Monessen 36" Attribute Universal Circulating Vent Free Firebox
The Monessen Attribute is a circulating vent-free firebox with a radiant clean face and reversible interior panels. It is the shell of the fireplace: it has no burner, so it is paired with a vent-free gas burner and log set of up to 40,000 BTU/hr. This listing is the 36 in. size. Order numbers: ACUF36-BD, ACUF36-GD.
Burner and logs are not included.
What's Included
- Circulating firebox with radiant clean face
- Reversible interior fiber panels in the color you choose, with two looks on one panel
- Mesh screens with hide-away screen pockets
- Hood (must be installed)
- Junction box
- Two-piece hearth that lifts out for access without removing the log set
Key Features
- 36 in. opening, 27 in. high
- Zero clearance to combustible framing on the sides, back, top and bottom
- Circulating design with a hood and hide-away mesh screens
- Takes natural gas or propane vent-free burners up to 40,000 BTU/hr
- Can be finished with non-combustible material up to the opening
- Optional blower, light kit, front and trim kit
What to Order With It
Required: a vent-free gas burner and a matching log set. The firebox accepts any listed vent-free gas log heater up to 40,000 BTU/hr whose minimum fireplace size fits the interior dimensions below. Monessen lists these for this firebox:
Burners:
Log sets:
Each log set needs its own burner: Natural Blaze for Berkley Oak, Highland Oak, Beachcomber and Stony Creek; Glow Getter for Charisma, Dynamo and Moxie; Lumonessen for Mezmer and Mountain Oak. The log set page names the burner size. The Lyric burner uses fire glass and needs no logs.
Optional:
Interior panels:
- 36 in. Reflective Black Glass (A36BGL)
Fronts:
Mesh doors:
Trim kits:
Light kits:
Blowers:
Outside air:
Mantels and shelves:
-
Battlefield Flush Wood Mantel (AFBDMPB, AFBDKAB)
-
Kenwood Flush Mantel (AFKDMPB, AFKDAUB)
-
Kenwood 60" Outside Width Primed MDF Flush Mantel (AFKDMPB60)
-
Roxborough Flush Wood Mantel (AFRHMPB)
-
Wescott Primed MDF Flush Wood Mantel (AFWTMPB)
-
Mantel Shelves for Fireplaces (FMBRMP59, FMBRAU59, FMCYMP59, FMCYAU59, FMFEMP48, FMFEAU48, FMOKMP48, FMOKAU48, FMOKKA48)
Other Monessen mantels, shelves and stone sets can be ordered on request.
Stone surround sets:
Specifications
| Model |
ACUF36 |
| Size |
36 in. |
| Type |
Vent-free firebox (no burner) |
| Maximum Heater Input |
40,000 BTU/hr, for a listed vent-free gas log heater |
| Viewing Opening |
36 in. wide x 27 in. high |
| Gas Supply for the Heater |
Natural gas 5.0 to 10.0 in. w.c. Propane 11.0 to 13.0 in. w.c. |
| Electrical |
Junction box for 110-120 VAC, used by the optional blower and light kit |
| Shipping Weight |
70 lb |
| Safety Listing |
UL listed to CSA/ANSI Z21.91, ventless firebox enclosures |
| Use |
Indoor. Not for a bathroom. In a bedroom only with a heater of 10,000 BTU/hr or less. Not for wood fires, vented gas logs or glass doors. |
Order numbers:
| Order Number |
Interior |
| ACUF36-BD |
Brown Panel |
| ACUF36-GD |
Gray Panel |
Dimensions and Framing
| Front Width |
42 in. |
| Back Width |
31-1/4 in. |
| Height |
34 in. |
| Depth |
20 in. |
| Framing Width |
42-1/2 in. |
| Framing Height |
34-1/4 in. |
| Framing Depth |
19-3/4 in. |
Add 1/2 in. to the framing width and 1/4 in. to the framing height when the optional trim kit is used.
Interior, for sizing a burner and log set:
| Front Width |
32-7/8 in. |
| Back Width |
24-3/8 in. |
| Depth |
15 in. |
| Height |
25-1/2 in. at the front, 22-5/8 in. at the rear |
Clearances to Combustibles
| Firebox Sides, Back, Top and Bottom |
0 in. to combustible framing |
| Ceiling |
42 in. above the top of the firebox opening |
| Side Wall |
9 in. from the firebox opening to a wall at right angles to it |
| In Front |
36 in. to curtains, furniture and other combustible objects |
| Flooring |
Combustible flooring may run up to the front of the firebox. No carpet or vinyl within 14 in. of the opening. |
| Facing |
Only non-combustible material may cover the metal face, up to 4 in. thick. It must not overhang the opening. |
Mantel clearances depend on mantel depth and are measured from the top of the firebox opening. The maximum mantel depth is 18 in. Use the mantel figures in the installation manual; we have not copied them here because they are drawings.
Vent-free gas appliances are not allowed in every state, city or room. Check your state and local codes before you order. Installation and service must be done by a qualified installer.
Warranty
Covered by the Hearth & Home Technologies limited warranty for Monessen products (form 4021-645N, 12/23), which is printed in the owner's manual. Coverage starts on the date of installation and applies to products bought from an authorized dealer. See the manual for the coverage periods, conditions and exclusions.
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