Sedore USA
Producers of High Efficiency
Multi-Fuel Biomass Furnace/Boilers
The Sedore Furnace/Boiler - How it Works and Main Construction Features
The Sedore Furnace/Boiler burns environmentally clean with high heating efficiency for fifteen hours on just one load of wood or corn and up to 24 hours on pellets and cubes. The fact that there is no firebrick in this Furnace/Boiler means that the heat radiates out of the Furnace/Boiler and into the room instead of being lost up the chimney. High efficiency heating means that it burns less fuel for the same amount of heat, and therefore fewer trees are cut. Environmentally clean combustion means that the fire is burning all the gases etc., in the Furnace/Boiler, giving you extra heat and leaving little exhaust to clog the chimney and pollute the environment.
The replaceable cast iron baffle liner has a life expectancy of 10 - 15 years.
With fairly dry hardwood the Sedore Furnace/Boiler will produce heat approximately
15 hours unattended; likewise with corn, and up to 24 hours on pellets
and cubes.
The air is admitted through the holes in the crests of the corrugated walls. This provides a cross draft to make the fuel burn away at the bottom of the pile. As the fuel burns away, it is being lowered from above to the fire. This is how long burning is accomplished.
The heat can be regulated from very high to very low.
The heat is constant, because of the steady burning of the fuel.
The Furnace/Boiler will not produce creosote, unless the operator closes off the drafts unreasonably low.
Green and wet wood will burn in the Sedore Furnace/Boiler, if the fire is started with fairly dry wood, because the wood is drying before it reaches the fire, however, green wood is not recommended.
The corrugated walls do not need bricks to prevent warping; the heat transfer is the best possible and the corrugations give more heating area.
The Furnace/Boiler is easy to top load, no stooping or bending, no coals or ashes to spill on the floor. To prevent smoke escaping when the lid is opened, open the damper fully, and slowly lift the lid. In any event, normally there will not be smoke at the time of refueling because there will not be smoke coming from a bed of coals.
The Furnace/Boiler's corrugated walls provide a means of surrounding the fuel with air. Plenty of air is essential for clean burning. All these features are helpful in making a more clean-burning fire.
To start the fire, carefully read the instructions that come with the Furnace/Boiler. You will be amazed at the sure method, and how quickly heat is made.
A roomy ash cleanout is located on the side of the Furnace/Boiler. The difference between the Sedore self-feeding Furnace/Boiler and the old method is that the Sedore Furnace/Boiler burns mostly at the bottom of the fuel pile, providing a small hot fire. The old method for long burns was to fill the Furnace/Boiler full of wood, and nearly close off the air. With a limited amount of air, the result is a smoky creosote-making fire. If plenty of air is admitted for proper burning the whole wood pile will be on fire, the wood is soon gone, and the heat unbearable.
These models are made to last for many years. Sedore Furnace/Boilers carry a rock-solid warranty against manufacturing defects.
The Furnace/Boilers are made of over 1/8 steel, or what is known as 10 gauge. There
is a heavy casting on the back of the fuel chamber. It is 1 foot high, 2/3
of an inch thick at the top and 5/8 of an inch thick at the bottom. This
casting is a corrugated design bolted to the corrugated walls. Retaining
fingers at
the bottom of the dividing wall prevent the fuel from blocking the air flow.
When the fuel pile is narrow it means that the air supply is not burnt off
before reaching the bottom of the baffle. This calls for a construction that
does not cut off the flow of air. The corrugated design of the baffle provides
air channels that supply an abundance of air to make the fire area very hot,
and allows for the fuel and the coals to be pitted up against the baffle
and the retaining fingers, so the heat will be the greatest under the baffle.
The front wall, with its vertical corrugations with air vents in the crests of the corrugations, prevents clogging and provides air channels for the air to surround the fuel. A fire will not burn well if air is not applied properly to the fuel. Since we wish to burn the fuel at the bottom of the pile, it is important that the fuel that is to be burned is in the draft line, this is the area between the air inlets where the flue opening is located.
Because of the Sedore Furnace/Boiler having a cleaner burn a Catalytic Combustor is not recommended. A clean burn makes more heat with less fuel, stops creosote that can cause a chimney fire, prevents the messy creosote smell that comes from leaky Furnace/Boiler pipes, cuts back on chimney cleaning and reduces air pollution. The fact is, where the Sedore Furnace/Boiler has been used over a period of years with chimneys that had a good average draft, the chimneys have yet to be cleaned.
Note from the diagram above how smoke is trapped in the burning chamber. This is because the only exit is at the bottom. The smoke from the fuel will circulate in the burning chamber until all combustibles are burned off. Creosote will collect on the underside of the lid and upper walls of the burning chamber where it does no harm. It will simply dry and flake back into the fire and burn again. The smoke must go through the flame before exiting, so all combustibles are burned off before entering the chimney. The only time the smoke goes through unburned is when the lid is raised, because when the lid is raised a downdraft is caused.