Monessen BUF36-T 36″ Exacta Vent free firebox with Stacked Traditional interior panels



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Monessen BUF36-T 36″ EXACTA Vent Free Circulating firebox with Stacked Traditional interior panels.

Monessen BUF36-T 36′ EXACTA Vent Free Firebox enjoy the fireplace you’ve always wanted, expansive views and all. Combined with a Monessen vent free log set (sold separately), the Exacta firebox provides warmth and ambiance to practically anywhere. The Monessen BUF36-T Exacta delivers maximum airflow, efficiently adding heat to your home, while the zero clearance design gives you flexibility, and helps save installation dollars.

Monessen offers one of the most diverse lineups of vent free gas fireboxes available, making it easy to find the right look for your home. With the addition of a Monessen vent free log set, you can enjoy beautiful flames, excellent, cost-efficient heating and a customized look, all without the hassle of extensive renovations or costly remodels.

Available with Herringbone (BUF36-H), or Traditional stacked concrete interior panels (BUF36-T), or no interior panels at all (BUF36A)


  • Circulating firebox with radiant clean face with Stacked Traditional interior panels
  • Features mesh screens with hide-away pockets and junction box
  • Monessen exclusive two-piece hearth for easy access without removing log set
  • Recommended 24″ log set
  • Viewing Area: 36″W X 27″H
  • Framing: 42-1/2″W X 34-1/4″H X 19-3/4″D


A Monessen vent free firebox is the perfect way to display and operate your Monessen vent free log set. While our log sets can be utilized in an existing approved wood burning fireplaces (converted with a gas line), if your home does not already have an existing fireplace, a vent free firebox is an economical way to add a fireplace to your home.

Installed in either your wall or a free-standing cabinet, a vent free firebox is simply the metal combustion chamber of a traditional fireplace system, without the log set and engine. You then add the vent free log set (with engine) of your choice to complete it. By contrast, a vent free fireplace system includes the firebox, log set and engine as a package. It too can be installed either in a wall or a free-standing cabinet.

In either situation, since no venting is required, installation is faster and easier than with a traditional vented system.


Monessen offers a wide selection of Vent Free Log Sets (sold separately) that are a perfect complement to your new firebox.

  • No chimney or venting required makes installation fast, easy, and affordable
  • Clean, louver-less design
  • Tuck the screen into hideaway pockets to reveal expansive views
  • Black interior provides elegant background for vent free log set
  • Brick interior available for a traditional look
  • Large hearth area allows for a variety of log sets
  • Angled firebox and uniquely engineered air channels move more heat into the room, maximizing efficiency
  • Available in 32″, 36″ or 42″ models

Also available sold separately:

36″ Contemporary Front

Interior Accent light kit

36″ Interior Reflective Black Glass Panels


160 CFM Fan kit

Trim Kit for 36″

Outside Combustion Air Kit with Access Door

UL design certified to ANSI Z221.91.A2002

NOTE: Vent Free Products are not approved in Canada and some States. Please check your local codes regarding vent free products.

Weight140 lbs
Product Size (Width)



Exacta BUF36A

Appliance Width:42″
Appliance Height:37-1/4″
Appliance Depth:23″
Hearth Front Width:33-3/4″
Hearth Front Height:21-3/4″
Hearth Depth:17-7/8″
Hearth Rear Width:25-3/4″
Hearth Rear Height:20-3/8″
Viewing Area:36 x 24″


Monessen BUF_Series_Install_4139-901

Monessen BUF_Series_Owners_4139-900

Monessen Exacta_BUF36_Firebox_ArchitectGuide


Limited Lifetime Warranty

Our Limited Lifetime Warranty is the strongest and most comprehensive in the industry. It illustrates our commitment to producing the best and most reliable products available—and allows you to own your hearth appliance with confidence. Season after season, year after year.

Monessen will make available replacement parts for parts that are defective according to the following terms.
Logs – A free replacement will be made available at our factory for any logs if they fail due to deterioration within two (2) years of the verified purchase.
Steel Burner – A free replacement will be made available at our factory for the burner if it fails to deterioration within 10 years of the verified purchase date.
All Other Parts – A free replacement will be made available at our factory for any part that is defective within two (2) years of the verified purchase date.



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