Dampen your wood stove only after the fire is burning brightly and the firebox, chimney, and wood load are fully preheated (typically reaching a surface temperature of 500∘F 500∘F to 550∘F 550∘F). Closing the damper too early restricts oxygen, causing smoldering, heavy creosote buildup, and poor combustion.
When the fire is out and the ashes are cool, it is safe to close the damper completely. Doing so will prevent drafts from entering your home and heat escaping the chimney. It also helps keep out unwanted pests and debris.
The 3-2-10 rule is the standard safety and building code for wood stove and fireplace chimney heights. It ensures your chimney drafts efficiently and keeps burning embers safely away from your roof to prevent fires.
A fully open damper allows maximum airflow, making the fire burn hotter and faster. If you want a slower burn or a fire that lasts longer, you can partially close the damper to reduce the oxygen supply. Just be careful not to close it too much because it can lead to poor combustion and smoke buildup.
Buildings are divided into fire-resisting compartments using walls, floors and ceilings designed to resist fire for a set period, typically 30, 60 or 120 minutes. Fire dampers exist to ensure that ventilation systems do not undermine this compartmentation.
How to Do It: Wait until all embers have extinguished and the fireplace is no longer warm to the touch. Closing the damper too soon can trap smoke and carbon monoxide inside your home, creating a dangerous situation. Safety Tip: Always double-check that the fire is completely out before closing the damper.
In their ratings, UL determines to what temperatures the safe will stand up to and for how long. Most home safes out in the market provide up to 30 minutes of fire resistance, which is usually enough to protect most contents.
The worst firewood to burn falls into two categories: toxic and highly inefficient. You should never burn wood that produces dangerous chemical fumes or excessive smoke, nor wood that burns too quickly or spits hazardous sparks.
Should a furnace damper be open or closed in winter? During winter, it's usually best to close dampers that lead to the upper floors of the home. However, you may want to slightly open the dampers for maximum comfort.
Heat loss.
Air entering through the open door cools the stove and reduces its radiant heat. In other words, your modern wood stove becomes even less efficient.
Additionally, in the early 1980's, tests were conducted to discover which kind of wood created the most creosote in a regular “open” fireplace. The results were surprising. Contrary to popular opinion, the hardwood's, like oak and poplar, created more creosote than the softwoods, like tamarack and pine.
Yes, mice absolutely can and do come down chimneys, utilizing them as warm, sheltered, and vertical pathways to enter homes. Mice are excellent climbers that can scale the exterior brickwork, enter through gaps or cracks, and move down the flue into the fireplace or attic.
Thankfully, it's perfectly safe to leave your wood-burning stove on overnight or when you leave the house. In fact, it's probably safer than trying to extinguish the flames before bed – throwing water on a fire can kick up smoke and smothering the flames is a fire risk.
Creosote ignites and burns off at approximately 450∘F to 500∘F (232∘C to 260∘C). However, completely eradicating thick, heavy buildup typically requires sustained flue temperatures exceeding 1,000∘F to 1,200∘F (538∘F to 649∘C).
The biggest mistake? Using logs that simply aren't dry enough. Firewood with high moisture content produces more smoke, less heat and leaves behind sticky tar (creosote) in your flue and burner. It also makes lighting your fire harder, wastes energy and can even damage your stove.
A wood stove damper controls the amount of air fueling the fire and the speed at which exhaust escapes. Always open it fully to start or refuel a fire, and partially close it to slow the burn and retain heat once the wood is actively burning.
It is OK to set your thermostat to 74°F if you're happy with that temperature. However, many people find temperatures between 68°F–72°F more comfortable for everyday living. If efficiency is a concern, you might want to consider lowering the temperature by a few degrees to save energy.
On average, furnaces should kick on and turn off anywhere from three to eight times per hour. However, if your furnace turns on and off more frequently, don't assume the furnace is short cycling just yet.
In winter, the damper should remain closed when the fireplace isn't in use. Open it only when you're actively burning a fire and close it again afterward.
The absolute hottest burning firewood in North America is Osage Orange (also known as hedge apple or bois d'arc). It produces up to 32.9 million BTUs per cord. Other premium, ultra-dense hardwoods like Black Locust and Hickory are tied for a close second, outputting around 26 to 30 million BTUs per cord.
According to the Chimney Safety Institute of America (CSIA) and the National Fire Protection Association (NFPA), all chimneys should be inspected at least once a year. Cleaning depends on use:
It is illegal to burn any wood that has been treated, painted, or glued, as well as poisonous plants and driftwood. Burning these materials releases toxic chemicals, heavy metals, and hazardous fumes into the air.
This rule is a guideline for extreme fire behavior: If the temperature is above 30ºC (86ºF), humidity is 30% or lower, and wind speed is 30 km/hr (19 mph) or higher, there's an increased fire risk.
Position the safe carefully so it won't be easily discovered. Don't place it in your bedroom as this is the first place a burglar will look. Be sure to effectively secure your safe by bolting it to a wall or floor. For more information on safes, see Secured by Design.
It is dangerous to wedge or prop open fire doors as the safety of occupants cannot be guaranteed if there is a fire. Fire doors need to be closed to prevent the spread of fire and smoke.