P
Pulse Beacon

What does the damper do on a wood stove

Author

Ethan Hayes

Published Apr 12, 2026

The damper retains heat that escapes up the chimney or flue. It allows this heat to dissipate into the area being heated by the woodstove. A damper should always be fully opened when starting a fire or adding wood to the stove, allowing the firebox to draw the most air.

Does a wood stove burn hotter with the damper open or closed?

Determine which position is open and which closes the damper for your particular stove. Open the damper all the way, if you are lighting a fire. … If the damper is more than halfway open there will be too much airflow to produce heat, but it will keep a flame raging and consuming wood.

Can you leave damper open overnight?

Leave the damper open overnight. Yes, you will lose some heat up the flue, but you will save the occupants of the home from poisoning by colorless, odorless carbon monoxide. … Only when they are completely cold to the touch is it safe to shut the fireplace damper.

When should I close the damper on my wood stove?

If you’re burning wood in your stove, you should make sure that the damper is open. If you close the stove’s damper when you have a fire burning you could be putting yourself at risk, not only of fire hazards but also of carbon monoxide poisoning. When you have extinguished the fire, you can close the stove’s damper.

Can you close a damper all the way?

Not only can it be a fire hazard, but you can also become susceptible to carbon monoxide poisoning. Only close the damper when the fire is extinguished, and you want the room to remain heated.

How do I stop the glass on my wood burner going black?

Try burning harder woods like oak, cherry, or walnut, and avoid burning woods known for their higher sap content. If your wood stove has a heat setting, try turning the heat controls up a few notches. Hotter fires will keep your glass cleaner.

How do I make my stove hotter?

  1. Allow the room where the wood burning stove is located to cool off to 70 degrees Fahrenheit or lower. …
  2. Remove all ashes from the inside of the wood burning stove. …
  3. Insert a fireback made of sheet metal in the back of the wood burning stove. …
  4. Select well-seasoned, dry hardwood.

What is the difference between a damper and a flue?

The flue is simply the open middle of the chimney that the smoke goes up. … A damper is intended to shut off– either fully or partially- the chimney flue. The reason you’d want to do that is to keep heat ($$$) from escaping up the chimney.

How do I make my wood stove hotter?

The Air Vents Aren’t Open Enough A larger supply of oxygen to the fire through the air vents helps the fire to burn through the wood more quickly, and in turn produce more heat. If your wood stove isn’t getting hot, try opening up the air vents on the stove to allow more oxygen to get to the fire.

Do you leave the doors open on a log burner?

Wood burning stoves are not designed to be used with the door open. You can use a wood burning stove with the door open but doing so will lose the control of the air flow into the stove, making it operate less efficiently and sending more heat up the chimney rather than out into the room.

Article first time published on

How far should I open my damper?

The damper should always be fully open before lighting a fire and when the fireplace is in use. Close it when it’s not it use. Operating the fireplace with the damper partially closed will not generate more heat. Instead, blocking the passage through the flue will result in smoke entering the home.

Is it safe to leave a wood stove burning overnight?

Yes, you can leave a wood burning stove on overnight. I have done this many times as have other people I know. However, you need to be careful about ventilation. Typically, if you are leaving a wood burning stove on overnight, you will close off both the air intake and the flue, so that the wood burns very slowly.

Should damper be open or closed in summer?

Even if you have a chimney cap, it is a good idea to keep the damper closed in the summer. Chimney caps can become damaged creating a pathway for rainwater or pests to get into your chimney. Closing the damper will ensure that they can’t get into your home through the fireplace.

How do I make my stove fire last all night?

  1. Rake the charcoal towards the front of the wood stove.
  2. Place five to seven large logs in a tight formation behind the coals.
  3. Shut the door and enjoy.

How close to stove should damper be?

A damper is usually located approximately 12 to 18 inches from the stove, prior to the spot where the pipe exits into a chimney, if present. The damper retains heat that escapes up the chimney or flue. It allows this heat to dissipate into the area being heated by the woodstove.

How do I get the heat out of my fireplace?

  1. Do a damper check. If you think about it logically, the chimney allows airflow so that smoke can escape when you light a fire, but when not in use, you’re letting the warm air from your home out. …
  2. Caulk it. …
  3. Keep heat in. …
  4. Install a heat exchanger. …
  5. Seal it.

Why does my wood stove have two dampers?

Modern Stoves Open both front dampers completely before starting a fire. Modern, efficient wood stoves have dampers below the firebox, or combustion chamber, to supply air directly to the fuel source as well as an additional damper on the door to supply air to allow combustion of gasses released by the burning wood.

How do I make my stove flame bigger?

You can increase the gas volume by removing the handles that control the burner. You will find a screw inside the opening in the stove and adjust the flame with a very small slotted screw driver. The burner will need to be on when doing this to adjust the size of the flame.

What temperature is too hot for a wood stove?

How hot is too hot when it comes to wood fire stoves and fireplaces? Anything over 800°F is starting to get too hot and could damage your wood stove or fireplace.

Why won't my wood burn in the fireplace?

If your firewood is smoking but not getting fired up, it could be because the firewood isn’t seasoned. Not all firewood is ready for the fireplace. When wood is fresh cut, it’s brimming with moisture. … It could be that your firewood is seasoned but has gotten too cold outside.

What dissolves creosote?

Creosote is moderately soluble in water. Spraying water onto the creosote will help to remove the liquid. However, creosote is a type of oil that is never removed fully by water. Bleach and industrial cleaners will help to pull the creosote out of clothes and off of skin or other surfaces.

Why does the glass door on my wood burner go black?

Perhaps the main cause of blackening of stove glass is the burning of unseasoned wood. … This causes an incomplete burn and results in excessive smoke being produced. This settles in the form of soot, tar and creosote inside the flue system and, you guessed it, on the glass.

Can you burn turf in a wood burning stove?

A wood burning stove will burn logs, turf and briquettes. A wood PELLET stove will burn pellets only.

How do you make logs burn slower?

Build fires using the top-down method to slow down a fire right from the start. Burn wood that is between the recommended 15% and 20% moisture content for firewood rather than really dry wood. Try to use hardwood logs in your fire instead of using softwood logs as they can burn for longer periods of time.

What should you not burn in a wood stove?

  • Wet wood. Wet, or unseasoned, firewood can contain up to 45 percent water. …
  • Christmas trees. …
  • Painted or treated lumber. …
  • Any type of paper with colored print. …
  • Plywood, particle board, or chipboard. …
  • Fire accelerants or fire starters. …
  • Plastics. …
  • Dyer lint.

Why are my logs not burning?

If your logs won’t catch fire, it may be that you have started too big. Light some kindling wood or paper first, and wait for it to catch fire to some small logs or pieces of coal. … If you overload your wood burner with logs, the lack of air circulation can also cause your fire to go out.

Can you use a fireplace without a damper?

Does My Chimney Have a Fireplace Damper? … And while older wood-burning fireplaces can function safely without a damper (gas fireplaces cannot), a chimney without a damper is just a gaping hole in the roof of your house. It’s a gateway for frigid air to enter and for heated air to escape in the winter.

How do I keep my fireplace damper open?

You should turn the knob clockwise, as far as it can go, or push the rod all the way up to open the damper. If there is a metal chain in or besides your fireplace, it means that your chimney has a top-mounted damper. If the chain is tightly attached to a hook, the damper is closed.

How do you know if your fireplace damper is open?

Conduct a visual check. Lean in under your chimney just outside of your wood burning stove. You should find a metal device just within the chimney or flue opening. The damper is open if you can see through the damper up to your chimney. If you only see a metal plate, the damper is in a closed position.

Do you need a carbon monoxide detector with a log burner?

If your wood-burning stove was installed after October 2010 then you must have a carbon monoxide detector installed, too. It is a legal requirement. … Whether on the ceiling or the wall, the horizontal distance between the carbon monoxide alarm and the woodburner should be between 1m and 3m.

Do wood burning stoves give off carbon monoxide?

The direct answer to the question above is: yes. Your gas, pellet or wood burning stove, insert or fireplace will produce carbon monoxide. All heating appliances should be vented to the outside. This is why it’s always a good idea to have any heating equipment checked by a professional prior to the heating season.