Monessen BUF42-T 42″ Exacta Vent Free Firebox W/Stacked Traditional interior panels



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Monessen BUF42-T 42″ EXACTA Vent Free Firebox W/Stacked Traditional interior panels.

Monessen BUF42-T EXACTA 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 anyone, anywhere. The BUF42-T Exacta delivers maximum airflow, efficiently adding heat to your home, while the zero clearance design gives you flexibility, and helps save installation dollars.

Available with Herringbone (BUF42-H), or Traditional stacked concrete interior panels (BUF42-T), or no interior panels at all (BUF42A)

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.


  • Circulating firebox with radiant clean face
  • Features mesh screens with hide-away pockets and electrical junction box
  • Monessen exclusive two-piece hearth for easy access without removing log set
  • Available in 32″, 36 or 42″ models
  • No chimney or venting required makes installation fast, easy, and affordable
  • Large hearth area allows for a variety of log sets
  • Viewing Area: 42″W X 27″H
  • Framing: 48-1/2″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. Ask your dealer for more information on choosing the right size and style for your space.

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.

Weight155 lbs
Product Size (Width)



Exacta BUF42-T

Appliance Width:48″
Appliance Height:37-1/4″
Appliance Depth1:23″
Hearth Front Width:39-3/4″
Hearth Front Height:21-3/4″
Hearth Depth:17-7/8″
Hearth Rear Width:28-3/4″
Hearth Rear Height:20-3/8″
Viewing Area:42″ x 24″


Monessen BUF_Series_Install_4139-901

Monessen BUF_Series_Owners_4139-900

Monessen Exacta_BUF42_Firebox_ArchitectGuide



Hearth & Home Technologies LLC

HHT warrants that the Products and their Component Parts will be free from defects in materials and workmanship for the applicable period of Warranty coverage set forth in the owners manual (“Warranty Period”). If a Product or Component Parts are found to be defective in materials or workmanship during the applicable Warranty Period, HHT will, at its option, repair the applicable Component Part(s), replace the applicable Component Part(s), or refund the purchase price of the applicable Product(s). The maximum amount recoverable under this Warranty is limited to the purchase price of the Product. This Warranty is transferable from the original purchaser to subsequent owners, but the Warranty Period will not be extended in duration or expanded in coverage for any such transfer. This Warranty is subject to conditions, exclusions, and limitations as described in the owners manual.


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