Posts Tagged ‘Wood Doctor’

Wood Doctor outdoor furnaces burn with little smoke (VIDEOS)

admin | September 3rd, 2010 | No Comments »

Wood Doctor HE10000 Outdoor Furnace Burning


The new generation of outdoor furnaces

admin | March 19th, 2010 | No Comments »

The Wood Doctor Converters that we carry represent the new generation of outdoor furnaces. It burns less wood and is environmentally friendly having little smoke emission. This makes it the only legal choice in New Hampshire and the United States. It converts wood to gas and gas to heat.

How the Wood Doctor Converter Works:

Drying Chamber
In the Wood Doctor Converter, heat that rises is trapped in the Drying Chamber where it dries out the wood and eventually transfers to the water exchanger… No heat or emissions escape out the flue.

Initial Firebox
This is the chamber where the actual fire occurs. In the off cycle the wood burns with no open flame and the heat and creosote smoke rise upwards into the Drying Chamber. In the on cycle the flames are pulled down through the coals creating a very efficient burn. The fire is Upside down. Dry wood is automatically fed as required.

The wood is first placed on a ledge and then tipped into the hopper. This prevents hang-ups. The hopper holds wood up to 26 inches with a total capacity of over 11 cubic feet.

Final Combustion Chamber
This is a separate insulated ceramic chamber underneath the Firebox. The heated air in the firebox, including all smoke gas and creosote, is drawn downwards through the hot bed of coals and into the Final Combustion Chamber. Injection Air is added from above the coals and also pulled through the coals. The extreme heat (up to 2000°) ignites all gases including smoke and creosote. These gases, which would otherwise be exited out the flue, are used as fuel giving nearly 100% burn efficiency. You can expect the Converter to use up to 50% less wood than most wood stoves on the market. Big buildings or small – one size furnace does it all without excess fuel consumption.

Injection Air
A fire needs air to continue burning. The Converter features Air Injection. When the water temperature drops, air is injected into the firebox in measured quantities in just the right location – much like a blacksmith’s forge. The fire burns extremely hot. Upon reaching the preset temperature, the air injection reduces and allows the fire to burn without open flame. During this stage, the heat produced is transferred to the Drying Chamber.


Pros and cons with outdoor boilers

admin | February 15th, 2010 | No Comments »

Small_boiler_picOutdoor boilers, sometimes called outdoor wood furnaces, provide an alternative means to heat your home. Their use is becoming increasingly popular in the Northeast including our lovely State of New Hampshire. There are a number of pluses in using an outdoor boiler as your source of heat.

Outdoor boilers are usually quite large requiring the homeowner to only have to load it once or twice a day. The large size means that large, irregular pieces of wood can be burned. The type of wood is also less important than that of a regular wood stove meaning, the rule about only burning hardwoods and not burning pine is no longer in effect. Without the large chimney, smoke from burning the wood only has a short distance to travel creating significantly less risk for a chimney fire.

In addition, wetter wood can be burned because the large fuel load can offset the lower efficiency of burning unseasoned wood. Along with heating an entire house, outdoor boiler systems can also be used to simultaneously heat shops, garages or barns. Despite the fact that burning wood inside is safe if properly done, many homeowners feel outdoor boilers are safer because the fire is far away from the home. Utilizing an outdoor furnace also removes the risk of carbon monoxide poisoning which can be an issue with oil, gas and propane furnaces in the home.  Finally, because the outdoor boiler keeps the wood outside, there is no bark, dirt and ash mess to clean up inside the house.

The biggest downside to outdoor boilers is that they require electricity to run the water-circulation pumps and fans. They don’t provide the same insurance against power outages that a normal wood stove does but is nothing new to those homeowners that rely on gas, propane or oil furnaces. Typically homeowners who experience regular power outages already have a generator that supplies electricity to maintain their furnace.