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Napoleon Ascent B46 Direct Vent Gas Fireplace | B46 |

Original price $2,749.00 - Original price $3,594.00
Original price
$2,749.00 - $3,594.00
Current price $2,749.00

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Napoleon's Ascent 46 is now the largest single view fireplace in the Ascent Series and is offered as a 4" x 7" top and rear vent model. Offering a multitude of options with decorative fronts, trim kits, decorative brick panels and MIRRO-FLAME Reflective Radiant Panels, the Ascent 46 can be designed to your personal taste and match any home decor. An approved safety barrier comes standard on the Ascent 46.

Ascent Gas Fireplace Brochure


  • See all available accessories here
  • Exclusive PHAZER log set and glowing ember bed are the most realistic in the industry
  • Natural Gas or Propane with included conversion kit
  • Back-up control system ensures reliable use, even during power failures
  • Millivolt or Electronic ignition systems available
  • Flex connector complete with shut off (Electronic ignition system only)
  • Optional remote control
  • Optional blower kit
  • Pre-wired for wall switch

Napoleon Ascent B46 Direct Vent Gas Fireplace | B46 | Technical Details


Product Details

Fuel Type: Gas
Vent Type: Direct Vent
Vent Size: 4x7
Ignition Type: Millivolt or Electronic
Installation Type: Zero Clearance
Style: Traditional
Vent Inner Diameter: 4 Inches
Vent Outer Diameter: 7 Inches
Weight: 123 lbs.
Model: Natural Gas (NG) Propane (LP)
Max. (BTU/HR): 22,000 BTU's 22,000 BTU's
Min. (BTU/HR): BTU's BTU's
Napoleon Ascent B46 Direct Vent Gas Fireplace | B46 | Dimensions


Actual Dimensions

Height Width Depth
345/8" 46" 185/16"

Framing Dimensions

Height Width Depth
35" 461/2" 189/16"

Technical Drawings

For more detail please see the Installation Manual

B46 Technical Drawing 1
B46 Technical Drawing 2


1. Do I need to purchase a panel or trim kit with the fireplace?

No, these are optional accessories to enhance the look of the B46. The fireplace can be purchased without adding any additional features, although most customers prefer to add a panel and trim kit to complete the look and feel of the installation.

2. 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.

3. The picture shows logs, are those included?

Yes, the logs are included with the B46. You can find other optional accessories on the B46 Accessories Page.

4. How is the fireplace vented?

The B46 is typically vented using Napoleon 4x7 venting components, you can find them here. The most simple venting scenario uses the 4x7 Rear Vent Kit or the 4x7 Top Vent Kit (for use when installing on an exterior wall). If you need help designing the venting system let us know with an email or a phone call and we can assemble a custom solution for your situation. Head over to our Learning Center for how-to videos about the flex vent system and more.

5. Have another question? Ask below or chat, call or email.

Questions & Answers

Ask a Question
  • Can I retro fit with a non venting log set that lets me close the updraft chimney vent during operation. I have a model Mnh6018 fireplace.

    I can't find the model fireplace you're referring to, but in general, if you can fit a vent free log set into a wood burning fireplace, you can keep the damper closed.  Vent free appliances are restricte in some states and cities.  Thanks for your question!

  • Napoleon B-46 What are the dimensions of the glass? What is the efficiency precent?

    The glass dimensions are 23 11/16"h x 41 11/16"w.  The EnerGuide efficiency is rated at 73.3%.  Thanks for your question!

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