To determine the right size gas logs to buy, you must measure your fireplace's interior dimensions—specifically the —and then account for mandatory safety clearances based on your chosen control valve system. 1. Essential Measurements
Subtract 4 inches from your front width.
How To Measure for and Choose a Gas Log Set - Fireplace Doors Online
Measure across the front opening from one side to the other.
Before shopping, use a tape measure to record these four dimensions in your firebox:
Subtract 8 inches from your front width to allow for the pilot kit.
Measure across the back wall of the fireplace.
