
The most popular gas logs are vented logs that come in a variety of lengths and tend to be the most realistic in equally varied faux wood types and textures. These logs are for fireplaces with open dampers as they burn gas much like real logs; more than 80 percent of the fire’s heat is released through the chimney.
Ventless logs are made for fireplaces with a closed or no damper, such as an apartment fireplace. While less diverse in simulated wood styles than vented logs, ventless gas logs are more fuel efficient.
Partially vented logs, as their name suggests, can be used with a damper only partially open.
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