Buck Stove 42ZCBB Vent-Free Firebox Enclosure | Natural Gas | 42-Inch Zero-Clearance Fireplace Box | Up to 40,000 BTU

• 42-inch vent-free firebox enclosure for natural gas

• Zero-clearance (ZC) design for flexible framing

• Accepts vent-free gas logs up to 40,000 BTU/hr

• No chimney or venting required

• Ideal for residential & approved manufactured homes

• Optional blower, mantel front, and wooden surround available

• Made in the USA by Buck Stove

The Buck Stove 42ZCBB / NV 42ZCBB Vent-Free Firebox Enclosure is a 42-inch, zero-clearance universal firebox engineered for use with listed vent-free natural gas log sets. Designed for both residential homes and approved manufactured housing, this enclosure delivers the appearance of a full-size masonry fireplace—without the cost or complexity of chimney installation.

Built by Buck Stove in the USA, the 42ZCBB is rated to accept vent-free gas logs up to 40,000 BTU/hr, providing strong supplemental heat while maintaining flexible installation options. Its zero-clearance construction allows direct framing against combustible materials when installed according to manufacturer guidelines, making it ideal for new construction, remodels, and custom fireplace projects.

The larger 42-inch opening creates a bold visual focal point and pairs perfectly with optional accessories such as wooden surrounds, flush mount mantels, and optional blower kits. Factory-installed safety screens and a heavy-duty steel firebox ensure durability, safety, and long-term performance.

If you’re looking for a large vent-free natural gas fireplace enclosure with trusted American manufacturing, flexible installation, and classic design, the Buck Stove 42ZCBB is a proven, contractor-approved solution.

Technical Specifications:

• Product Type: Vent-Free Firebox Enclosure

• Model Numbers: 42ZCBB / NV 42ZCBB

• Fuel Compatibility: Natural Gas

• Maximum BTU Capacity: Up to 40,000 BTU/hr (log-set dependent)

• Vent Type: Vent-Free (Unvented)

• Installation Type: Zero-Clearance / Built-In

• Firebox Opening Width: 42 inches (nominal)

• Approved Applications: Residential & approved manufactured homes

• Construction: Heavy-duty steel firebox with factory canopy

• Clearances: Zero-clearance to combustible framing (per manual)

• Certification: ANSI Z21.91 Vent-Free Firebox Enclosures

• Manufactured By: New Buck Corporation (USA)

• Resources: User Manual

Optional Accessories:

• Optional blower kit

• Flush mount mantel (FF)

• Wooden surround (WS)

Important Compliance Note:

This product is a firebox enclosure only and must be paired with a listed vent-free decorative natural gas log set. It is not a standalone heater. Proper combustion air and installation clearances must be followed per applicable codes.