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Green Mountain 70 Wood Insert by Hearthstone

Starting at $6,281.00$6,954.00

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The GMi70 has been designed to fit flush with your hearth. It has a clean yet traditional style that compliments many styles of home decor.


Flush cast iron design

The cast iron front of the GMi70 is designed to fit flush with your hearth for a clean and elegant look.

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 70,000

Efficiency: 69% HHV

EPA Certified: 1.54 g/hr

Finish: Brown Enamel, Matte Black

Firebox Capacity: 2.4 cu ft

Flue Exit Diameter: 6

Flue Exit Location: Top

HeatLife: 10 Hours of heat

Heats up to: 2,000 sq ft

Maximum Log Length: 20″

Model: 8450

Stove Type: Wood Fireplace Insert

Weight: 513


Steel Surround: 94-5950110

Surround Lower Panel: 94-5950519

Surround Extension: 94-5950010

Outside Air Adapter Kit: 94-53500

Fire Screen Insert: 94-59500

Linear Hook-Up Collar: 94-67500


To combustible mantel from bottom of insert: 50”

To side trim from side of insert body: 9”

To side wall from side of insert body: 16”

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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