Hearthstone Green Mountain 40 TruHybrid Wood Matte Black

Warm your living area with a clean, efficient, long-lasting fire in a clean-traditional Green Mountain wood stove.

Ultra Clean Combustion Systems
All of our wood stoves exceed 2020 EPA standards so you can be sure they burn clean today and for many years to come.

Our TruHybrid™ stoves burn cleanly and efficiently before and after you engage the catalyst. The system combines primary and secondary combustion with tertiary combustion using a catalyst to take care of any unburned smoke particles and gases.

Clean Traditional Cast Iron
Our GM40 wood stove is styled with clean lines and offered in traditional black cast iron. Built for the wood stove purist.

TruHybrid Reliability
Our Green Mountain stoves exceed EPA clean burning standards. You can be sure they will burn clean today and for many years to come.

Soapstone Firebox Lining
The GM40 is lined with soapstone blocks. Soapstone absorbs the heat of the fire to give you long-lasting comfortable heat

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″

Model: 8640

Stove Type: Green Mountain Wood Stove

Weight: 350

Clearances

Side: 14″ 

Rear: 15 ½”

Corner: 14″

Single-wall connector pipe, no rear heat shield

Side: 14″ 

Rear: 13 ¾”

Corner: 7″

Single-wall connector pipe with included rear heat shield

Side: 14″ 

Rear: 9 ¾”

Corner: 7″

Double-wall connector pipe with blower kit heat shield