Montigo L42DF-ST See-Through Direct Vent Fireplace, 42"

The Montigo L42DF-ST is built around a single compelling idea: fire you can see from both sides. Its see-through direct vent design creates a genuine architectural passage of flame between two spaces — a dining room and a living room, an office and a lobby, a bedroom and a bath — without sacrificing efficiency or safety. At 34,000 BTU with a 2nd Generation Linear Burner, this is a fireplace that does real heating work, not just ambiance.

Ignition is handled by a SIT Proflame IPI (Intermittent Pilot Ignition) system, which means the pilot lights only on demand — no standing pilot burning gas around the clock. The SIT gas valve pairs with a Hi/Lo flame control adjustable ±30%, giving you nuanced command over both heat output and visual intensity. For installations that benefit from remote or thermostat operation, the L42DF-ST is fully compatible with Montigo's IPI Wireless Remote Control Kit, Digital Thermostat (programmable and non-programmable), and Emergency Battery Back-up for those moments when the power has opinions of its own.

Venting is convertible between top and rear configurations using 5"/8" direct vent, and the unit is Power Vent compatible — useful for installations where a straight shot to the exterior isn't on the table. Flexmaster flex venting is also supported, broadening your rough-in options considerably. The framing opening measures 45" wide x 40" tall x 23 3/4" deep.

The black rectangular door with tempered glass and snap-lock closure gives the front face a clean, contemporary finish. Inside, the burner can be dressed with ice fireglass or glass media for a modern linear aesthetic. The included 6-piece galvanized steel heat shield kit protects adjacent combustible materials and is ready to install out of the box.

As part of Montigo's B, H, and L-Series ecosystem, the L42DF-ST is compatible with Fan Speed Control Kits for active heat circulation, Decorative Surrounds in Satin Black or Stainless Steel, and the full range of optional fan kits. The SIT IPI wiring system used in this model (SKU L42FSDNI) is consistent across the L42 series, making accessory integration and future upgrades straightforward. This is a fireplace engineered to be configured, not just installed.

• 34,000 BTU 2nd Generation Linear Burner — genuine heat output, not just visual effect
• See-through direct vent design creates a continuous flame view between two rooms
• SIT Proflame IPI ignition: pilot fires on demand, no standing pilot waste
• Hi/Lo flame control adjustable ±30% for fine-tuned heat and ambiance
• Convertible top or rear vent (5"/8" direct vent); Power Vent compatible
• Flexmaster flex venting supported for flexible installation routing
• Framing opening: 45" W x 40" H x 23 3/4" D
• Black rectangular door with tempered glass and snap-lock closure
• Compatible with ice fireglass and glass media for a contemporary linear look
• 6-piece galvanized steel heat shield kit included
• Compatible with Montigo B, H, and L-Series accessories: wireless remote, fan kits, programmable thermostat, battery back-up, and decorative surrounds in Satin Black or Stainless Steel