
Hearthstone Green Mountain 20 Wood Stove
Engineered for cozy corners, it delivers efficient, reliable heating for cabins, tiny homes, or intimate living rooms.
TruHybrid™ System
Our TruHybrid™ system burns so cleanly and efficiently, your chimney smoke is barely visible.
Soapstone Comfort
Enjoy long-lasting comfortable heat thanks to the soapstone-lined firebox. Soapstone absorbs the heat of the fire for hours of cozy comfort.
Clean-lined Cast Iron
More than just a black box, the GM20 is designed in cast iron with a clean, modern style that compliments both traditional and contemporary homes.
Specifications
- BTU: Up to 23,000
- Efficiency: 78.5%
- EPA Certified: 1.14 g/hr
- Finish: Matte Black
- Firebox Capacity: 1.0 cubic feet
- Flue Exit Diameter: 6″
- Flue Exit Location: Top
- HeatLife: 9.5
- Heats up to: 575 sq. ft.
- Maximum Log Length: 18″ (16″ recommended)
- Model: 8620
- Stove Type: Cast Iron Wood Stove
- Weight: 285
Available Accessories
- Rear Heat Shield: 96-68200
- Side Heat Shield: 96-68205
- Outside Air Stater Kit, 3″: 96-53400
- Outside Air Increaser, 3″ to 4″: 90-53308
Clearances
- Single-wall connector pipe, no heat shields
- Side: 13.75″
- Rear: 10″ (15.25″ CAN)
- Corner: 9.5″ (12.5″ CAN)
- Double-wall connector pipe, no heat shields
- Side: 13.75″
- Rear: 9″
- Corner: 9.5″
- Double-wall connector pipe with side & rear heat shields
- Side: 9″
- Rear: 3.5″
- Corner: 4″