As many current owners already know, an outdoor wood furnace from Central Boiler is one of the few things that can actually pay for itself. Now that payback just got faster thanks to the Classic Edge.

The Classic Edge is the new, clean-burning, EPA-certified outdoor wood furnace only available from Central Boiler.

Join Central Boiler's Mark Miller as he explains (in his own special kind of way) the features and benefits of this revolutionary new outdoor furnace.


Learn More About the Classic Edge


While a Central Boiler outdoor wood furnace itself is one of the most technologically advanced ways available to heat with wood, how it delivers heat is a pretty simple and neat idea.

Central Boiler outdoor furnaces burn wood to heat water that is circulated through insulated pipes. Water can transfer its heat by direct circulation or by moving through one or more heat exchangers, or both. Of course, your situation is unique, so it’s important you talk to a Central Boiler dealer to make sure you select the right model for your application.

More "How it Works"


Stay connected to the furnace that saves you money on your heating bills from almost anywhere in the world.

Adding the optional FireStar XP wi-fi module keeps you in constant contact with your Central Boiler furnace if you're just across town having dinner or half way around the world enjoying your vacation on the beach.

Learn More About FireStar XP

A revolutionary new patent-pending design. The perfect combination of value and performance.

Central Boiler's newest EPA-certified model line, the Classic Edge is the perfect combination of value and performance with the same quality, construction and performance as other Central Boiler models. The Classic Edge is easy to operate and maintain. Models to match many installation scenarios are available.

  • Value AND performance - the revolutionary new patent-pending design of the Classic Edge combines value and performance without sacrificing Central Boiler quality, reliability and performance.
  • Easy to operate - FireStar II controller takes the guesswork out of operating.
  • Easy to maintain - firebox design and heat exchanger system make for easy maintenance and cleaning.
  • U.S. EPA Certified - Classic Edge 350, 550 and 750 are U.S. EPA Certified.

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View real-time information, historical charts and more with the optional FireStar XP Wi-Fi Module.

The most advanced, efficient outdoor wood furnace on the market today.

The E-Classic is certified and leads the industry in performance and features. With thousands in operation across the country, the E-Classic has been saving families countless dollars on their heating bills for years. If you're looking for an outdoor furnace packed with features, be sure to take a close look at what an E-Classic has to offer.

  • Push-button ignition - the ultimate convenience in an outdoor furnace is the optional gas-fired wood ignition which can also automatically relight the fire if needed.
  • Burn less wood - the E-Classic's hallmark sprayed-on urethane foam prevents heat from escaping so more heat energy can get to your home.
  • Redirect exhaust before opening firebox door - conveniently located and easy to use, the bypass ensures exhaust will be redirected out the chimney when you need to open the firebox door. 
  • LED lights - long-lasting, energy efficient LED night lights illuminate the sides of the furnace and the inside of the firebox when the firebox door is open.
  • U.S. EPA Certified - E-Classic 1450 and 3250 are U.S. EPA Certified.


View real-time information, historical charts and more with the optional FireStar XP Wi-Fi Module.


An optional Gas-fired Wood Ignition kit provides easy starting and automatic relighting if needed.

There is no safer, more convenient way to heat with wood.

As Central Boiler's most enduring model line, the Classic long ago set the standard for quality and performance, and revolutionized the outdoor wood furnace. With the implementation of the EPA's New Source Performance Standards, in the U.S., Classic models are for non-residential applications only.

  • More heat from the wood - the RippleTop design maximizes the surface area of the firebox and the HeatLock Baffle traps the heat in the heat collection area.
  • Easy to load - the large, insulated cast iron door is ergonomically designed for easy opening and closing and insulated to lock in the heat.
  • Easy to operate - the automatic draft control opens and closes as needed to control the water temperature in the system.
  • Durable and long-lasting - steel siding and powder-coating paint provide unequaled fit and finish and withstand the elements of time.
  • Dual Fuel Ready option - All Classic models are available as a Dual Fuel Ready model (standard on the CL 7260 and Pallet Burner) that allows the furnace to be fitted with an optional fuel oil, natural gas, or propane burner.

Ultimate comfort and convenience for your entire home and more.

Central Boiler's new Forge Outdoor Coal Furnace can be the perfect choice for those that live where coal is abundant and available. Built with the same quality and attention to detail as Central Boiler's outdoor wood furnaces, the Forge is a better way to heat with coal.

  • Heat Multiple Buildings - Heating multiple buildings is easy. The Forge 1500 has one set of 1-1/4” supply and return ports (that can be configured for two pumps). The Forge 3500 has one set of 1-1/4” supply and return ports and one set of 3/4” supply and return ports. The Forge 6000 has one set of 1-1/4” supply and return ports and two sets of 3/4” supply and return ports.
  • Convenient Operation - Loading coal is easy with the large firebox door. Ergonomically designed, the firebox door is insulated and easy to open and close. Heavy-duty shaker grate, conveniently operated by handle on side of the furnace, allows ash to fall below into the ash collection area. Ash removal is easy.
  • Burn Less Coal - A hallmark of Central Boiler furnaces for over 30 years, spray-on urethane is the ultimate airtight, waterproof insulation that locks the heat in to reduce coal usage, even at temperatures of -35˚F or colder. It provides 2-3 times the effective R-value of conventional fiberglass batt insulation.
  • Ultimate Control - The FireStar™ II electronic controller monitors all functions of the furnace and can store and share operational data. The controller’s technology optimizes the combustion process by automatically adjusting the fan-forced air for a cleaner and more efficient burn. Compatible with the FireStar XP wi-fi module.