RS 7400E - Gasification Wood Stove

Regular fire burns at temperatures of 395ºF to 535ºF releasing gases from the wood. These gasses are known as synthesis gas or syngas. Syngases are found to contain 50%-80% heat content from wood. Traditional furnaces allow these syngas to escape. Wood gasification captures these gasses producing highly efficient smoke free combustion and low emissions.

Benefits -

  • Flexible, reliable and clean
  • Reduces our dependance on foreign oil and natural gas.
  • Renewable resource
  • Environmental benefits with fewer emissions

 How the RS 7400E Works -

  • Firebox- Drum air tubes blow air into the firebox forcing the syngas down into the secondary burn chamber.
  • Secondary Burn Chamber - Ceramic fiber lined chamber collects heat from above fire and absorbs the syngas then burns them at temperatures as high as 2000ºF. 
  • Heat Transfer Tubes - Exhaust air escapes through the heat transfer tubes running throughout the water jacket, heating the water to desired temperature.
  • Chimney - Exhaust air escapes out the chimney which has cooled to temperatures of 300ºF by the time it exits the chimney.

Gasification Wood Stove Features

  1. Firebox Door: Extra large insulated door for easy loading of fuel.
  2. Primary Burn Chamber: Large sealed firebox chamber door allowing wood to burn only when air is introduced.
  3. Air Delivery Tubes: Designed to distribute preheated outside air evenly within the firebox allowing the most even possible burn.
  4. Secondary Burn Chamber: Exhaust gases from firebox are injected with air to achieve temperatures up to 2300ºF and 99% fuel combustion.
  5. Secondary Combustion Chamber Door: Wide insulated door for easy cleaning.
  6. Heat Transfer Tubes: Strategically placed in the water reservoir to efficiently transfer heat, generated in the secondary burn chamber, to the water.
  7. Heat Transfer Doors: Large Insulated doors for easy access to clean heat transfer tubes.
  8. Stainless Steel Flue: Conventional flue exhausts has temperatures of 800ºF - 1000ºF. The RS7400E has flue exhaust as low as 280ºF.

Gasification Wood
Stove Maintenance

With the newest clean burning technology available the RS7400E has simple maintenance steps that are done to ensure the unit is burning with the most efficiency as possible. Maintaining your RS7400E has never been easier.

Step One: Cleaning of the secondary burn chamber is recommended weekly. Simply use the rake (included) making a few sweeps through this area will prevent build up of fine ashes.


Step Two: Biweekly cleaning is recommended of both horizontal and vertical heat transfer tubes to prevent build up of fly ashes. Easy access to heat transfer tubes is easily achieved through the over sized large doors located in the front and back of the stove. Simply place the small brush included with our stove down each tube.

EPA Phase 2 Qualified

Greentech Manufacturing's Pristine Series has the highest required standards in mind.  Our EPA Phase 2 Qualified Stove is one of the cleanest burning units available.  Enjoy your stove with confidence, knowing it has a 20 Year Limited Warranty.

The RS7400E Has an approximate range of 300,000 BTU's and estimated heating capacity of 7,000-8,000 square feet.  The RS7400E is one of the largest EPA Phase II Stoves on the market today.



  • 409 Stainless Steel
  • EPA Phase 2 Qualified
  • 89% Heat Transfer Efficiency
  • Long Burn Time
  • Refires Automatically
  • Gasification Technology
  • Smoke Free Combustion
  • 90% Cleaner Then Conventional Units
  • Up To 300,000 BTU Heat Output
  • Ceramic Secondary Combustion Area
  • Secondary Burn Chamber Burns up to 2000 Deg. F.
  • Seamless Flue
  • Water Level Indicator
  • High Quality EBM Fan
  • Extra Large Loading Firebox Door
  • Extra Large Clean Out Door For Easy Cleaning
  • USA Manufactured

No need for splitting wood, the RS7400E operates best with large diameter full length logs up to 34 inches.  The RS7400E is equipped with an extra large firebox door made for quick and easy loading.





Est Weight (lbs)







86 1/2"

Wood Length


Chimney Size


Door Size


Supply Size

2-1 1/4"

Return Size

2-1 1/4"

Water Capacity

400 gal.

Fan Capacity

150 cfm

Approx. Sq. Ft.

7,000 - 8,000

Approx. BTU's


Insulation Walls

R 30

Insulation Roof

R 40

409 Stainless Steel