Info About Pricing

‘Starting At’ price is MSRP for base model from manufacturer. Exact price you pay will be higher, as pricing does not include installation, venting, taxes, fees, or accessories. Pricing is subject to change without notice. Mistakenly posted prices and/or options on the website do not obligate us to those incorrect prices and/or options. Please contact us to inquire about an estimate.

Green Mountain 70 Insert by HearthStone

Wood Burning Fireplace Insert

HearthStone’s flush-face soapstone-lined fireplace insert. 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. The cast iron front of the GMi70 is designed to fit flush with your hearth for a clean and elegant look. 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. 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.

Flush cast iron design

Soapstone firebox

Simple operation

Up to 10 hours of heat

Burn logs up to 20″

Non-catalytic combustion technology

Heating Capacity

Up to 2,000 sq. ft.



Firebox Capacity

2.4 cu. ft.


1.54 g./hr.

EPA 2020 Certified



2 options available

Appliance Width 29″
Appliance Height 24″
Appliance Depth 16″
BTU’s Up to 70,000
Efficiency 69% HHV
Emissions 1.54 g./hr
Finish Matte Black, Brown Enamel
Fuel Type Wood
Maximum Log Length 20″
Firebox Capacity 2.4 cu. ft.
Flue Exit Diameter 6
Flue Exit Location Top
HeatLife 10 Hours of Heat
Heating Capacity 2,000 sq. ft.


Matte Black
Brown Enamel


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

See if this product works for you!