Monessen Exacta 42" Ventless Firebox
The Monessen Exacta 42" Ventless Firebox combines advanced technology with classic design, providing efficient warmth and an inviting ambiance. Paired with a Monessen vent-free log set, this firebox creates a cozy focal point with its clean, louverless design that adds a touch of sophistication to any space.
With minimal framing and hideaway screen pockets, the Exacta ensures an expansive, uninterrupted view of the flames. Its angled firebox and uniquely engineered air channels enhance heat circulation, maximizing warmth while reducing fuel costs—all without the need for venting.
Equipped with a circulating firebox, radiant clean face, mesh screens, hood, and a junction box for safety, the Exacta also includes Monessen’s exclusive two-piece hearth, allowing easy access without log removal. Certified to ANSI standards, the Monessen Exacta 42" Ventless Firebox delivers both style and safety, making it a functional, visually appealing addition to your home.
Features:
- Minimal exposure of the firebox provides a clean, traditional fireplace appearance.
- Screens tuck away into hidden pockets to reveal expansive views.
- An angled firebox and uniquely engineered air channels move more heat into the room, allowing unrestricted airflow, maximizing efficiency and reducing fuel costs.
- Vent-free Technology.
- Circulating firebox with radiant clean face.
- Features mesh screens with hide-away screen pockets, hood, and junction box.
- Monessen exclusive two-piece hearth for easy access without removing log set.
- UL design certified to ANSI Z221.91.A2002.
Venting:
Insulated Flex Duct – Chimney Air Kits/Flex Duct
Used for bringing in outside air with insulation to improve thermal efficiency.
- ID4: 4" (100mm) Insulated Flex Duct for Outside Air
- Includes two 42" (1065mm) sections.
- For providing insulated air supply for combustion systems.
Outside Air Kit
Provides a complete solution for bringing in outside combustion air with an access door.
- AKD: Outside Combustion Air Kit with Access Door
- For easy access and controlled delivery of outside air to the combustion chamber.
Uninsulated Flex Duct – Chimney Air Kits/Flex Duct
For bringing in outside air without insulation.
- UD4: 4" (100mm) Uninsulated Flex Duct for Outside Air
- Includes two 42" (1065mm) sections.
- For providing outside air supply in settings where insulation is not required.
Specifications:
- Model: Exacta BUF 42
- Unit Width: 48"
- Unit Depth: 23"
- Unit Height: 34"
- 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"
Downloads:
Technical Specifications:
A. Dimension Specifications:
- Front Width:
- Actual: 48"
- Framing: 48-1/2"
- Back Width:
- Actual: 37-1/4"
- Framing: 48-1/2"
- Height:
- Actual: 34"
- Framing: 34-1/4"
- Depth:
- Actual: 20"
- Framing: 19-3/4"
- Viewing Area: 42" x 27"
B. Firebox Certification
- Models: BUF32A, BUF36A, BUF42A, BUF32-T, BUF36-T, BUF42-T, BUF32-H, BUF36-H, BUF42-H.
- Laboratory: Underwriters Laboratories, Inc. (UL).
- Type: Ventless Firebox Enclosures for Gas-Fired Unvented Decorative Room Heaters.
- Standard: CSA/ANSI Z21.91-20.
- Notes:
- Installation must conform to local codes or the National Fuel Gas Code (ANSI Z223.1/NFPA 54).
- Smoke/Carbon Monoxide Alarm Recommendations:
- Place alarms 15 to 20 feet away from fuel-burning sources.
- Wall mounting reduces nuisance alarms compared to ceiling placement.
C. BTU Specifications
- For use ONLY with listed decorative "Gas-Fired Unvented Room Heaters."
- Maximum Allowable BTU/hr (Altitude: 0-2000 ft):
- BUF32 A/T/H: 40,000 BTU.
- BUF36 A/T/H: 40,000 BTU.
- BUF42 A/T/H: 40,000 BTU.
D. High Altitude Installations
- Heating Value Reduction:Above 2000 feet:
- USA: Reduce input rate by 4% per 1000 feet.
- Check with local gas utility for proper orifice size.
E. Non-Combustible Materials Specification
- Includes materials such as steel, iron, brick, tile, concrete, slate, glass, or plaster.
- Materials passing ASTM E 136 standard (750 °C) are considered non-combustible.
F. Combustible Materials Specification
- Includes materials made of or surfaced with:
- Wood, compressed paper, plant fibers, plastics, or other ignitable materials.
G. Electrical Codes
- Appliances must be electrically wired and grounded according to local or ANSI/NFPA 70-latest edition codes.
Warnings
- Not for Primary Heat Source:
- For supplementary or decorative use only.
- California Proposition 65:
- Exposure to combustion byproducts may cause cancer and reproductive harm (e.g., benzene). For more information: www.P65Warnings.ca.gov.
Downloads:
Firebox
- Product Brochure
- Exacta Installation Manual
- Exacta Owners Manual
- Exacta 42" Service Parts
- Exacta 42" Spec Sheet
- Product Warranty
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