Propane Gas Vented Log Sets operate with an open chimney flue, or damper, and connect to a propane gas source. Vented Log Sets generally feature a large, dancing, yellow flame that will replicate a real fire. This flame is achieved by burning the gas at a lower temperature, which is able to happen because exhaust fumes and pollutants are vented outside your home. However, whenever you exhaust anything to the outside, you lose heat, so a Propane Gas Vented Log Set will be less efficient than a vent-free counterpart. For most of our customers who already have a primary heating source in their home, this is not an issue. For more information, visit our Venting Options page or call us at (877)669-4669 and speak with one of our knowledgeable representatives today.