SKU:MGFPST43
Mason-Lite 43" See-Thru Gas B-Vent Firebox Kits
Mason-Lite 43" See-Thru Gas B-Vent Firebox Kits
Couldn't load pickup availability
- Free Shipping on Orders Over $400
- Same-Day Order Processing
Light up your living space with a Mason-Lite B-Vent fireplace
Complete with realistic logs, a remote control and safety features, it’s the perfect alternative to wood burning. Add our optional firebrick panels to complete your authentic masonry fireplace.
This GAS ONLY fireplace kit comes complete with premium quality realistic gas logs designed to replicate the natural beauty of wood with standard sizes of 39”, 44”, 49” and 43” see-through. Also included is High/low flame remote. These clean and environmentally friendly fireplaces require zero clearance to combustibles with a smaller flue for reduced framing. And to keep you and your family safe, there is a shutoff feature for fail-safe operation.
Virginiana Lucent Logsets are included with units MGFP39, MGFP44 and MGFP49 and must be used with the system. Standard Virginiana Log Set included with MGFPST43 and must be used with the system.
Why Choose Mason-Lite:

What's Included
- 43" See-Thru Gas B-Vent Firebox Kits
- Standard Virginiana Log Set
- Remote control
Features
![]() |
Clean and environmentally friendly |
![]() |
Lightweight construction |
![]() |
Limited Lifetime warranty |
![]() |
USA and Canada approved |
The benefits are indisputable
- Clean and Environmentally Friendly: Gas-burning fireplaces have lower outputs of carbon monoxide, pollutants, and particulate matter compared to wood-burners.
- Convenient, No-Mess Operation: Free from sparks and long-burning embers, no chimney cleaning, no messy ashes or wood chips, no wood storage space needed.
- 10" B-Vent Appliance with 24" Peterson Gas Logs
- Smaller Flue (10″ instead of 14″, 12″ instead of 16″ for See Thru) for reduced framing requirements. Architects love it.
- Compliant with ANSI-Z 21.50 Vented Decorative Gas Appliances
- Handheld remote control for turning the gas on or off
- Electronic ignition with battery backup
- Safety shutoff feature for fail-safe operation
- Utilized industry-standard 10″ B-Vent chimney (12″ B-Vent for MGFPST43)
- Optional firebrick colors and patterns for an authentic fireplace
Specifications
Model | MGFPST43 |
Included Burner Width | 30" |
Included Burner BTUs Natural Gas | 80,000 |
Included Burner BTUs Propane | 80,000 |
Finished Opening Dimension | 40" (W) x 30.5" (H) x 28" (D) |
Total Unit Height | 62.25" |
Foot Print | 53" x 28" |
Weight with Burner | 1726 lbs. |
Flue Diameter B-Vent | 12" ID |
Clearance to combustibles | 0" |
Installation Type | Flush Installation / Corner / Internal Wall / Full Projection |
Certification | ANSI-Z 21.50 compliant |
Warranty | Limited lifetime warranty |
Dimensions
Warranty
Lifetime Limited Warranty
MASON-LITE FIREPLACE
Masonry Fireplaces Industries, Inc. (MFI) warrants all Mason-Lite Fireplaces to be free from defects in materials that adversely affect fireplace performance for the lifetime of the product from the date of purchase, subject to the terms and conditions of this limited warranty.
MFI does not warrant accessory chimney, outside air ducts and devices not manufactured by MFI.
This warranty covers only products manufactured by MFI, specifically the modular concrete firebox, and NO WARRANTY, EXPRESS OR IMPLIED, EXTENDS TO ANY OF THE HARDWARE, FOUNDATION, VENTING, DUCTS, OR ACCESSORIES. THIS WARRANTY DOES NOT COVER DRAFTING, SMOKING, OR SOOTING OF THE FIREPLACE SYSTEM. Factors beyond the manufacturer’s control affect drafting, smoking, and sooting and MFI cannot guarantee these aspects of performance.
Coverage under this warranty is subject to the following conditions and exclusions:
- This warranty is null and void when the fireplaces are not installed pursuant to the installation instructions provided by MFI or local building codes have not been followed completely.
- Glass is warranted against thermal breakage only and only on models that are manufactured by MFI with a glass front. On Direct Vent models the safety glass or safety screen must be kept in front of this glass when fireplace is in use. Safety screen must be used on all models when in use.
- This warranty does not apply to any component or part that shows evidence of misuse, abuse, improper installation, accident or lack of regular maintenance. MFI is not responsible for misuse or mishandling of component parts.
- This warranty does not apply to any damage sustained to the appliance while in transit.
- Neither MFI, nor any affiliate thereof, is responsible for any labor costs or indirect costs incurred for the replacement of defective components. Any covered component that, in our judgment, is defective shall be repaired, replaced or refunded at MFI’s option.
- Nothing in this warranty makes MFI, or any affiliate thereof, liable in any respect for any injury or damage to the building or structure in which the fireplace has been installed or to the persons or property therein arising out of the use, misuse, or installation of properly manufactured MFI products.
- The fireplace must be used in accordance with operating instructions. The grate or andirons must be installed when using the fireplace.
NEITHER MFI, NOR ANY AFFILIATE THEREOF, SHALL BE HELD LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OR EXPENSES ARISING OUT OF THE USE OF THE FIREPLACE. ALL SUCH DAMAGES AND EXPENSES ARE HEREBY EXCLUDED. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.
If a component is found to be defective under the terms of this warranty, the party this warranty is extended to shall notify MFI in writing, by registered mail, within thirty (30) days following the discovery of the defect within the lifetime warranty period. The letter shall include proof of purchase and state the (1) date of purchase, model number and serial number ; (2) place of purchase; (3) address of installation; (4) name, address and phone number of the homeowner; and (5) a brief description of the defect.
This warranty applies only to those fireplaces installed in the continental United States, Alaska and Canada. If any part of this warranty is found to be unenforceable, the remaining parts shall remain in force and effect.
THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES, TERMS OR CONDITIONS, EXPRESS OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW. MFI HEREBY DISCLAIMS ALL GUARANTEES AND WARRANTIES, EXPRESS OR IMPLIED, BEYOND THE WARRANTIES SET FORTH HEREIN, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.
Revision date: 1/29/2015
Documents & Files
Videos
Training Video
Mason-Lite Brick Panel Drystack
True Firebrick Panels Installation
Steel Throat Damper Installation
Frequently Asked Questions
Does the Mason-Lite B-Vent model come with logs?Yes. These units come complete with realistic logs, remote control, and safety features. This is a “GAS ONLY” unit. |
Can I put this on a wood floor?Yes. Because this is a B-vent, it has zero-clearance to combustibles. We do recommend using 1/2” cement board beneath the unit when building on a wood subfloor. |
Why would I use a B-vent over Class A chimney?While Class A chimney gives you more flexibility with multiple fuels capability, B-vent can be used in a GAS-ONLY applications. It does have a smaller flue size and more flexibility for difficult venting configurations. |
Can I use Mason-Lite’s brick panel options?Yes |
Can I substitute the burner and log set for something other than the standard inclusion for my B-Vent fireplace?The burner cannot be substituted. |





