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Napoleon Oakville GDI3 Gas Fireplace Insert | GDI3N |

Original price $2,149.00 - Original price $2,504.00
Original price
$2,149.00 - $2,504.00
Current price $2,149.00

New Item--Use the options above for fuel type and interior panels. The backerplates and faceplates are on the Oakville 3 Accessory page. Please call if you would like assistance.

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The Napoleon Oakville 3 Gas Fireplace Insert offers many standard features including a premium SPLIT OAK log set and "H" style burner that produces a full firebox of flames! The clean face design, flush finish accessories and endless design opportunities make this perfect for smaller living spaces. The Oakville 3 is great for homeowners who want the cost saving benefits of Zone Heating (heating the room you use the most) plus the benefit of replacing an old drafty masonry fireplace with an efficient heating source.

Napoleon Oakville GDI3 Brochure


  • See all available accessories here
  • For use within a masonry fireplace
  • High Performance "H" Style Burner Provides Complete Firebox Width Flame Display
  • Up to 24,500 BTU's
  • Full view design with a massive 340 sq. in. viewing area
  • Simple and robust millivolt control system
  • Premium clean face safety barrier maximizes the viewing area
  • Directional baffles increase airflow for maximum blower efficiency
  • Wide range of media kits, brick panels and porcelain panels available
  • Clean contemporary faceplates and backerplates available
  • Heat circulating blower available
  • Optional Faceplates 2.5" And 5" Widths In 3-Sided Or 4-Sided Configurations
Napoleon Oakville GDI3 Gas Fireplace Insert | GDI3N | Technical Details


Product Details

Fuel Type: Gas
Vent Type: Direct Vent
Vent Size: 3x3
Ignition Type: Millivolt
Installation Type: Insert
Style: Traditional
Vent Inner Diameter: 3 Inches
Vent Outer Diameter: 3 Inches
Weight: 100 lbs.
Model: Natural Gas (NG) Propane (LP)
Max. (BTU/HR): 24,500 BTU's 24,500 BTU's
Min. (BTU/HR): 13,475 BTU's 13,475 BTU's
Napoleon Oakville GDI3 Gas Fireplace Insert | GDI3N | Dimensions


Actual Dimensions

Height Width Depth
2015/16" 285/8" 185/16"

Technical Drawings

For more detail please see the Installation Manual

GDI3N Technical Drawing 1
GDI3N Technical Drawing 2



Why am I required to purchase a decorative panel with the fireplace at additional cost?

The fireplace is designed for use with this item. Without this item, your fireplace would not function correctly and would look incomplete. The item is an additional cost to allow you to choose which look you like best.

How will the fireplace be delivered? Will the delivery driver bring it into my house?

All fireplaces are delivered via freight (tractor trailer truck) to the specified street address you provide us, we do provide free lift gate service with all freight deliveries. The delivery driver is only responsible for unloading the items from the truck, not to move them anywhere. For more information on the delivery process visit our FAQ page.

How is this fireplace vented?

The Oakville 3 gas fireplace insert uses a 3" exhaust and a 3" intake. Since an insert is installed in a masonry fireplace, the 3" aluminum liners are typically dropped down the chimney. We recommend Napoleon's insert venting components, GDI-223 termination with a liner kit, GDI-2320KT, GDI-2325KT or GDI-2335KT, depending on the height of the chimney. Of course, if you need any assistance in determining which type of venting is best for your situation, give us a call (844)635-5499.

What's the difference between an insert and a fireplace?

In the hearth industry, we refer to an insert as a fireplace that is being installed within an existing masonry fireplace. These units are designed to get hot, therefore they wouldn't be safe installed in a wall opening. A direct vent fireplace, or zero clearance fireplace has additional insulation and heat protection to allow it to be installed close to combustible materials such as wood, they are generally larger in size that inserts.

How do I know if my existing fireplace is big enough?

The minimum firebox opening needed is shown in the images above (21 1/2"H x 29"W x 14-3/8"D (Add 4" depth for optional blower)). When choosing your surround size we generally aim for at least a half inch of overlap on the sides and top.

Where are the accessories for this fireplace?

You can find all of the available options on the accessories page.

Have a different question? Give us a call, email or chat.

Questions & Answers

Ask a Question
  • can i operate gas insert fireplace below the “ turn down btu s level?

    The minimum output on this insert is 13,475 BTU's. Turning the burner down all the way will operate the insert at that output.

    Thanks for the question!

  • How do you turn on the fireplace during a power outage?

    The GDI3N gas fireplace is a millivolt ignition system.  This means that the pilot light generates the power required to operate the gas valve.  There will be no change in operation during a power outage except that the blower would not function.  Whether the fireplace is connected to a wall switch, remote or thermostat, it will turn on as usual.  Thanks for your question!

Warning CA residents-Prop 65