New! The Classic Outdoor Wood Furnace has come to town! A safe, efficient outdoor furnace that can provide 100% of your heating needs. Central Boiler manufactures and distributes the Classic Outdoor Wood Furnace. Heats multiple buildings, hot tubs, pools, greenhouses, domestic water and more. Come by and take a look!
Wood Heat: Good For You, Good For Our Environment!
A wood heating system is the right choice for the increasing number of people who are concerned about our environment. Unlike systems that rely on fossil fuels, wood is a totally renewable resource, which, when burned, results in no net carbon dioxide increase. Carbon dioxide is part of the natural plant-growth cycle and occurs naturally when trees are allowed to rot on the forest floor. On the other hand, fossil fuels, when burned, release carbon dioxide which otherwise would stay trapped in the earth. This causes a net increase in carbon dioxide, which is believed to be responsible for the heat-trapping "greenhouse effect." In addition, harvesting firewood has a pruning effect on forests, which allows new growth to flourish. And the wood you burn most likely comes from your local area -- it's not imported, as is the case with oil.
"Before, with our two indoor wood stoves, we had problems with smoke in the house, soot, and dirt. We were concerned about how safe they were, and we had to load them every three hours. With our Central Boiler Classic outdoor wood furnace, we feel much safer, and we only have to load it about every two days. Also, my son has asthma, and since we got the outdoor furnace, he's had fewer problems. I think it's because the air is much cleaner inside now. That was a real unexpected benefit. Probably the best one of all." - Amy R. New Carlisle, Quebec
Eliminates your heating bill...For many owners that cut their own wood, or use scrap wood, they can entirely eliminate their heating bills. Outdoor Furnace Best Burn Practices: Central Boiler, in partnership with our industry association, the Hearth, Patio and Barbeque Association (HPBA), recommends following the Outdoor Furnace Best Burn Practices, and the owner's manual. The document mentioned in the paragraph above requires the Adobe Acrobat Reader plug-in. For more information on the plug-in, click here.
Did you know...Using wood as a heating fuel is endorsed by the U.S. Forestry Service. By burning wood, a renewable resource, an average home will save enough nonrenewable fossil fuel to operate an automobile for a full year. Classic Advantages The Classic provides the warmth, comfort, and economic advantages of burning wood -- without the mess, inconvenience, and dangers posed by indoor burning.
Indoor Or Outdoor Burning? Be Safe At Home

Safety is a major consideration when it comes to burning wood as a heat source. An estimated 73,800 home heating fires in 1994 killed 487 people and injured almost 2,000 people. But the Classic removes the fire hazard from the home or building being heated -- all burning takes place remotely, up to 500 feet away. There's no indoor burning, indoor smoke, and no threat of a devastating chimney fire. Also, indoor burning can affect air quality, and even create a dangerous buildup of carbon monoxide. With the Classic, these problems are eliminated. You get clean, comfortable warmth -- and peace of mind. All of the Classic models have been tested and listed to UL and CSA standards, except the Pallet Burner which is listed by OMNI.
Energy Costs: Get A Handle On Your Heating Bills
Energy costs are a major household or business expenditure, especially in harsher winter climates. As a fuel source, wood -- in addition to being readily available and totally renewable -- is also very inexpensive compared to other fuel sources. In fact, the energy savings realized by heating with the Classic can often pay back the purchase price in the first two years. By adding a domestic water-to-water heat exchanger, the Classic can also provide all of your hot water. You can then turn your water heater off and realize big savings on your electric or gas bill. Over a ten-year period, a homeowner or business may save $10,000 to $50,000 or more on heating costs.
Efficiency Means More Heat From Less Wood
The Classic outdoor wood furnace is the most efficient outdoor wood furnace, and has the lowest emissions. The Classic's energy efficient design maximizes the combustion and heat transfer process for better heat delivery. In other words, the Classic burns wood more completely and efficiently, and transfers more of the heat generated to your home. Current owners of the Classic report that they are using up to 25 to 50 percent less wood compared to traditional heating alternatives or other brands of outdoor wood furnaces. Indoor wood stoves can be less efficient because heated indoor air used for combustion is sent out the chimney, causing cold air to be drawn into the house to replace it.
It's Your Home. Why Not Enjoy It?
Your home is one of your biggest investments. It's where your family spends a considerable amount of time. And you spend a considerable amount of money making it comfortable and enjoyable. Firewood can be dirty, moldy and riddled with insects which can create a mess in your home. Burning wood indoors means smoke, ashes, odors, and an eventual buildup of soot on walls and ceilings. With the Classic, you avoid all of these problems because you don't have to bring firewood inside, and all burning takes place remotely, up to 500 feet away. Many Classic customers have also noticed that eliminating indoor burning has helped alleviate respiratory and allergy problems caused by exposure to moldy firewood, smoke, and ashes.
Burn Wood, Not Your Spare Time
Continuous stoking of wood is a necessary part of fireplace and wood stove use. If you don't have the time or energy to continually babysit these heat sources, the Classic is your low-maintenance alternative. It burns larger pieces of wood -- up to 30 inches in diameter and 72 inches in length -- and there's no splitting, which dramatically reduces the time spent preparing the wood. The Classic also operates efficiently using seasoned or unseasoned wood. The large firebox door is designed for easy loading of wood and removal of ash. There's no costly chimney cleaning or upkeep, and other maintenance is simple, requiring only minutes to perform. Tests show the Classic is the most efficient outdoor wood furnace, with the fewest emissions. You can view the results of those comprehensive tests on the Efficiency Tests page.
How Heat From The Classic Gets To Your Home
- The Classic can be located up to 500 feet away from the home or building being heated.
- Heated water from the Classic is pumped to the home or building through insulated, underground ThermoPEX piping - the most efficient way to move heat over distances.
- The Classic is designed to work with any existing heating system. A heat exchanger or direct circulation conveys the heat into a forced-air furnace, radiant baseboard, or radiant floor heating system. This gives you normal thermostatic temperature control.
- The Classic can provide heat for all your domestic hot water by adding a water-to-water heat exchanger. You can turn off your hot water heater and save $30 to $80 or more per month!
"Very happy with Central Boiler furnace. The wood and mess are all outside, also house is very comfortable. We really like the fact that wood does not need to be split."
Bruce K., Bomanville, Ontario
In addition to heating an entire home or building, the same Classic unit can also be used to heat other buildings such as a garage, workshop, shed, greenhouse or barn -- without using other heating sources. It can even be used to heat a swimming pool or hot tub.
Top Performance With Any Existing Heating System
The Inside Story On Outdoor Wood Furnaces
The Central Boiler Classic® models are engineered to be the most efficient outdoor wood furnaces available while providing the best durability, low maintenance features, and an appealing fit and finish. Models are available in a choice of heavy gauge carbon steel (CL and PB Models) or titanium enhanced stainless steel (SCL Models). Carbon steel models have proven their durability over many years of service. The SCL models offer a stainless steel choice with the entire firebox/water jacket assemblies constructed of titanium enhanced stainless steel that meets the stringent ASTM requirements for the correct alloy composition on all heat lots. The Classic models are available in a choice of 9 different colors with the exception of the CL 7260 and the Pallet Burner which are available in charcoal.
All of our models are available with a Dual Fuel Ready option (standard on the Pallet Burner). Talk to your local dealer for more information.
"Buying the Classic Central Boiler is one of the best decisions I have made toward achieving my goal of creating a totally self suffient farmstead. I have a free supply of wood so my heat and hot water cost me zero. Since installing the Boiler I save between $300 and $400 per month by not having to purchase propane. The return on investment is immediate and substantial and soon to be money in the bank."
Dwight J., Buffalo, New York
Color Options
Because of property owner's varying tastes when it comes to color preference, Central Boiler outdoor wood furnaces are available in several color options.
|
|
|
|
|
|
|
|
|
Charcoal |
Forest
Green |
Brown |
Red |
Mocha
Tan |
Ocean
Blue |
White |
Black |
|
Note: Any variations in colors shown are due to variations in monitor resolution.
The Classic Efficiency Tests: What size furnace do you need? Use our Sizing Chart to find the model that will best meet your heating needs. Please be sure to consult your dealer when sizing. (Chart is a JPEG image).
- Poorly insulated home with high heat loss- 12 hour burn time at -20F
- Well insulated home with minimal heat loss- 48 hour burn time at -20F
- Home, workshop and domestic hot water- 24-48 hour burn times.
- Home, garage, swimming pool- 24 hour burn time.
- Well insulated low heat loss home- 96 hour burn time.
*Burn times per load vary based on heat demand.


- Secondary burn area.
- Ripple Top® heat transfer for ultimate heat extraction.
- Insulated, cast iron door.
- Automatic draft.
- Skid base, no concrete base needed.
- Vent design eliminates evaporation.
- Type HT listed, factory built, all stainless chimney.
- Large exhaust passage.
- HeatLock Baffle® traps heat and gases for
complete combustion.
- 100% airtight, waterproof urethane insulation.
- Tapered ash pan for easy cleaning.
Fan Draft option available for all models.
 |
Classic CL 4030
Door
Firebox
Heat Transfer Area
Weight
Water Capacity |
|
20"x20"
40"x30"x26"
52 sq. ft.
1,350 lbs.
140 Gallons |
|
| |
|
|
| |
|
 |
Classic CL 5036
(250,000 Max Btu**)
Door
Firebox
Heat Transfer Area
Weight
Water Capacity |
|
23"x23"
50"x36"x30"
74 sq. ft.
1,670 lbs.
196 Gallons |
*Replaces up to 250 gallons of fuel oil per month. |
| |
|
|
| |
|
 |
Classic SCL 5036
Titanium Series Stainless (250,000 Max Btu**)
Door
Firebox
Heat Transfer Area
Weight
Water Capacity |
|
23"x23"
50"x36"x30"
74 sq. ft.
1,358 lbs.
196 Gallons |
*Replaces up to 250 gallons of fuel oil per month. |
| |
|
|
| |
|
 |
Classic CL 6048
(500,000 Max Btu**)
Door
Firebox
Heat Transfer Area
Weight
Water Capacity |
|
23"x31"
60"x48"x36"
119 sq. ft.
2,450 lbs.
393 Gallons |
*Replaces up to 500 gallons of fuel oil per month. |
| |
|
|
| |
|
 |
Classic SCL 6048
Titanium Series Stainless (500,000 Max Btu**)
Door
Firebox
Heat Transfer Area
Weight
Water Capacity |
|
23"x31"
60"x48"x36"
119 sq. ft.
1,977 lbs.
393 Gallons |
*Replaces up to 500 gallons of fuel oil per month.
|
| |
|
|
| |
|
 |
Classic CL 7260
(For more than residential heating.)
Door
Firebox
Heat Transfer Area
Weight
Water Capacity |
|
30"x40"
72"x60"x40"
170 sq. ft.
3,910 lbs.
764 Gallons |
*Replaces up to 1,500 gallons of fuel oil per month. |
| |
|
|
| |
|
 |
Pallet Burner
(Business solution for light commercial or industrial use.)
Door
Firebox
Weight
Water Capacity
Heat Transfer Area |
|
54"x50"
72"x66"x54"
4,880 lbs.
556 Gallons
N/A |
*Heating capacity similar to the CL 7260.
*One year warranty. |
*Actual performance examples have been relayed to Central Boiler
by Central Boiler Classic furnace owners.
**Btu ranges vary widely with different types of wood.
|