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Green Mountain 90 Wood Insert by Hearthstone

Starting at $7,627.00$8,225.00

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Our large flush insert combines stylish cast iron with our signature soapstone lining.


Enameled cast iron

The flush cast iron front of the GMI 90 is available in matte black or our brown enamel finish.

Soapstone firebox

Burn up to 20 inch logs in the soapstone lined firebox. Soapstone retains the maximum heat from you fire and radiates steady warmth as your insert burns.

Simple operation

Our non-catalytic wood insert is easy to use. A single lever air control lets you burn hot and fast or low and slow to keep warm through the night.


Blower: Included

BTU: Up to 80,000

Efficiency: 64% HHV

EPA Certified: 1.22

Finish: Brown Enamel, Matte Black

Firebox Capacity: 2.5 cu ft

Flue Exit Diameter: 6

Flue Exit Location: Top

HeatLife: 8

Heats up to: 2,200

Maximum Log Length: 20″

Model: 8460

Stove Type: Wood Fireplace Insert

Weight: 475


Steel Surround: 94-5960010

Surround Extension: 94-5960110

Outside Air Adapter Kit: 94-53500

Fire Screen Insert: 94-69110

Linear Hook-Up Collar: 94-67500

Mantel Shield: 94-79700

Offset Liner Adapter: 5700-007


To combustible mantel from bottom of insert: 40-3/4”

To side trim from side of insert body: 9-1/2”

To side wall from side of insert body: 19”

Our Materials

Each HearthStone is handcrafted using a combination of precision-made components in cast iron, soapstone, steel, ceramic, and various other materials. Our commitment to quality and attention to detail ensures that your product will serve you faithfully for years to come.

Available Finish


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