Gas Fireplace Types

Vented Log Set

Direct Vent
One pane of glass

3-Sided Direct Vent
3 panes of glass
How to locate your gas fireplace data (make/model/serial number)
There is a data plate or data sticker located in the gas fireplace that includes information regarding the fireplace. Don't get this confused with the data plate on your firebox.
Direct vent units have a control access area (below the logs/glass) that house the guts of the fireplace. The data plate is usually on the floor of this area. It is sometimes easier to take a photo of this data plate to view the information.
Vented log sets/Unvented gas fireplaces may have a metal card that is chained to the grate. There is usually a space for this at the rear of the grate. This card may also include lighting instructions. Do not try to locate the card when the fireplace is operational or hot!