Class-Act Outdoor Furnace
1263 72nd St SE
Montrose,  MN  55363

763-972-6255  

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Central Boiler® Outdoor Wood Furnaces

Something to consider:
A square firebox is 28% larger than a round firebarrel of the same dimension for a larger wood capacity and larger heat transfer area for a longer burn time. Ripple top, Heat Lock Baffel, and Rear Exit Chimney for unequealed efficiency.


Call us for all your furnace sizing needs.

Please contact us if you are interested in purchasing any of our products or accessories, or if you would like to know more about how our products work.

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



Classic CL 4030
Door 20"x20"
Firebox 40"x30"x26"
Heat Transfer Area 52
Weight 1350 lbs
Water Capacity 140 gallons


Classic CL 5036
Door 23"x23"
Firebox 50"x36"x30"
Heat Transfer Area 74
Weight 1670 lbs
Water Capacity 196 gallons

*Replaces up to 250 gallons of fuel oil per month

Classic CL 6048
Door 23"x31"
Firebox 60"x48"x36"
Heat Transfer Area 119
Weight 2450 lbs
Water Capacity 393 gallons

*Replaces up to 500 gallons of fuel oil per month.

Classic CL 7260
(For more than residential heating.)
Door 30"x40"
Firebox 72"x60"x40"
Heat Transfer Area 170
Weight 3910 lbs
Water Capacity 764 gallons

*Replaces up to 1,500 gallons of fuel oil per month.

Pallet Burner
(Business solution for light commercial or industrial use.)
Door 54"x50"
Firebox 72"x66"x54"
Heat Transfer Area N/A
Weight 4880 lbs
Water Capacity 556 gallons

*Heating capacity similar to the CL 7260.
*One year warrranty.

E-Classic 2300
Door 23"x29"
Firebox 36"x 30"x41"
Heat Transfer Area N/A
Weight 2900 lbs
Water Capacity 450 gallons

* Similar output to the CL 6048.
* Replaces up to 800 gallons of fuel oil per month.

E-Classic 2300 Dual Fuel Model
Door 23"x29"
Firebox 36"x30"x41"
Heat Transfer Area N/A
Weight 3000 lbs
Water Capacity 450 gallons

Gas Backup Burner - 175,000 Btu
Gas-fired Wood Ignition Burner - 60,000 Btu

* Similar output to the CL 6048.
* Replaces up to 800 gallons of fuel oil per month.

E-Classic 1400
Door 18.5"x18.5"
Firebox 32"x24"x32.5"
Heat Transfer Area N/A
Weight 2085 lbs
Water Capacity 195 gallons


Maxim M250 Wood Pellet / Corn Furnace
(250,000 Max Btu**)
Door 15.5"x13.5"
Firebox N/A
Heat Transfer Area N/A
Weight 1310 lbs
Water Capacity 90 gallons

* Visit maximheat.com for more information.







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. (1/4” thick, formed ash pan on stainless steel models.)

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.

For more information please visit centralboiler.com