Classic Edge HDX logo

Classic Edge Titanium HDX Outdoor Wood Furnace


Classic Edge HDX Models Deliver Best Efficiency, Highest Btu Rating


Higher efficiencies and Btu ratings deliver more heat using less wood. *At 92% overall efficiency (LHV), the Classic Edge 960 HDX provides the highest efficiency of EPA Certified stick-wood burning appliances compared to outdoor appliances with a maximum output greater than 300,000 Btu/hr. It also delivers the highest Btu rating of cord wood appliances, with a rating of 400,000 Btu/hr. Classic Edge HDX models are among the top for efficiency of all stick-cord wood heating appliances certified for sale for residential heating in the USA. *EPA cord wood Hydronic Heater list 7/28/2022.

Classic Edge HDX 760 and Happy Owners

Heat Your Entire Home, Domestic Water and More with Less Wood

Introducing the Classic Edge Titanium HDX outdoor wood furnace. Classic Edge HDX models are among the most efficient outdoor wood furnaces that are EPA Step 2 Certified. High efficiency means less wood is needed to heat your entire home, domestic hot water and more. The titanium-enhanced stainless steel firebox is impervious to corrosion and designed to last a lifetime. Thousands of families rely on their Central Boiler furnace to provide warmth, safety and comfort while eliminating their high heating bill and giving them a better quality of life.

In Our Customers' Words

"When we switched to Central Boiler we started saving $500/month on our heating bill." - Maria, Minnesota







FireStar Controller - Stay connected to your furnace from anywhere!
FireStar Controller - Stay connected to your furnace from anywhere!

Cruise Control for the Furnace


STAY CONNECTED! More than just a controller, the FireStar Combustion Controller features built-in wireless connectivity, giving you the ability to communicate with the furnace without additional equipment or cumbersome ethernet cables.

The FireStar® combustion "cruise" controller takes all the worry and guesswork out of wood heating. It constantly throttles the air to find the optimal burn, meaning you can “load it and forget it.” FireStar constantly monitors how the wood is burning and adds air where and when it’s needed for the cleanest, most efficient combustion. You can even see how it’s operating in real time on your smartphone or set up notifications so you’ll know when it’s time to add wood.

More features you’ll only find with FireStar:

  • Reserve Mode - reserves a portion of the previous wood load so you'll never have to relight a fire
  • Burning Time Monitor - helps to estimate how much wood is left
  • Clean Reload - Can eliminate smoke when you open the firebox door to add wood
  • Text Alerts - if you want, be notified when it’s time to add wood

Watch a live demo at


The titanium-enhanced stainless steel firebox ensures zero corrosion inside the firebox and can last a lifetime.


Use up to 60% less wood compared to other methods of wood heating and deliver more heat to your home. All Central Boiler furnaces are engineered to minimize heat loss, from the construction of the firebox door, panels and pump access area to the airtight, waterproof spray-on urethane foam insulation. The larger firebox allows for longer burn times, saving you even more time.

Classic Edge HDX models are EPA-certified clean-burning and are among the most efficient, best ways available to burn wood.


VIDEO - Enhanced Classic Edge Titanium HDX

Engineered to the Highest Standards...Ours

Innovative Design

The Classic Edge’s patented Air Charge Tube directs oxygen into the Fusion Combustor and keeps coals from falling into the Reaction Chamber. Oxygen mixes with the combustion gases and is focused down into the Afterburner. The Air Charge Tube also helps the furnace to relight faster.

Classic Edge HDX fireball in action



Super-heated gases enter the round chamber of the Afterburner and swirl in a turbulent vortex, creating a Fireball and allowing enough time for complete combustion to occur.

Clean and Efficient

Efficient combustion requires precise air. When the fire needs a lot of air (such as during startup), the FireStar Controller instructs the SmartDraft™ system to open the air regulating discs precisely to deliver the exact amount of air needed. The motors in the SmartDraft system are maintenance-free, use less power than other air control methods and never need adjustment or replacement due to wear.

Easy Access

An industry exclusive, the patented vertical Easy View® Heat Exchanger with hinged door provides full access without the use of tools. That makes for quick inspections and easy cleaning from outside the firebox while standing on the ground.

Better Heat Extraction

Turbulators in the heat exchanger cause turbulence of the exhaust gas flow through the heat exchanger. This forces the heated exhaust to better contact the heat exchanger and transfer more of its energy to the surrounding water jacket before exiting out the chimney.