Vented Log Sets Just like a traditional wood-burning fire, vented gas logs produce carbon monoxide emissions. For this reason, they require a chimney or flue to operate. Because they require a chimney or flue to operate, some of the generated heat will inevitably escape from your home.Click to see full answer. Keeping this in view, do Vented gas logs give off heat?A vented gas log must be used in a regular fireplace, designed to burn a wood fire. Some vented gas logs will give up to 25,000 BTU’s of heat but most don’t give hardly any heat.Also Know, do gas fireplaces generate heat? Direct-vent gas fireplaces are recommended for their efficiency; 70 percent of the heat they generate remains in the house. These units are also effective for zone heating because people absorb the radiant heat from the glass front while the firebox also heats the air in the room. Also to know is, how do I know if my gas logs are vented or unvented? Follow the gas line from beneath the logs to where it disappears in the wall or floor. If the gas is merely contained by a simple gas line, then the logs are vent free. If there is a small cylinder attached to the gas line, then the logs are vent-free.How are gas logs vented?Vented gas logs burn like a real wood fire with a yellow flame that produces smoke. They must be burned in a wood burning fireplace with the damper open, so smoke goes up the flue along with most of the heat. You can burn them with the damper closed to heat your room.
