Mason-Lite 108" Linear Gas Fireplace (No Trough)- Dual 12" B-Vent

Estimated Arrival: Between and . (To All Contiguous States)

✔ Same-Day Order Processing
✔ Free Returns
✔ No Restocking Fees
✔ Financing Options Available

Text or call 888-992-1556, start live chat, or email with any questions. Our team is available to serve you 8:00 AM - 11:59 PM ET, 7 days a week.


Mason-Lite Fireplaces are designed as factory-built blocks to be assembled on-site. These fireplaces may be installed on either combustible or non-combustible floors. In order to function, the system requires a 12” B-vent chimney.

Looking for a contemporary style for your new fireplace? Look no further than Mason-Lite. Mason-Lite provides safe, yet esthetically beautiful, linear fireplaces for your indoor and outdoor living space.

At Mason-Lite we have been making custom masonry fireplaces for years with great success. Mason-Lite is proud to present our semi-custom linear fireplace line that spans from 4 feet up to 10 feet wide. We have tested 7 new models to the ANSI Z 21.50 standard for Vented Decorative Gas Appliances. This gives you even more peace of mind when using our Custom Linear units. Please see the list below of the units that we tested. All of these units come with a shortened 22.5″ finished opening height that gives you that linear look that is so popular today.

Why Choose Mason-Lite:


  • 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



Model LMFP108-NT
Dimension A 121"
Dimension B 111"
Dimension C 108"
Dimension D 105"
Framing Dimension (Non-combustible floor system) 126" (W) x 40.5" (H1) x 54.25" (H2)
Floor Area 122" x  28" (23.7 ft²)
H-Burner BTU/HR 180,000
Gas Log Burner BTU/HR 155,000
Mortar, Rebar, and Ready Mix Concrete 330 lbs.
Weight 2987 lbs.
Flue (2) 12” Ø
Style Contemporary
Installation Type Flush Installation / Corner / Internal Wall / Full Projection
Certification ANSI Z21.50 compliant
Warranty Limited lifetime warranty

*NOTE: Firebricks Panel is not included in any custom*



Attention: You may need a residential building permit to install a Mason-Lite Fireplace. Consult local jurisdictions before you get started!