Chimneys and draft conditions

The main function of a chimney is to generate the necessary train for combustion and to derive the exhaust from the building.
A train is considered good for a good combustion indispensable. As good train in general between 10 and 20 Pa (1-2 mm VC). The train is generated from the chimney, not from the stove or fireplace.

Essential to the train is the construction of the chimney

A tall chimney can produce more train at inadequate train the solution from the construction of a high chimney exist. The diameter of the chimney should be no less than the diameter of the flue pipe connection at the furnace or chimney fireplace. A circular inner tube usually produces a better train than a square. Through pipe bends will reduce the train.

When bends must be used, we recommend the installation of two 45-degree pieces.

Combustion air is essential for the train

An open fireplace requires about 300 cubic meters of air every hour, while a closed fireplace draws significantly with about 30 cubic meters per hour manages a extractor fan or a fan of more air than a this chimney created in the space one under pressure through this vacuum reaches smoke in the room.
If outside air can pass directly to the fire station, a lack of combustion air is avoided.

Influence of the wind

The train can by high trees, cliffs or tall buildings affected whill.The problem is usually by lengthening the chimney solve.In extreme cases, an exhaust fan installed whill de train of the chimney can be stabilized by a draft regulator.

Train is just hot air rising

High temperatures create a strong good chimney results are achieved if the height and the diameter of the chimney to the fireplace fit.To heavy train will cause the heat to quickly sucked into the chimney maintained.A to train can be strong with a slider to regulate with draft regulators (in the flue pipe or chimney) or throttle valves.
If more than one smoke pipe bends are installed, the train also decreases.

Troubleshooting (wood fireplaces)

The size is important

An oversized furnace can produce soot and smoke problems, while too little oven is often too strong ever fired, which can lead to warped and cracked parts.

What do you want to use the oven?
Heat source
Aesthetics (a piece of furniture)
Main source of heat or reserve

An oversized furnace will not do you any

The furnace constantly receives too little air – this creates a lot of smoke, soot, tar and Ash. When the oven is too little air gets, the glass always dark.

A stove is too small you will not matter

The furnace must constantly generate more heat than it can, why he always fired too strong shall. The result can be cracked and warped parts (burn plates, smoke dampers, etc.), takes over for the Jotul no guarantee.

If the fire to get going badly, can put behind it the following reasons:

Not enough air: Open the Sometimes throttle must also open the door (about 1 cm large gap). Is this ​​make sure that the slide open can also open the door to the ash pan.
Bad chat-Wood: Use small pieces of split wood come-together with crumpled newspaper, and add larger pieces to thinking you remember: The smaller and drier, the better.
Not pulling / cold chimney: Preheat the chimney on by holding a torch made ​​of newspaper up in the oven until the chimney draws.

Smoke in the room can be caused by:

Wood quality: a lot of moisture wood more smoke than the chimney can be derived.
Ventilation systems like air conditioning or exhaust fans in bathrooms or kitchens can (by generating negative pressure) on the chimney with air supply.In these cases, you have to bring outside air to the fireplace.
Operating errors: Always open the damper and primary air control before you load up the stove again. Open the door slowly.
Flue pipes: Remember that smoke affect horizontal flue pipes and pipe bends the train.
A chimney that is too short to train a little too cold for the fireplace. A chimney can cause none – or negative – train. The inner pipe of the chimney must be properly connected to the chimney and the chimney and have the right size.
Maybe the chimney is blocked by bird nests, soot or tar.

Short burn times can be caused by:
Wood load: Large pieces will burn longer than you small.Use hardwood chopped was split and about 12 months stored dry.
Too strong a train in the chimney, which leads to insufficient combustion.
Operating errors: Primary air control should be slowly toward the closed position, and then finally closed when the fire is established.

Let the fire burn for long periods of time with ash pan door open, otherwise the fire burns too strong.

Explosions (gas explosions) can be caused by:
When the air control during reloading of wood in the sometimes combustor you have to wait about 15 minutes before you can close the air control again.
The secondary air supply is possibly clogged with soot or tar.
Moist wood requires a tremendous amount of energy to dry before it can ignite and cause these burns gases in the combustion chamber of an explosion.
Not enough train.

Difficult to control (Overheating)
Defective seals.
Wrong fuel: Never burn old pallets, particle board, waste products or waxed.
Too strong a train in the chimney: Reduce the train with a damper or draft regulator.

Too little heat

The most common reasons for low heating power are:
Wood quality
Not enough train in the chimney
Operational errors
Construction of the building (insulation, ceiling heights, etc.)
Too small oven

When the wood burns slowly at low temperature, it produces tar and other organic vapors, which adheres together with moisture this form soot soot then to the chimney insert walls.

Soot is the food for chimney fires

Too much soot may be caused by:
Wood quality in the wrong size
Not enough train in the chimney
Operational errors
Furnace size (too low temperature)

Be swept before the start of the heating season, the chimney.

Chimney Insert