Hearthstone Green Mountain Insert 90 (GMi90)

The Hearthstone Green Mountain Insert 90 is a large, flush-mount fireplace insert that combines stylish enameled cast iron with Hearthstone’s signature soapstone firebox lining. Designed to maximize both efficiency and aesthetics, the GMi90 allows you to burn logs up to 20 inches while enjoying steady, radiant heat stored and released by the soapstone interior.

Its single-lever air control makes operation simple — whether you want a hot, fast fire or a steady overnight burn. With clean lines, traditional styling, and available matte black or brown enamel finishes, the GMi90 blends beautifully with many home décors.