HearthStone Green Mountain 40

The Hearthstone Green Mountain 40 is a stylish and modern wood stove that combines cutting-edge technology with traditional craftsmanship to provide an eco-friendly and efficient heating solution. The sleek design of this stove features a large viewing window that allows you to enjoy the beauty of the flames as they dance and flicker within the firebox. With a 2.6 cubic foot firebox, the Green Mountain 40 is capable of producing up to 40,000 BTUs of heat, making it suitable for heating large rooms and spaces.


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.


Model Green Mountain 40
BTU Up to 40,000
Efficiency 79% HHV
EPA Certified 1.07 g/hr
Finish Matte Black
Firebox Capacity 1.32 cu ft
Flue Exit Diameter 6
Flue Exit Location Top
HeatLife 16 Hours of heat
Heats up to 1,400 sq ft
Maximum Log Length 16″
Model 8640
Stove Type Green Mountain Wood Stove
Weight 350 lbs