EPA Qualified - Phase 2 - Wood

The Pristine Series furnaces are manufactured with the most advanced technology that achieves improved combustion and greater efficiencies then traditional furnaces.

Our Pristine Series furnaces are EPA Phase 2 Qualified.


  • Improved Combustion and Thermal Efficiency
  • Fewer Emissions
  • Less Wood Consumption = More Savings $$
  • Clean Burning
  • Energy Efficient
  • Easy Maintenance
  • Reliable Design
  • Extended Burn Times
  • Refires automatically
  • Smoke Free Combustion
  • Renewable Heat Source
  • Reduced Carbon Foot Print
  • EPA Phase 2 Qualified


  • High Grade 409 Stainless Steel
  • Class A Stainless Steel Chimney
  • Ceramic Secondary Combustion Area
  • Large Firebox Door
  • Large Access Cleaning Doors
  • High Quality EBM Fan

Pristine Series

409 Stainless Steel Firebox & Water Jacket - Developed and designed to withstand high temperatures up to 1400°F; 409 Stainless Steel will ensure the best corrosion resistance, maximum heat transfer, and strength needed for furnace firebox and water jacket conditions.

Digital Control Panel – Illuminated digital controls are simple, effective and easy to read.

Firebrick Refractory – Durable, custom design to withstand and store heat used in re-igniting wood and gasses quickly to achieve low thermal conductivity for greater energy efficiency.

Easy Maintenance – Insulated front and rear heat transfer doors provide you with easy access to heat transfer tubes to perform general cleaning.

Stainless Steel Chimney – Equipped with Class A insulated stainless steel chimney and can be easily extended when needed.

Insulated Rear Access Door – Large rear access will ensure easy installation of necessary pumps and includes two separate feed and supply lines for multiple building hookups.

Water Level Indicator – Easy to read water level indicator will keep you informed when additional water must be added to the system.

EPA Hang Tag – Our Pristine models are US EPA Phase 2 Hydronic Heater Program qualified.

Additional Features and Benefits

  1. Firebox Door: Insulated and manufactured extra large to accommodate easy loading of fuel and equipped with a double safety latch handle to keep you safe.
  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 2300 Deg F and 99% fuel combustion.
  5. Secondary Combustion Chamber Door: Wide insulated door provides necessary access to chamber to perform general cleaning.
  6. Heat Transfer Tubes: Strategically placed in the water reservoir to efficiently transfer maximum heat, generated in the secondary burn chamber to the water achieving high efficiency and low emissions.
  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.

EPA Phase 2 Qualified







Est Weight (lbs)












Wood Length



Chimney Size



Door Size

 20" x 20"

22" x 26"

Supply Size

 2 1-1/4"

2-1 1/4"

Return Size

 2 1-1/4"

2-1 1/4"

Water Capacity

 290 gal.

400 gal.

Fan Capacity

 150 cfm

150 cfm

Approx. Sq. Ft.

 4,000 - 5,000

7,000 - 8,000

Approx. BTU's



Insulation Walls

 R 30

R 30

Insulation Roof

 R 40

R 40

409 Stainless Steel




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.

What is Gasification?

Gasification happens when a 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.