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Monessen > GCUF GRUF Series Vent Free Gas Firebox

Create A Custom Look

The GRUF/GCUF series fireboxes provide the option to choose a louvered design or a radiant, clean face design. Choose from a selection of firebrick options and accessories for a fireplace perfectly suited to the design you prefer.

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.

Trim Kits

Three different trim styles allow you to blend your new fireplace insert into your existing decor with ease.

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.

Black Cabinet Door Frames

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

Black Cabinet Doors with Screen

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

Filigree Panels

These designer panels add a delicate elegance to your product.

Wall Cabinets

Available in two sizes, these surrounds give a built-in look to your product's wall installation. Choose between a Honey Oak or Dark Cherry finish.

Corner Cabinets

Available in two sizes, these surrounds are designed to finish out your product's corner installation. Choose Honey Oak or Dark Cherry finish.



Size 42" 36" 32"
Styling Refractory Firebrick or Cottage Clay Firebrick Refractory Firebrick or Cottage Clay Firebrick Refractory Firebrick or Cottage Clay Firebrick
Dimensions 47 (W) x 34-1/2 (H) x 18 (D) 41 (W) x 34-1/2 (H) x 18 (D) 37 (W) x 34-1/2 (H) x 16 (D)
Hearth Dimensions 40 (W) x 21-7/8 (H) x 15-3/4 (D) x 33-3/8(RW) 34 (W) x 21-7/8 (H) x 15-3/4 (D) x 27-3/8(RW) 29-7/8 (W) x 21-7/8 (H) x 13-1/4 (D) x 23-3/8(RW)
Fire Viewing Area 40" x 21-3/4" 34" x 21-3/4" 29-7/8" x 21-3/4"
Viewing Style Front Front Front
Venting Vent Free Vent Free  Vent Free
Heat Distribution  Radiant/Circulating   Radiant/Circulating Radiant/Circulating
Termination None None None
Certifications CSA Design 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

Owners Manual

Specifications Sheet: 32" Models

Specifications Sheet: 36" Models

Specifications Sheet: 42" Models