Napoleon Oakville X4 Gas Insert Selection and Installation
A larger flame presentation for a fireplace with room to accommodate it
For a larger existing hearth, the Napoleon Oakville X4 offers a broad, layered log-fire presentation and a dual-burner system with full modulation of the front and rear burners. It is worth considering when you want a substantial visual focal point as well as useful warmth for your living space.
Serving the Triangle and surrounding Central North Carolina communities.
You don’t need to choose a model before contacting Chimneys Plus. We can help you compare appearance, heating goals and installation requirements, then select an insert that works with your fireplace.
Contact Chimneys Plus to explore the right insert for your fireplace.
Why consider the Oakville X4?
- A larger view with a selectable second burner. The X4 combines a larger viewing area with a split-flow burner arrangement, included blower and Night Light illumination. Napoleon describes the dual-burner system as fully modulating both the front and rear burners. Chimneys Plus can help you decide whether its size and heat range suit the room rather than simply choosing the biggest insert that fits.
- Useful room warmth. A sealed gas insert can make an underused hearth a more practical part of everyday life.
- Backup warmth when prepared. Gas-fire operation can continue during an outage with the required gas supply and working backup batteries; mains-powered accessories do not operate.
- Outside air for combustion. The direct-vent system keeps combustion separate from room air and vents exhaust outdoors.
An open fireplace draws air your home has already heated into the fire and sends it up the chimney, carrying much of the fire’s heat with it. A direct-vent gas insert draws combustion air from outdoors instead and delivers useful warmth into the room.
An insert inside your existing fireplace
This appliance is installed inside an eligible existing wood-burning masonry or prefabricated fireplace. It does not replace the entire fireplace, and it is not a freestanding unit or a built-in fireplace that can be framed into a new wall on its own.
Chimneys Plus checks the fireplace’s condition and construction, usable cavity, tapered walls, gas-line location and protrusion, chimney and venting, hearth, mantel, mantel legs and nearby sidewalls. Front and backing-plate choices also affect the finished appearance and access. Minimum dimensions are a starting point, not a fit guarantee.
Planning electrical work
Plan for suitable electrical power for the included blower and Night Light. Backup batteries keep the gas fire available during a power interruption but do not power the blower, lighting or all connected features. Chimneys Plus coordinates any required electrical work as part of your fireplace installation, so you do not have to arrange it separately. We’ll check whether an existing connection meets the installation requirements. Adding or relocating power can mean additional work and investment.
Specifications at a glance
- Current U.S. listing: GDIX4N-1 natural gas; approved propane conversion available.
- Maximum fuel input: 40,000 BTU/h natural gas; 36,000 BTU/h propane. Input is fuel consumed, not heat delivered into the room.
- Viewing area: Approximately 518 square inches.
- Controls: SIT Proflame II electronic ignition, remote control and eFIRE Bluetooth app capability.
- Blower: Circulating blower included; household electricity required.
- Venting: approved direct-vent liner system through the existing chimney.
- Minimum fireplace cavity: see Q2 for the model-specific planning dimensions and qualifications.
Explore the Oakville X4 on Napoleon’s official website.
Let’s find the right insert for your fireplace
The Chimneys Plus team includes CSIA- and NFI-certified professionals. Together with our North Carolina general contractor and fuel-piping licenses, these qualifications reflect our commitment to knowledgeable fireplace installation and service.
Whether you prefer this model’s appearance or are still comparing options, we can help with selection and installation, including gas piping, coordination of any required electrical work and required permitting.
Current specifications
- Input range: 16,000 to 40,000 BTU/hr (brochure); output 33,200 BTU/hr max
- Ignition: electronic; eFIRE controller included; eFIRE Bluetooth app control; battery back-up control system
- Media: split oak log set included; optional birch and driftwood log sets
- Viewing: 27 3/4″ W x 18 11/16″ H
- Venting: two 3″ liners (intake and exhaust); minimum chimney flue 6″ round
- Product size: 34 1/8″ W x 24 9/16″ H x 18 3/4″ D (Salsify)
- Warranty: President’s Limited Lifetime
Source: manufacturer product page. Specifications can change with new model years, so we confirm them against the current documents before you buy.
Related products and services
- Napoleon Oakville X3 Gas Insert
- Napoleon Oakville 3 Glass Gas Insert
- Napoleon Oakville 3 Gas Insert
- All fireplace inserts
- Chimney liner installation
- Gas line installation
- GasCheck annual gas fireplace service
- Financing options
Frequently asked questions
What makes the Oakville X4 different from other gas inserts?
The X4 is the larger Oakville option, with a published viewing area of approximately 518 square inches and a dual-burner system. Napoleon describes full modulation of the front and rear burners, which lets you change the fire presentation. It needs a larger fireplace cavity than the Oakville 3-size models, so we check both usable space and the room’s heating needs.
Will the Oakville X4 fit my fireplace?
It may! Napoleon’s model-specific installation manual lists a minimum fireplace opening of 34¼ inches wide × 24⅝ inches high × 17¾ inches deep for the GDIX4-1 configuration shown in the installation manual. These are cavity requirements, not faceplate dimensions. Fronts, backing plates, risers and other installation details still need to be checked against the exact model and current instructions.
The fireplace must also meet the required hearth and combustible clearances. We check the mantel, mantel legs and sidewalls, gas-line location and protrusion, taper and obstructions, vent routing and condition of the existing fireplace. Chimneys Plus can help determine whether this insert is right for your fireplace and identify any adjustments needed for installation.
What style and control options are available for the Napoleon Oakville X4?
The X4 offers compatible log styles, interior panels, faceplates and backing plates. Its remote and eFIRE Bluetooth app provide control of supported functions. Napoleon’s brochure describes full modulation of both the front and rear burners.
Is the Napoleon Oakville X4 a real backup heat source when the power goes out?
Yes! With gas available and fresh batteries in the receiver, the X4 can provide flame and room warmth during a power outage. The included blower and Night Light will not operate without household electricity. We’ll explain the battery and control requirements for your installation. It is useful supplemental heat for the living space, not a guarantee of whole-home heating.
Does the Napoleon Oakville X4 need electricity, and can Chimneys Plus handle that work?
Yes, plan for suitable electrical power for the included blower and Night Light. Backup batteries keep the gas fire available during a power interruption but do not power the blower, lighting or all connected features. Chimneys Plus coordinates any required electrical work as part of your fireplace installation, so you do not have to arrange it separately. We’ll check whether an existing connection meets the installation requirements. Adding or relocating power can mean additional work and investment.
Can Chimneys Plus install a gas line for the Napoleon Oakville X4 if my fireplace doesn’t have one?
Yes! Chimneys Plus is licensed in North Carolina to install gas piping, and we routinely handle this work as part of gas fireplace appliance installations. We can evaluate your existing gas supply, install the piping needed for your new appliance and handle the required permitting.
Is a permit required in North Carolina to install a Napoleon Oakville X4 gas insert?
Permit requirements depend on the work involved and your local inspection department. Installing a new gas line requires permitting. Replacing the fireplace itself also requires permitting, even when the gas line already exists. For a gas insert installed inside an existing fireplace, we’ll confirm the requirements for your project. Whenever a permit is required, Chimneys Plus handles the permitting for you.
Should I choose gas logs or a gas insert such as the Napoleon Oakville X4?
Vented gas logs are often chosen mainly for ambiance. A sealed direct-vent gas insert is worth considering when you want more useful room heat, greater control and backup warmth. It uses outdoor combustion air and vents exhaust outdoors.
Vent-free gas logs can provide a quick burst of warmth, such as taking the chill off a room in the morning. For longer periods of heating, a sealed direct-vent insert is often the better choice. Vent-free logs produce substantial room heat, but release combustion byproducts and moisture into the home. They are intended for supplemental, intermittent use rather than continuous heating. Chimneys Plus recommends short operating periods, generally a couple of hours at a time, with ventilation that may include cracking a window as required by the appliance instructions and room conditions. An open window does not replace those ventilation requirements.
Do I need to choose an insert such as the Napoleon Oakville X4 before contacting Chimneys Plus?
No! You don’t need to know which brand or model you want before reaching out. Tell us what you’d like to improve about your fireplace, whether that’s warmth, ambiance, convenience or backup heat, and we’ll help you compare suitable options. We can guide you through fit, performance and style so you can choose with confidence.
Does the Napoleon Oakville X4 need regular maintenance?
Yes. Regular professional service helps keep the burner, pilot, glass, controls, venting and any blower working as intended. We can help you plan appropriate maintenance and explain routine battery care. Only approved media and components should be used, and the installed glass and protective barrier must remain in place during operation.
What warranty does Napoleon offer for the Oakville X4?
Napoleon provides a President’s Lifetime Limited Warranty, with coverage and limits that vary by component. It is not lifetime coverage for every part or all service costs. We can help you review the warranty for the exact appliance and explain how a service or warranty request is handled.

