Place gas fireplace logs directly on the log grate and arrange them according to the manufacturer's guidelines found in the installation manual. The number of logs to be used is determined by the type of set and can range from four to nine logs.
In most cases, it is not safe to use gas logs in gas fireplaces. Gas logs are made to be installed in wood-burning fireplaces that have been converted to gas. Burn vented and ventless gas logs in a fireplace capable of burning wood. Burn vented gas logs with the chimney damper open, and burn ventless gas logs with the damper closed.