
WARM
WELCOME
Nothing invites or delights like the
dancing flames of a fire.For thousands
of years fire has been the focal point of
hearth and home and, like so many
families before,we invite you to sit
by ours and enjoy their warmth
and beauty.
GRUF36CF vent free firebox with Cottage
Clay firebrick and optional fiber ceramic gas logs
MCUF36D vent free firebox with Herringbone brick, optional black arched front and black fire screen doors and optional refractory cement gas logs

VENT FREE FIREBOXES
The G(C/R)UF series of vent free fireboxes from Monessen offers flexibility with 3 sizes - 32, 36 and 42
inches - and the option of circulating or radiant design to suit your requirements perfectly. Available
with your choice of firebrick as well as a range of optional accessories, the G(C/R)UF series is easy to
incorporate into your design requirements.
It's easy to incorporate the timeless elegance and satisfying warmth of fire into your home with the
vent free firebox series from Monessen. Our Magnum MCUF series is available in either 36 or 42 inch
sizes with your choice of standard Cottage Clay or Herringbone firebrick. With radiant design and a
wide variety of optional accessories, you can frame your fireplace right up to the firebox and finish it
with a custom look.
For the look of a more traditional hearth, our Lo-Rider LCUF series is available in both 32 and 36 inch
sizes. With its low profile hearth the firebox appears to nearly rest on the floor and it offers an extra
large viewing area. Standard Herringbone firebrick is supplied on both the 32 and 36 inch sizes - so all
you have to do is select your optional accessories to make these exceptional vent free fireboxes from
Monessen truly your own.
LCUF36C vent free firebox with optional Iron
Age rectangular face and Federal doors

LPF36 Peninsula vent free firebox with optional DST gas logs
Designer Vent Free Lo-Rider Fireboxes
LSTF36 see-thru vent free firebox
Our Monessen vent free fireboxes also come in exciting
designer styles that offer dynamic design
applications.Available in See-Thru, Peninsula and
Corner models, these sophisticated fireboxes add style
and warmth to your rooms while maintaining a
contemporary feel.
BUF400 vent free firebox
BUF500 vent free firebox
BUF400 and BUF500
Vent Free Fireboxes
Our BUF line of vent free fireboxes from Monessen offer
a zero clearance design, allowing you to install next to
wood, sheetrock or other construction materials. With a
true 36 or 42 inch brick to brick opening, the BUF400
and BUF500 offer a truly expansive view of the flames.
Shipped with standard refractory firebox liner and black
facing, the BUF series is a versatile vent free option for
any design application.

STANDARD FEATURES:
• CSA design certified to fit most 18," 24," and 30"
vent free log sets
• Zero clearance design for ease of installation
• Gas knock out available on left and right side of units
• No expensive flue, or hearth required making installation versatile
BUF:
• Available with true 36" and 42" fireplace opening
• Shipped standard with refractory firebrick
• Radiant face design with heat circulating air ducts for optional
blower
GCUF/GRUF:
• Available with true 32," 36," and 42" fireplace opening
• Can be ordered with black box interior, with standard Cottage
Clay firebrick, or refractory firebrick
• Available in Radiant Face or Circulating Face designs
MCUF Magnum:
• Available with true 36" and 42" fireplace opening
• Available with Cottage Clay firebrick or refractory Herringbone
firebrick
LCUF Lo-Rider
• Available with true 32" and 46" fireplace opening
• Available with refractory Herringbone firebrick
• Tallest opening available for full view of fire
• Outside air kit option
• Standard curtain mesh screens for true fireplace appeal
• Standard junction box included for electrical hook up blower kit
(except LCUF)
• Can be installed with non-combustible material up to the opening of fireplace for true masonry look
• Radiant design with heat circulating air ducts for optional
blower
• Can be installed with non-combustible material up to the opening of fireplace for true masonry look
• Radiant face design with heat circulating air ducts for optional
blower
• Can be installed with non-combustible material up to the opening of fireplace for true masonry look
• Installs with base almost flush with finished hearth area
• Can be installed with non-combustible material up to the opening of fireplace for true masonry look
Lo-Rider Designers
• Available in Peninsula, See-Thru and Left & Right Corner styles
• Available with refractory Herringbone firebrick
• Tallest opening available for full view of fire
• Radiant face design with heat circulating air ducts for optional
blower
Optional Accessories
• FA2 blower option for BUF fireboxes
• AK4 outside air kit for all fireboxes
• BLOTMC blower option for GCUF/GRUF and MCUF
fireboxes
• Black radiant face kit for GCUF circulating models to
convert to radiant models
• Curved Black, Brass, and Pewter trim kits for
GCUF/GRUF/MCUF/LCUF fireboxes
• Medium Black, Brass, Pewter trim kits for GCUF
fireboxes
• Optional Cottage Clay and Cottage Red firebrick for
GCUF/GRUF fireboxes
• Optional Polished Brass hoods for
GCUF/GRUF/MCUF/LCUF fireboxes
• Optional Classic and Manor faces available for
GCUF/GRUF/MCUF fireboxes
• Optional corner or wall cabinets for
GCUF/GRUF/MCUF/LCUF fireboxes
Classic faces available for GCUF/GRUF/MCUF fireboxes
Manor faces available for
GCUF/GRUF/MCUF fireboxes
• Installs with base almost flush with finished hearth area opening
of fireplace for true masonry look
• Can be installed with non-combustible material up to the opening of fireplace for true masonry look
Variable speed blower optional
Cottage Clay fire-
brick
Cottage Red fire-
brick
Medium
Pewter trim
Medium
Brass trim
Medium
Black tarim

Vent Free Fireboxes
Model BUF400 BUF500
Actual Dimensions 40"W x 34"H x 21"D 46"W x 34"H x 21"D
Framing Dimensions 40-1/2"W x 34-1/2"H x 20-1/2"D 46-1/2"W x 34-1/2"H x 20-1/2"D
Viewing Area 21-1/2"H x 35-1/2"W (763SQ. IN.) 21-1/2"H x 41-1/2"W (892SQ. IN.)
Minimum Hearth Area 35-1/2"W x 21-1/2"H x 17"D x 20-3/8"RW 41-1/2"W x 21-1/2"H x 17"D x 26-3/8"RW
Blower Optional Optional
Model GCUF32/GRUF32 GCUF36/GRUF36 GCUF42/GRUF42
Actual Dimensions 37"W x 34-1/2"H x 16"D 41"W x 34-1/2"H x 18"D 41"W x 37-3/8"H x 18"D
Framing Dimensions 37-1/4"W x 35"H x 15-1/2"D 41-1/4"W x 35"H x 17-1/2"D 47-1/4"W x 35"H x 17-1/2"D
Viewing Area 21-7/8"H x 29-7/8"W (653SQ. IN.) 21-7/8"H x 34"W (743SQ. IN.) 21-7/8"H x 40"W (875SQ. IN.)
Minimum Hearth Area 29-7/8"W x 21-7/8"H x 13-1/4"D x 23-3/8"RW 34"W x 21-7/8"H x 15-3/4"D x 27-3/8"RW 40"W x 21-7/8"H x 15-3/4"D x 33-3/8"RW
Blower Optional Optional Optional
Model MCUF36 MCUF42
Actual Dimensions 41"W x 37-3/8""H x 18"D 47"W x 34-1/2 H x 18"D
Framing Dimensions 41-1/4"W x 37-5/8"H x 17-3/4"D 47-1/4"W x 37-5/8"H x 17-3/4"D
Viewing Area 25"H x 32-1/8"W (803SQ. IN.) 25"H x 38-1/8"W (953SQ. IN.)
Minimum Hearth Area 32-1/8"W x 25"H x 14-3/4"D x 25-3/4"RW 38-1/8"W x 25"H x 14-3/4"D x 31-3/4"RW
Blower Optional Optional
Model LCUF32 LCUF36
Actual Dimensions 37"W x 34-3/8"H x 16"D 41"W x 37-3/8"H x 18"D
Framing Dimensions 37-1/4"W x 34-5/8"H x 15-1/2"D 41-1/4"W x 37-5/8"H x 17-1/2"D
Viewing Area 28"H x 28-5/8"W (801SQ. IN.) 30-1/4"H x 32-1/2"W (983SQ. IN.)
Minimum Hearth Area 28-5/8"W x 28"H x 12-3/4"D x 26-3/8"RW 32-1/2"W x 30-1/4"H x 15"D x 25-7/8"RW
Blower Not Optional Not Optional
Model LSTF36 LPF36 L(R/L)CF36
Actual Dimensions 39-1/2"W x 37-3/4"H x 23-3/4"D 39-1/2"W x 37-3/4"H x 23-3/4"D 39-1/2"W x 37-3/4"H x 23-3/4"D
Framing Dimensions 40"W x 38"H x 22-1/2"D 39"W x 38"H x 22-1/2"D 39"W x 38"H x 23-1/8"D
Viewing Area 21-1/2"H x 36"W (774SQ. IN.) 21-1/2"H x 36"W (774SQ. IN.) 21-1/2"H x 36"W (774SQ. IN.)
Minimum Hearth Area 36"W x 21-1/2"H x 20-1/4"D 36"W x 21-1/2"H x 20-1/4"D 36"W x 21-1/2"H x 20-1/4"D
Blower Optional Optional Optional
HPBA
MADE IN U.S.A.
Hearth, Patio & Barbecue Ass ociation
Your Monessen Dealer:
Monessen
A Brand of Monessen Hearth Systems Co.
149 Cleveland Drive, Paris, Kentucky 40361
www.monessenhearth.com
To avoid personal injury or property damage, the product described by this brochure must be installed, operated and maintained in strict compliance with the instructions packaged with the
product and all applicable building or fire codes. Contact local building or fire officials about restrictions and installation inspection requirements. All photographs and drawings on this
brochure are for illustrative purposes only and are not intended for, nor should they be used as a substitute for the instructions packaged with the unit. Appearance and specifications of the
product are subject to change without notice. © 2008 Monessen Hearth Systems Co.
Ver.03 MON8108