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Napoleon's Ascent 35 enhances ambiance in any room with the industry's most realistic, exclusive PHAZER log set and glowing ember bed. The clean face design of the Ascent 35 maximizes optimal viewing to ensure your new fireplace is enjoyed to the fullest. With various accessories and an advanced burner technology, the Ascent 35 is compact, stylish and robust!

Ascent Gas Fireplace Brochure


  • See all available accessories here
  • Millivolt/Standing Pilot or Electronic Ignition
  • Up to 20,000 BTU's
  • Top Vent
  • Natural Gas or Propane
  • Safety Screen Included
  • 20' of wire (for wall switch)
  • 40% Flame/Heat Adjustment
  • Phazer ® Log Set & Embers

Napoleon Ascent B35 Direct Vent Gas Fireplace | B35 | Technical Details


Product Details

Fuel Type: Gas
Vent Type: Direct Vent
Vent Size: 5x8
Ignition Type: Millivolt or Electronic
Installation Type: Zero Clearance
Style: Traditional
Vent Inner Diameter: 5 Inches
Vent Outer Diameter: 8 Inches
Weight: 93 lbs.
Model: Natural Gas (NG) Propane (LP)
Max. (BTU/HR): 20,000 BTU's 20,000 BTU's
Min. (BTU/HR): BTU's BTU's
Napoleon Ascent B35 Direct Vent Gas Fireplace | B35 | Dimensions


Actual Dimensions

Height Width Depth
345/8" 35" 185/16"

Framing Dimensions

Height Width Depth
35" 351/2" 189/16"

Technical Drawings

For more detail please see the Installation Manual

B35 Technical Drawing 1
B35 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 B35. 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 B35. You can find optional accessories on the B35 Accessories page.

4. How is the fireplace vented?

The B35 is typically vented using Napoleon 5x8 venting components, you can find them here. 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.

Have another question? Chat, call or email, we're here to help!

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Warning CA residents-Prop 65