Napoleon Oakville X4 Direct Vent Gas Insert (GDIX4N-1), natural gas direct vent fireplace insert from the Napoleon April 2025 MSRP Price Guide (effective April 2025). The largest Oakville, with an exclusive dual burner split-flow system that produces a triple flame pattern and lets you operate the front and rear burners independently, plus NIGHT LIGHT detail. Split Oak log set, heat-circulating blower, remote control and eFIRE app control included. SIT Proflame II electronic ignition. Maximum heat output: 40,000 BTU/h natural gas (36,000 BTU/h propane with conversion kit); front and rear burners modulate from 16,000 BTU/h. Overall dimensions: 24 9/16" H x 33 3/4" W x 17 3/4" D; minimum framing dimensions: 24.56" H x 34.13" W x 18.75" D. Viewing area: 27 3/4" x 18 11/16" (518 sq. in.). Direct vent, 3" x 3" liner venting. Required: select your Decorative Panels below — this is a separate, required component priced individually and must be chosen to complete checkout; it is not included in the base price shown here. Optional: choose your Backerplate (the medium 3-sided backerplate) and/or a Faceplate (a faceplate can be ordered with or without the backerplate), and Fuel Conversion (natural gas as shipped, or the propane conversion kit). Each option shows its own price; the variant price is the complete configured total. Other backerplate sizes, individual faceplates, birch and driftwood log sets, riser boxes, remotes, the propane-to-natural-gas reconversion kit and direct vent venting components are available as separate products.

Manufacturer product page: https://www.napoleon.com/en/us/fireplaces/products/fireplace-remodeling/gas-inserts/oakville-series/oakville-x4-gdix4n-1