Features
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.
Efficiency
69%
HHV
HeatLife
10
Hours of heat
EPA Certified
1.54
g/hr
Specifications
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
Accessories
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
Clearances
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.
Soapstone
Soapstone is a natural material that absorbs the high heat of a fire, then radiates a gentle heat into the room. Soapstone warms the objects in your home, not just the air, resulting in a comfortable, livable heat.
Learn more about heating with soapstone
Cast Iron
Using selected raw and recycled material, our iron parts are produced in our foundry in Spain. Our modern casting facility guarantees durable, reliable, high-quality cast iron parts.
Precision Steel
High-quality steel components are formed using the most modern processes available to achieve the highest level of fit and finish.
Configuration
& Options
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
Accessories
Steel Surround
94-5950110
The steel surround panel attaches to the back of the cast iron faceplate.
Steel Surround, Lower Panel
94-5950510
The Surround Lower Panel adds a lower panel to complete a 4 sided surround. Use for elevated hearth installations.
Surround Extension
94-5950010
The surround extension is installed between the cast iron faceplate and the steel surround, reducing the hearth depth required to install the fireplace insert.
Outside Air Adapter
94-53500
Connect an outside air source directly to your fireplace insert. Recommended for air tight homes. 5 inch flexible pipe not included.
Mantel Shield
94-79700
The mantel shield attaches to bottom of a combustible mantel to reduce clearances per NFPA 211 standards. Attach to the mantel with screws and ceramic spacers. 48 inches wide. It can be cut to fit specific installations.
Fire Screen
94-69500
The Fire Screen allows the user to burn the fireplace with the door open to enjoy the direct fire.
Liner Hook-Up Starter Collar
94-67500
The Liner Hook-Up Starter Collar connects to your chimney liner before you install the insert in the fireplace. It can then be easily and safely secured to the insert after the insert is placed in the fireplace, making the whole installation process easier.
Offset Liner Adapter
5700-007
The offset adapter moves the connection point between the insert and the chimney liner up to 6 inches back.
