|
Energy
King Furnaces.
Energy King makes heavy duty wood / coal warm air furnaces that meet the
tough demands of cold winters! Many people install them in a 'tandem'
arrangement with their existing oil furnace!
Scandtec Solo Plus
The Scandtec Soloplus features gasification technology! That's when
the exhaust gases of wood combustion are forced into special tunnels lined with
high temperature ceramic and burned very completely. This results in very
high efficiency, less frequent tending, and almost no creosote!
Ashley - Formerly Jensen Furnaces. Jensen furnaces -
(renamed
ASHLEY - a US Stove product )- are popular and economical. Furnaces
and Boilers: 'Solid fuel' furnaces and boilers are
wood-burners, or if design permits
- coal and/or wood burners. 'Multi-fuel' refers to a solid fuel unit with
an oil or gas burning system integrated into it. Some
products can burn pelletized fuel but those that do are engineered for that purpose and most solid fuel appliances will not burn pellets. Furnaces
and boilers are designed to produce heat in one location, and through ducts and
grills (warm air) or pipes, baseboard radiators or cast iron radiators (hot
water), distribute the heat throughout the home. For
these reasons, furnace / boiler installations must be planned with care and cost
of installations are usually significantly more than the cost to install 'space
heaters' such as a woodstove or gas burning stove. Using furnaces and boilers
and associated heat distribution systems is called 'central heating'. Central heating with
solid fuels became less popular when fuel oil prices dropped, in the mid to late
90's. With the resurgence of higher fuel oil costs, interest is growing again. Many
advances and improvements have been made over the years. Furnaces
are being constructed with more serviceable parts and more stainless steel is
used in some units. Boiler designs have advanced to the point where
gasification technology dominates the multi-fuel boiler category. In
gasification, the oxygen required to fire the fuel is controlled and the wood is
'baked' to convert it to burnable gas. When heat is called for, a fan
starts and pulls the heated gases off the wood and sends it through very hot
ceramic tunnels. Here the gases burn in a very high temperature
environment and they burn almost completely. Little residue (creosote)
remains compared to conventional designs. When heat is not called for, the
fan shuts off, oxygen is deprived, and the unit goes 'dormant', waiting for the
next cycle. The efficiencies are much higher than conventional
technologies, but so are the prices. Given the prospects for higher fuel
oil prices, the future looks brighter for gasification. |