Bottom Air Vent – The bottom air vent on Old-Style Heatilator Fireplaces are where cool room air is drawn into the fireplace. The air is then routed around the firebox and exits through the top air vent where it returns to the room as heated air.Click to see full answer. Considering this, how do the vents on my fireplace work?A fire crackling in the fireplace adds to the ambiance while the heat it generates helps to warm the area. A closed vent can cause smoke to billow into the room, but using the fireplace vents properly ensures enough air feeds the fire and the smoke escapes up the chimney.Similarly, what is a vented fireplace? A traditional vented gas fireplace (view example on Amazon), fueled by either natural gas or propane, has two vents that run to the exterior of the house. The intake vent draws fresh air into the fireplace while the exhaust vent safely removes fumes of the combustion (burning) process. Accordingly, how do you know if your fireplace vent is open or closed? Perform a visual check. Using a flashlight, poke your head inside the fireplace to look up into the chimney. If you have a throat damper, you can tell if it is closed if you see a barrier above your head. If you can see up into the flue, the damper is open.Does a fireplace need a fresh air vent? Fresh Air Vent Needed for Fireplaces It can easily be 250 to 350 cubic feet of air per minute. The fresh air vent in the hearth may be blocked or it may not be able to supply enough air to satisfy the appetite of the fire. The additional air to feed the fire must come from somewhere.

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