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Monessen > Magnum Vent Free Firebox

Perfect For Larger Rooms

This firebox offers a radiant design and taller opening to help warm larger rooms. Finish your fireplace right up to the firebox and select interior and exterior style options for a custom look.

Save Energy And Maximize Heat

Vent free gas fireplaces (available in natural gas and propane) are a safe, green and energy efficient way to add heat to your home — in fact, they’re 99.9% energy efficient. Because they are vent free, none of the heat gets lost up a vent, flue or chimney. Instead, fuel dollars get transformed into heat-warming energy. Plus, you can always be assured of a heat source, even in the event of a power outage.

Install It Where You Want It

Because vent free fireplaces are designed to be installed and operated without a chimney, flue or vent, they can be installed in locations in your home where it would be impossible to install a vented fireplace. They provide the most economical installation, only requiring a connection to a gas line.

Create Your Own Look

With multiple facing and firebrick options available, you can tailor the look of the fireplace to suit your tastes and décor.

You’re In The Clear

Monessen vent free fireplaces allow for zero clearance installation, which means they may be installed flush against any combustible surface such as drywall or wood. This gives you added flexibility and helps save installation dollars when deciding where to install your fireplace, whether on an interior or exterior wall.

Complete Your Look

Monessen offers a selection of vent free log sets (sold separately) that are a perfect complement to your new fireplace. Ask your dealer for details.


Accessories That Fit Your Home And Lifestyle

Blower Kit

Power up your heat output with a variable thermostatic forced air blower.

Curved Trim Kits

Available in two sizes and two colors, these curved trim kits must be attached before installing the product in the wall.

Outside Combustion Air Kit

Draws in outside combustion air for your firebox rather than pulling it from the room. 

Arched Fronts

These classic arched fronts feature a lower door for control access.

Cabinet Door Frames

Available in two sizes, these frames are required for cabinet door installation.

Cabinet Doors with Screen

Available in two sizes, these screened door sets provide a decorative accent that adds allure to your firebox.



Size 42" 36"
Styling Ceramic Fiber 3D Firebrick or Herringbone Firebrick Ceramic Fiber 3D Firebrick or Herringbone Firebrick
Dimensions 47 (W) x 37-3/8 (H) x 18-1/4 (D) x 38 (RW) 41-1/4 (W) x 37-3/8 (H) x 18-1/4 (D) x 32 (RW)
Hearth Dimensions 38-1/8 (W) x 25 (H) x 15 (D) x 31-3/4(RW) 32-1/8 (W) x 25 (H) x 15 (D) x 25-3/4(RW)
Fire Viewing Area 42" x 26-1/4" 36" x 26-1/4"
Viewing Style Front Front
Venting Vent Free  Vent Free 
Heat Distribution Radiant  Radiant
Termination None None
Certifications CSA Design CSA Design


Visit our showroom today and speak with one of our knowledgable sales staff to begin designing "Your Fireplace".


Support & Downloads

Product Brochure

Owner's Manual

Specifications Sheet: 36" Models

Specifications Sheet: 42" Models