CleanFire 900 Outdoor Wood Furnace

The CleanFire 900 titanium-enhanced stainless steel firebox ensures zero corrosion inside the firebox from high-moisture wood, creosote or condensation.  It also features two rows of stainless steel combustion air tubes. This product was designed with you in mind and includes additional features such as: air delivery system, vertical Easy View heat exchanger, air charge tube, and the FireStar Combustion Controller.

WoodMaster outdoor wood furnaces are compatible with most existing and new heat systems, including forced air, hydronic heat, radiant baseboard, existing water-to-water and in-floor. They can also be hooked up to your domestic hot water.

The CleanFire 900 is EPA Step 2 Certified.

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Overall Efficiency (LHV) – 92.1%*
Overall Efficiency (HHV) – 85.6%*
Manufacturers Rated Heat Output Capacity** – 400,000 Btu/hr
Heat Output (12 hr) – 212,957 Btu/hr


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*Efficiencies are determined under the same test conditions using higher heating value, lower heating value and overall efficiency. **Based on EPA qualifying test.


Furnace Specifications

  • Firebox Volume: 32 cubic ft
  • Firebox Dimensions: 42.75″L x 43.5″H x 31.5″W
  • Door: 22.75″W x 28.75″H
  • Ash Cleanout Door: 20″W x 11″H
  • Water Capacity: 420 gal.
  • Weight: 2,714 lbs
  • One set of 1-1/4″ Supply and Return Ports
  • Two sets of 3/4″ Supply and Return Ports
  • Bypass Door and Alarm


Copper Bronze
Copper | Bronze

Ecl Charcoal
Charcoal | Bronze

Ecl Green
Green | Bronze

Ecl Taupe
Taupe | Bronze



Easy, Convenient Operation

The FireStar combustion controller constantly monitors how the wood is burning and automatically adds air where and when it’s needed for the cleanest, most efficient combustion.

  • 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 – enable this feature if you want to be notified when it’s time to add wood

The FireStar Controller with onboard Wi-Fi keeps you informed of your furnace’s performance and operation. View operational information and receive text alerts on your smartphone or computer. Watch a live demo at MyFireStar.com/demo.

Firestar Demo Button

Top Performance

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.

Easy Access

The patented vertical Easy View Heat Exchanger with hinged door provides full access without the use of tools.


With the titanium-enhanced stainless steel firebox, there is zero corrosion and a lifetime of use, no matter what kind of firewood you burn.


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