Mason-Lite Outdoor 84 Inch B-vent Fireplace
This Mason-Lite outdoor 84 inch linear gas fireplace (no trough) – 12″ B-Vent combines high-end aesthetics with powerful functionality to transform any room into a warm and stylish space. With its sleek, modern appearance without the complexity of a traditional burner trough, this B-vent gas fireplace is designed and manufactured in the U.S.A. This best linear gas fireplace’s square sides and 90-degree rear angles create a contemporary style that easily integrates into any interior. Its design is enhanced by the option of a flush hearth to enable an aesthetically pleasing streamlined appearance.
This ANSI Z21.50 compliant fireplace delivers significant heating capabilities with BTU outputs ranging from 85,000 to 200,000. With a powerful 140,000 BTU/hr, the H-Burner, while the Gas Log Burner provides a robust 125,000 BTU/hr, provides efficient heat distribution for large rooms. It is built with modular precast techniques to reduce installation time and labor, weighing 2490 lbs and using 290 lbs of mortar, rebar, and ready-mixed concrete. Additionally, it is compliant with ANSI Z21.50 standards and accepted for Class A chimneys.
The Mason-lite 84″ linear gas fireplace supports various installation types, including flush placement and corner placement. It can accommodate both single and dual 12″ B-vent chimneys, depending on architectural requirements. The Golden Blount Alpine Burner and the Warming Trends Crossfire Burner are two high-quality burners available for additional customization. This outdoor 84 inch b-vent fireplace features a certified, safety-listed glass door. With its limited lifetime warranty, Mason-Lite demonstrates its commitment to quality and customer satisfaction to make this outdoor linear gas fireplace a wise investment. Its sleek design, combined with powerful heating efficiency, ensures that your home remains both stylish and comfortable.
Features:
- Available in – LMFP 48”-NT, 60”-NT, 72”-NT, 84”-NT, 96”-NT, 108”-NT and 120”-NT models
- Class A chimney accepted
- ANSI Z21.50 compliant
- Glassdoor tested & listed
- Square sides – 90º angle in rear corners
- Choice of flush hearth or burner trough
- Units available with & without burner trough
- BTUs starting at 85,000 to 200,000, depending on model
- Standard sizes are designed to use single or dual 12” B-vent chimney
- Available with Golden Blount Alpine Burner & Warming Trends Crossfire Burner
- Custom widths also available including, but not limited to, corners & see-throughs (meet NFPA211 requirements)
- Modular Pre-cast fireplaces reduce labor and assembly time
- Made in the U.S.A
Specifications:
| Model | LMFP84-NT |
| Dimension A | 97″ |
| Dimension B | 87″ |
| Dimension C | 84″ |
| Dimension D | 81″ |
| Framing Dimension (Non-combustible floor system) | 102″ (W) x 40.5″ (H1) x 54.25″ (H2) |
| Floor Area | 98″ x 28″ (19 ft²) |
| H-Burner BTU/HR | 140,000 |
| Gas Log Burner BTU/HR | 125,000 |
| Mortar, Rebar, and Ready Mix Concrete | 290 lbs. |
| Weight | 2490 lbs. |
| Flue | 12” Ø |
| Required Items | 12″ B-vent Chimney |
| Style | Contemporary |
| Installation Type | Flush Installation / Corner / Internal Wall / Full Projection |
| Certification | ANSI Z21.50 compliant |
| Warranty | Limited lifetime warranty |
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About The Manufacture:

Masonry Fireplace Industries (MFI) is a Riverside, California based company that is the manufacturer of MASON-LITE Fireplace and Chimney Systems. MFI also offers MASON-LITE Linear units and provides custom drawings for all your fireplace needs.






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