Top best answers to the question «Can you leave your gas fireplace on all day»
The 3 basic gas fireplace types
These fireplaces can usually be left running continuously as long as their front glass is properly sealed… As long as their frontal glass is sealed well enough, fireplace inserts can be left running continuously as well.
In most cases, if your fireplace was installed properly, you can leave it on indefinitely. There is no time limit built into the safety requirements for vented gas fireplaces. Gas fireplaces literally run for days when being safety tested.