’s important to know that there are two basic types of gas logs: the vested gas logs and the gas logs that are not vented at all. As you probably know the carbon monoxide produced from burning gas or wood is extremely dangerous. It is a lethal gas which can affect your health. However, this is not the case with the unvented gas logs which are specially designed to produce a hot flame. The flame produced by these fireplaces decrease the levels of carbon monoxide.


As compared to the gas logs that vent to the outside, the unvented fireplaces come with an Oxygen Depletion Sensor. This sensor stops the carbon monoxide from reaching to a dangerous level in your room. Despite the fact that it is equipped with this sensor, it’s recommended to install more carbon monoxide detectors in your home. In some states, these detectors are required by law. Contact your local council to find out if you live in a region where the carbon monoxide detector is mandatory. The unvented fireplaces are a low-cost alternative to those fireplaces with chimneys and flues. They are more efficient than the vented fireplaces, but they require good ventilation. The latest models are equipped with an automatic thermostat which will help you control the heat output and with a convenient automatic ignition feature.

Where can these types of gas logs be installed?

Some unvented gas logs can be placed in masonry fireplaces, while others can be housed in special fireboxes. Some of these vent-free gas logs are mobile and can move around from a place to another. Nowadays, people are more annoyed about the dangers with such gas powered units. However, some people don’t even know how to use and operate an unvented gas log fireplace.
Another problem regarding the use of this device is the moisture. If you are thinking about purchasing a vent-free gas log, keep in mind that you might have some issues with the moisture. If you have a vented gas log, you already know that the moisture escapes out the vent, but if you own an unvented device keep in mind that all that moisture enters your home. This can be great during the cold season, but it’s recommended to avoid using a humidifier because it may cause condensation and moisture on cold windows.

The Pros and Cons of unvented fireplaces

As compared to the vented gas logs, the unvented systems are designed to burn the gas cleanly, producing almost no exhaust. The information provided by the best ventless fireplace reviews reveals that, since 99.9% of the heat produced by these heaters goes into the room, it is obvious that they produce more heat than the vented systems. However, there are also a few drawbacks you need to consider before making a purchase.

Positive features of unvented gas logs fireplaces

  • They produce less carbon monoxide which means less pollution.
  • They are more suitable for heating a room than the vented systems
  • Less fuel consumption
  • Easy installation

Negative features of unvented gas logs fireplaces

  • They are illegal in some regions
  • They can produce a slight odor which is similar to kerosene
  • They may introduce moisture into your home

Safety tips

  • These types of fireplaces generate a lot of heat and they can be extremely dangerous if combustibles are too close to the gas log.
  • Keep it open during use.
  • Don’t go to sleep and leave it burning.
  • Ventilates the room while it is burning.
  • Make sure you opt for a device that is approved for the size of the room you will use it.
  • As it was mentioned before, these heaters are not legal in all states, so check with your local council if the installation of a gas appliance is permitted.


As you can see, an unvented gas log fireplace can provide you with a lot of benefits. There are also negative aspects to these types of heaters, but the above information will surely help you find the right device for your home.