Gas Fireboxes

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A gas firebox fits into your existing fireplace to get that custom look you've always wanted. Once installed, you're ready to build your dream fireplace from the ground up — choose your burner and log set, frame, louver and door to create a beautiful centerpiece for any room in your home. Our selection of vent free firebox options features products from top brands including White Mountain Hearth and Everwarm to guarantee the finest quality products on the market today. Shop our collection and enjoy free shipping to anywhere within the contiguous United States. We're certain you'll find a product you'll absolutely love.

Showing 1 - 12 of 14 Previous Page 1 2
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ProCom FBNSD32RTA 32000 BTU Complete Vent-Free Firebox with Logset
Price: $789.00
  • Louvered Face | Screen | Logset
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Monessen LCUF32-R 32" Vent-Free Lo-Rider Clean Face Firebox with Herringbone Liner
Price: $819.00
  • 29-7/8" W x 28-3/8"H Viewing Area | Existing Fireplace, In-Wall or Free-Standing Cabinet Installation
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Monessen GCUF36CF 36" Vent-Free Louvered Firebox with Cottage Clay Liner
Price: $639.00
  • 34" Viewing Area | Existing Fireplace, In-Wall or Free-Standing Cabinet Installation
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Monessen GCUF32CF 32" Vent-Free Louvered Firebox with Cottage Clay Liner
Price: $609.00
  • 29-7/8" Viewing Area | Existing Fireplace, In-Wall or Free-Standing Cabinet Installation
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Monessen GRUF32CF 32" Vent-Free Firebox with Cottage Clay Liner
Price: $609.00
  • 29-7/8" Viewing Area | Existing Fireplace, In-Wall or Free-Standing Cabinet Installation
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Monessen LCUF36C-R 36" Vent-Free Lo-Rider Clean Face Firebox with Herringbone Liner
Price: $869.00
  • 36" W x 31-1/4"H Viewing Area | Existing Fireplace, In-Wall or Free-Standing Cabinet Installation
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Monessen GRUF36CF Vent-Free Firebox with Cottage Clay Liner
Price: $639.00
  • 34" Viewing Area | Existing Fireplace, In-Wall or Free-Standing Cabinet Installation
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Monessen BUF42-R Vent-Free Exacta Firebox with Refractory Liner
Price: $639.00
  • 42" Viewing Area | Existing Fireplace, In-Wall or Free-Standing Cabinet Installation
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Monessen BUF36-R Vent-Free Exacta Firebox with Refractory Liner
Price: $529.00
  • 36" Viewing Area | Existing Fireplace, In-Wall or Free-Standing Cabinet Installation
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Everwarm EWVF36 36" Vent Free Firebox
Price: $449.00
  • ​Flush Face | Vent Free