Natural gas and propane-fired direct vent-free standing fireplaces manufactured by CFM Inc. (Majestic Fireplace) that bear the trade names Insta-flame or Northern Flame (Models FSDV22, FSDV30, FSDV32, D222 and D232 Series) should no longer be used. The relief dampers may not function properly, causing the excess gas to ignite and then the glass to explode when lighting the fireplace, posing a serious risk to the safety of Canadians. The word “Series” includes all suffixes and prefixes associated with these models. For example, suffixes to the model number such as "N" could mean natural gas, "T" could be Top Vent and "R" could mean rear vent. These types of variations on the models, among others, would all be included in this advisory. Only models with the letter "R" in the prefix are not included in this advisory.