As specialists in the fields of ventilation and indoor air quality, J. R. Bolton discourages vent free products. It is always better to install a vented product when feasible. While vent free products burn fairly clean and are safe, the American Lung Association advises against the use of these appliances. In 1998, Consumer Reports did a small story on their testing of Vent-Free appliances. They concluded “our tests confirm that these heaters contribute significantly to indoor air pollution. If you are planning to buy a gas fireplace, a vented model should be your first choice.” ¶That being said, vent free options are still available. Simply, make sure you are fully educated before making a decision on your hearth product. We are here to answer any questions you may have.