"The Classic way to heat any home or building." MODELS "We didn't invent fire, just
        better ways to use it."
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Central Boiler Classic® Models

Our Classic models are manufactured using heavy gauge carbon steel and have proven their durability over many years of service. The Classic models are available in a choice of 8 different colors with the exception of the CL 7260 and the Pallet Burner which are available in charcoal. All of the Classic models are available as a Dual Fuel Ready Model (standard on the CL 7260 and Pallet Burner). Fuel Burner is sold seperately. Talk to your local dealer for more information.

Classic Model specifications are listed below, or return to the Products page for more Central Boiler furnace models and accessories.

"I live in the country in northern Illinois. In January I received my LP gas bill of $647.00 for about 30 days. That day I decided it was time to make the investment to purchase a wood boiler. I settled on a Central Boiler model. It is the best investment I have made in a long time. I figured it will pay for itself in three years. We keep our house 74 degrees now instead of 70 and our hot water is free. Your product is well engineered and built!"

Ron, IL


Classic CL 4030

Please contact your local dealer for current pricing.

Heat Transfer Area
Water Capacity
52 sq. ft.
1,350 lbs.
140 Gallons



Classic CL 5036

Please contact your local dealer for current pricing.

Heat Transfer Area
Water Capacity
74 sq. ft.
1,670 lbs.
196 Gallons

  Replaces up to 300 gallons of fuel oil per month.


Classic CL 6048

Please contact your local dealer for current pricing.

Heat Transfer Area
Water Capacity
119 sq. ft.
2,450 lbs.
393 Gallons

  Replaces up to 600 gallons of fuel oil per month.


Classic CL 7260
(For more than residential heating.)

Please contact your local dealer for current pricing.

Heat Transfer Area
Water Capacity
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.)

Please contact your local dealer for current pricing.

Water Capacity
4,880 lbs.
556 Gallons

  Heating capacity similar to the CL 7260.
  One year warranty.

Please contact your local dealer for current pricing
as pricing may vary based on a variety of factors.
Product availability is subject to change without notice.

Actual performance examples have been relayed to Central Boiler
by Central Boiler Classic furnace owners.

** Financing available at participating dealers with approved credit.

†† Instant rebate savings on select in-stock
Central Boiler Classic outdoor furnace models. Savings shown
is on a CL 7260 model. See dealer for details.

 Actual Classic Owner Testimonials :

       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.


Classic Model Features

1. Vent Cap: Design eliminates evaporation.
2. High Capacity Water Jacket: Receives multiple tests to ensure welding integrity. Certified high quality steel used - no mixed metals.
3. Ripple Top® Design: For increased heat transfer area and lower maintenance.
4. Large, Insulated Cast-Iron Door: Ergonomically designed with a large door for easy loading. Door is insulated for maximum efficiency. Door parts are powder coated for increased paint durability.
5. Automatic Draft Control: Thermostatically controls water temperature in system.
6. Skid Base Framework: Makes installation easy with or without cement foundation. Only the CL 7260 and Pallet Burner require a slab.
7. Welded Steel Framework: Heavy-gauge framework engineered for enhanced strength of side panels and roof.
8. Insulated Chimney: The chimney is a type HT listed factory-built chimney for wood burning appliances. Two 4-foot chimney sections standard.
9. Rear Exhaust Outlet: Increases efficiency. Eliminates leaks and corrosion that competitors experience from chimneys that exit through the roof. Designed for easy inspection. Reduces heat loss by over 50%.
10. Water-Filled HeatLock Baffle™: Creates secondary combustion area. Traps heat in firebox - will not warp or burn out with extreme heat.
11. Urethane Foam Insulation: Insulation is sprayed on and forms a 100% airtight seal around the water jacket.
12. Rectangular Firebox: Engineered with stay pins- will not collapse like round designs can.
13. Ash Pan: 3/8" thick, formed ash pan is durable and easy to clean.

- Fan Draft option available for all models.

- A dual fuel ready option is also available which allows the furnace to be fitted with a fuel oil, natural gas, or propane burner.

Color Options

Because property owners' tastes vary when it comes to color preference, Central Boiler outdoor wood furnaces are available in several color options.
BrownRed Ocean
Note: Any variations in colors shown are due to variations in monitor resolution.

What size furnace do you need? Use our Furnace Sizing Chart or our
Energy Savings and Payment Calculator to find the model that will best meet your
heating needs. Please be sure to consult your dealer when sizing. (Chart is a PDF).

A safe, efficient outdoor wood furnace that can provide 100% of your heating needs. Central Boiler manufactures and distributes the Classic and E-Classic outdoor wood furnaces, these outdoor wood-fired hydronic heaters can heat multiple buildings, hot tubs, pools, greenhouses, domestic water and more.

While burning a wood stove indoors can mean many problems, there is an alternative...a Central Boiler outdoor wood furnace. Also known as an outdoor wood boiler, outdoor wood gasification furnace, or outdoor hydronic heater, an outdoor wood furnace eliminates the problems associated with indoor burning and allows you to get even more benefits from wood heat. Central Boiler outdoor wood furnaces can actually improve the indoor environment in your home or business, while eliminating the time-consuming chore of tending a traditional wood stove.