Monessen Lo-Rider 42" Clean Face Vent-Free Gas Firebox

A traditional fireplace presence usually comes with tradeoffs: raised hearths, visible louvers, chimney requirements, or major framing work. The Monessen Lo-Rider Clean Face Vent-Free Gas Firebox is built specifically to eliminate those compromises.

Designed to sit low and install nearly flush with the floor, the Lo-Rider creates a grounded, masonry-style fireplace appearance that feels intentional rather than retrofitted. Its clean-face construction removes visual clutter from the opening, allowing the flame presentation and log set you choose to remain the focal point. Behind the scenes, the firebox geometry is engineered to move heat forward into the room using angled surfaces and controlled air channels rather than relying on exposed vents or bulky grilles.

This firebox is intended for homeowners and builders who want full design control. By pairing it with a compatible vent-free gas log set and optional interior panels, the Lo-Rider becomes a flexible foundation for both classic and modern fireplace installations, without the constraints of venting or a chimney chase.

Features

• Vent-free gas firebox designed for clean, low-profile installations

• Nearly floor-level installation for an authentic hearth-style appearance

• Clean-face, louverless opening keeps sightlines clear

• Deep firebox accommodates a wide range of compatible vent-free gas log sets

• Angled firebox construction improves heat movement into the living space

• Engineered air channels help distribute warmth efficiently

• Integrated mesh safety screen with concealed storage pockets

• Interior liner options available to tailor the look of the firebox

• Heavy-duty construction designed for long-term residential use

What’s Included

• Firebox assembly – 1 set

• Reversible liner – 1 set

• User’s manual – 1

Optional fronts, lighting kits, reflective panels, fan kits, trim kits, and vent-free log sets are sold separately.

Specifications & Downloads

• Overall Dimensions: 34" H x 48" W x 23" D
• Framing Dimensions: 34 1/4" H x 48 1/2" W x 22 3/4" D
• Viewing Area: 30" H x 42" W
• Weight: 210 lbs
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• Installation Type: Vent-free gas firebox
• Certification: UL Listed
• Country of Origin: Made in the USA
• Warranty: Limited Lifetime Warranty

  

This installation must conform with local codes. In the absence of local codes you must comply with the National Fuel Gas Code, ANSI Z223.1- latest edition in the U.S.A. and the CAN/ CGA B149 Installation codes in Canada.

This heater shall not be installed in a confined space or unusually tight construction unless provisions are provided for adequate combustion and ventilation air.

DO NOT INSTALL THIS MODEL IN A BEDROOM OR BATHROOM.

WARNING: This product and the fuels used to operate this product (liquid propane or natural gas), and the products of combustion of such fuels, can expose you to chemicals including benzene, which is known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.