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.

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


E-Classic 2400 Ignition Ready
Door 22.5"x28.5"
Firebox 36"x43.5"x26"
Heat Transfer Area N/A
Weight 2925 lbs
Water Capacity 340 gallons


E-Classic 3200 Ignition Ready
Door 28.5"x22.5"
Firebox 40"x48"x30"
Heat Transfer Area N/A
Weight 3060 lbs
Water Capacity 410 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.

Pallet Burner
(Business solution for light commercial or industrial use.)
Door 54"x50"
Firebox 72"x66"x54"
Heat Transfer Area N/A
Weight 4950 lbs
Water Capacity 556 gallons

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







1. Charge Tube - Super-heated air is injected and mixed with the hot gases from the primary firebox and starts the secondary combustion process. No catalytic device needed.

2. Large Reaction Chamber™ - Final combustion occurs in the Reaction Chamber where extremely high temperatures aid in complete combustion. The Reaction Chamber features a large, hinged door for easy ash removal.

3. Power Ignition - The furnace can be fitted with an optional propane burner which allows for push-button automatic gas-fired wood ignition. This provides easy starting and automatic relighting of the fire if needed. Natural Gas conversion kit available.

4. EPA Hangtag - The E-Classic 3200, 2400 and 1400 are U.S. EPA Hydronic Heater Program qualified and have met the Phase 2 emissions level.

5. Urethane Foam Insulation - Insulation is sprayed on and forms a 100% airtight, waterproof seal around the water jacket.

6. Triple Insulated Firebox Door - Ergonomically designed door is lockable and features a large opening for easy loading. Door is triple insulated for maximum efficiency. Panels are powder coated for high durability. The heavy-duty door handle is durable and easy to use.

7. Cam Loc® Door Closure - The specially designed curved ends of the door closure fit precisely around the adjustable bearings, for a tight seal each time the door is closed.

8. Rear Access Panel - Designed for convenient installation and easy access to pumps and power disconnect. Up to three pumps can be installed.

9. FireStar™ Electronic Controller - Provides user with easy operation of the furnace with just the touch of a button. The controller automatically adjusts the primary and secondary air which optimizes the gasification process allowing the furnace to be more efficient and cleaner burning.

10. High Capacity Water Jacket - Provides a balance between firebox volume and water capacity for optimum performance and safety.

11. Insulated Chimney - Two 4-foot, insulated chimney sections are supplied. Additional sections are available for extending the chimney when needed.

12. Xtract™ Heat Transfer System - Transfers the heat from the exhaust to the water during the final combustion phase and before the exhaust exits the chimney.

13. All-Weather Steel Siding - All siding is overlapped for tighter weather seal. All panels and corners are powder coated for high durability.

14. Bypass Door - For redirecting exhaust when refueling.

15. Photo Electronic Controlled LED Lights - Long-lasting energy-efficient LED night lights save money and enhance safety. They illuminate the inside of the firebox and the front and sides of the outdoor furnace and can be conveniently set to automatically turn on at night.