Monessen LSTF36-B Lo Rider See-Thru Vent Free Firebox


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Monessen LSTF36-B Lo Rider See-Thru Vent Free Firebox w/traditional refractory firebrick standard

The LSTF36-B Lo-Rider Designer vent free firebox is available as a see-through model, adding style and warmth to multiple rooms while maintaining a contemporary feel. The louver-less design provides a clean exterior for an ultra sleek look. For a true masonry look, the LSTF36-B Lo-Rider Series features a low profile hearth, so the firebox appears to nearly rest on the floor, providing the tallest fireplace opening and a truly expansive viewing area. Because LSTF36-B Lo-Rider Series vent free fireboxes and log sets 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 or cost prohibitive to install a vented fireplace. They provide the most economical installation, only requiring a connection to a gas line.

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. Enjoy beautiful flames, excellent heating and a customized look with the addition of the 27″ Monessen Natural Blaze See Thru Log Set.


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 fireplace (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 burner) of your choice to complete it.

Quick Look:

  • Tallest opening available for full view of fire
  • Low profile hearth
  • Hide-away screen pockets
  • True masonry look
  • Radiant face design with heat circulating air ducts for optional blower (BLOTDL)
  • Accent Light kit available (MONALST)

Also available sold separately:

AK22 Outside air kit (1 each) – Flex Venting not included

ID4 4″ (100mm) insulated flex duct for outside air – includes two 42″ (1065mm) sections

UD4 4″ (100mm) uninsulated flex duct for outside air – includes two 42″ (1065mm) sections

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

Weight185 lbs
Product Size (Width)


Product Style: Gas Log Sets

See Through


LoRider Designer 36

Appliance Width:45″
Appliance Height:34-1/4″
Appliance Depth:24″
Hearth Front Width:33-1/2″
Hearth Front Height:27-3/4″
Hearth Depth:19″
Hearth Rear Width:33-3/16″
Hearth Rear Height:27-3/4″
Viewing Area:36 x 30-3/4″


Lo-Rider LSTF36-B Installation Manual – Vent Free Firebox


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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