When a chimney is filled with hot gas, that gas tends to rise because it is less dense than the air outside the house. The rising hot gas creates a pressure difference called draft which draws combustion air into the appliance and expels the exhaust gas outside.
Warm the Metal Chimney
- Roll a piece of newspaper into a tube.
- Hold the flame directly under the flue system.
- Light a fire in the firebox immediately after warming the flue system.
- Place a brick under each leg of the fire grate.
- Light the fire and watch to see if the smoke goes up the flue system.
One may also ask, how does my fireplace work? A fireplace creates a column of heated gas inside the chimney. As that air rises, more heated air from the fire is pulled after it. The result is a draft — a steady flow of smoke and hot gases — up the chimney. As the hot gas rises, it pulls fresh air into the pile of burning fuel.
People also ask, why is there a draft from my fireplace?
Problems occur when the hot air wants to leave through the chimney flue but there is negative air pressure in the room and it is prevented from leaving. This causes a back draft in which the air that is meant to leave through the top of the chimney reverses and enters the home instead.
Does a taller chimney draft better?
Obviously in a chimney fire, the wood is the fuel and a match is the flame so the air providing the oxygen comes in the form of the draft. The reason that a taller chimney creates a better draft is really rather simple as the higher up in the atmosphere the chimney reaches, the greater the differential pressure.
How can I improve my chimney draw?
10 tips to improve the draft of the chimney of the open fireplace Ensure a fast, hot start to the fire. Only burn wood that has been dried for two years. Keep a fireplace fire going with bellows or a blow poker. Build fires on andirons and/or fireplace grate or a fire basket. Increase the height of the fireplace grate or of the fire basket.
How do I stop my fireplace Backdraft?
When lighting the fire, use newspaper and small kindling to produce a high flame to raise the chimney temperature faster and jump-start the draft effect. Also, you may need a combustion air source to help maintain the draft. Try partially opening a window in the same room as the fireplace.
Why does my fire go out when I close the door?
This can occur due to several factors: The fire was not burning hot enough to produce the draft needed to pull the air into the fireplace. Feed more dry wood kindling before closing down the stove. Open the air shutter all the way to get the fire burning briskly before shutting it down.
What causes a fireplace not to draw?
Chimney needs to be cleaned: Creosote build up in the chimney can reduce the the flow of exhaust gasses which can cause fireplace smoke and may also lead to a chimney fire. A shattered chimney flue can also cause drafting problems. Such a fire simply can’t generate sufficient heat to allow the chimney to draw well.
Does a chimney cap Reduce draft?
In addition to protecting your fireplace system from moisture, animals, and debris, chimney caps can also help improve fireplace drafting. The presence of a chimney cap does not eliminate draft issues, however. There are a number of draft issues that can occur even with a chimney cap.
Should you open a window when you have a fire in the fireplace?
Open a window when using the fireplace to prevent the room from becoming smoky. The air coming in from the window will go up the chimney. Before making a fire, open the glass doors, pull aside the screen curtains, and place the kindling, newspaper and logs inside. The window needs to be open only a few inches.
How do I keep cold air from coming in my fireplace?
Pillows, Plugs and Balloons These reusable plastic devices fit inside the chimney above the firebox. Pumping this up with air expands its size to fill the inside of the chimney, cutting off air from the outside. Deflating it allows it to be easily pulled down and removed when it’s time to use the fireplace.
How do you fix a draft on a gas fireplace?
Another great solution for preventing these drafts is to install a direct vent gas insert. A direct vent gas insert will stop those pesky drafts because the insert fits snugly inside the fireplace opening and the insert itself is a sealed firebox.
How do you seal a fireplace draft?
You can seal off an unused fireplace by installing wood or light-gauge metal framing, insulation and drywall over the entire wall or opening. If you intend on using it in the future, install an insert constructed out of 2″ rigid foam board glued to MDF. Seal around the insert using neoprene backer rod insulation.
Why is cold air coming out of my fireplace?
A damper is a metal flap in your chimney that blocks cold air from coming in and warm air from escaping. If you have the damper closed, but cold air still sweeps across the room, it’s very likely that your damper is worn, cracked, warped, or generally degraded.
Does fireplace draw heat out house?
A–Although they add a nice warm glow to a room, a fireplace, especially a wood-burning fireplace, usually draws more heat out of a home than it adds. Almost all of the heat generated by the fire is also sucked up that chimney and out of the house. It’s the furnace or boiler warmth that you should be concerned about.
How do you maintain a fireplace?
9 Tips for Maintaining a Wood Burning Fireplace Clean the interior. Burning of woods in our fireplaces often cause deposit and buildup of a variety of dirt, dust, ash, and creosote. Install Heat Proof Glass Doors and Blower or Fan. Watch for Smoke. Burn the Right Wood. Look for Soot. Remove Creosote. Check the Cap. Inspect Your Chimney.