Hearthstone Green Mountain 40 Wood Stove

Green Mountain 40

Model 8640



TruHybrid™ Combustion System:
Clean burning, uber-efficient, burn times up to 16 hours**.

Single Lever Air Control:
Easy operation, consistent performance

Easy Catalyst Control Handle:
Open side lever for smokeless startups, close for long, efficient fires

Durable Construction:
Full cast iron construction with 1¼” soapstone lining offers lasting heat and a lifetime of trouble free service.

Large Front Door Glass:
The giant window warms your home with heat and the flickering light of the fire.


Matte black finish swatchMatte Black



BTU: Up to 40,000 Efficiency: 79% EPA Certified: 1.07 g/hr Finish: Matte Black Firebox Capacity: 1.32 cu ft Flue Exit Diameter: 6 Flue Exit Location: Top HeatLife: 20 Hours of heat Heats up to: 1,400 sq ft Maximum Log Length: 16″ Stove Type: Green Mountain Wood Stove Weight: 464 lbs


Convection Blower: 96-57400 Outside Air Adapter: 96-53400


  • Side: 14″
  • Rear: 15 1⁄2″
  • Corner: 7″ Single-wall connector pipe, no rear heat shield
  • Side: 14″
  • Rear: 13 1⁄2″
  • Corner: 7″ Single-wall connector pipe with included rear heat shield
  • Side: 14″
  • Rear: 9 3⁄4″
  • Corner: 7″ Double-wall connector pipe with blower kit heat shield


Green Mountain 40 Owners Manual Catalog