Vented & Direct Vent
Inserts are complete units that fit into existing fireplaces. They require no additions such as glass doors or screens, and consist of a combustion chamber with gas logs. They are usually installed in an existing chimney, provided an approved flue liner is installed. Inserts are typically available for a vented or direct vent application.
Vented Gas Fireplaces
Uses air cooled pipe (B-vent), or gas flue liners to vent appliances. These types of appliances use room air for combustion and exhaust through the B-vent pipe or flexible gas liner. Vented appliances are not as restricted in venting length as compared to direct vent appliances and can use existing chimney systems by running gas flex liner into existing chimneys and terminating with a raincap and flashing.
Direct Vent Fireplace Insert
Uses a dual vent system, generally two 3" flex gas lines, one pipe is for exhaust, while the other pipe brings in outside air for combustion. The design of these inserts allows for a completely sealed system that does not compromise inside air quality of your home.
IDV33/IDV36 featured above