Isokern Magnum+ 120" Wood Burning Fireplace - 82120

The Isokern Magnum+ 120" Wood Burning Fireplace is the largest model in Earthcore’s premium modular line, engineered to anchor grand interiors, hospitality venues, and expansive outdoor entertainment areas. Combining the authenticity of traditional masonry with prefabricated convenience, the Magnum+ 120" delivers monumental flame presentation, excellent radiant heat, and long-term durability using Earthcore’s volcanic pumice construction.

Features

• The largest UL-listed modular fireplace in the Isokern range
• 120" wide opening for dramatic, architectural presence
• Constructed from volcanic pumice for lightweight strength and superior insulation
• Modular, interlocking components for fast, precise assembly
• Certified to UL 127 and UL 103HT for safety and performance
• Supports wood, natural gas, or propane configurations
• Compatible with Jumbo Slimline gas burners and oversized log sets (special order)
• Designed for Eco-Steel and Eco-Steel+ Class-A chimney systems
• Optional GreenTech™ catalytic combustor for reduced emissions and improved draft
• Fire-Lite stand available for installations over combustible floors
• Backed by Earthcore’s limited lifetime warranty

Dimensions & Specifications

• Model: Magnum+ 120"
• Firebox Opening (Front × Height): 119" W × 44" H
• Overall Width: 131 ⅝"
• Overall Height: 94 ½"
• Overall Depth: 28"
• Flue Opening: 18" × 18"
• Dry Weight: ~3,800 lbs
• Minimum Chimney Height: 18 ft (straight) or 21 ft (offset)
• Clearances to Combustibles:
  • 1½" sides and rear
  • 24" above opening to combustible sheathing or mantel
  • 9" to side trim or sheathing
  • 48" opening to side wall
  • Hearth extension: 30" front, 12" each side
• Firebrick: 4" thick on sidewalls; 2½" on floor and back wall
• Foundation: Must be non-combustible and capable of supporting full system weight
• Installation Type: Indoor or outdoor (with proper venting and waterproofing)

What’s Included

• Modular pumice components (base, backwall, sidewalls, top plate, smoke dome)
• Mortar and adhesive kit
• 18" × 18" flue starter
• Installation and assembly manual
• Optional Fire-Lite stand, catalytic combustor, and gas conversion accessories

Firebrick Patterns & Usage

Available in two premium designs:

Running Bond Pattern
360 full or split firebricks
720 soapstone equivalents

Herringbone Pattern
400 full or split firebricks
800 soapstone equivalents

Installation Notes:
Use 4" thick firebrick for sidewalls.
Use full (2½" thick) firebrick for floor and back wall.
Always install using Isoset Firebrick Mortar (ISO-SET-BRICK).

Gas Burner & Log Set Options

If you plan to convert your Magnum+ fireplace to gas, please review the compatible options below carefully.

The Magnum+ fireplaces (84"–120") are built for dramatic, full-width flame displays and therefore require Jumbo Slimline Burners with matching Jumbo Slimline Log Sets. These components are special order items, crafted to fit your specific firebox size for optimal flame performance and heat distribution.

• Magnum+ 84" & 96" – Compatible with Jumbo Slimline Stainless Steel or See-Thru Burners (Special Order).
• Magnum+ 108" & 120" – Require a Custom Jumbo Slimline Gas Burner System, individually engineered and quoted by Earthcore.

Each system works with MVKEIKN (Natural Gas) or MVKEIKLP (Propane) electronic valve control assemblies and pairs beautifully with Jumbo Slimline Arizona Weathered Oak Log Sets.

Smaller vented burners may be used for demonstration or limited heating, but they will not fill the entire firebox and are not recommended for long-term installation.

Please allow additional lead time for all Jumbo Slimline and custom Magnum+ gas components, as these are built-to-order specialty systems.

Venting System

The Magnum+ 120" fireplace requires a Class-A venting system for safe, efficient operation:

• Eco-Steel Chimney System: Lightweight stainless venting ideal for framed or limited-clearance installations.
• Eco-Steel+ Chimney System: Premium insulated Class-A venting for multi-story, offset, or long-run chimney applications.

Installation Notes:
Minimum chimney height: 18 ft (straight) or 21 ft (offset). Termination cap or decorative chimney pot required for outdoor applications. Traditional masonry chimneys are not compatible with Magnum+ fireplaces.

Optional Accessories

• Magnum+ Fire-Lite Stand (for combustible floor installations)
• GreenTech™ Catalytic Combustor Kit (M-CCBSF)
• Isoflames electronic ignition valve kit (E-VKN / E-VKP)
• Assorted decorative log sets (Weathered Oak, Charred Oak, Driftwood, Birch, Aspen, Juniper)

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