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Napoleon DX42 Ascent Deep X Series 42" Direct Vent Gas Fireplace

Napoleon DX42 Ascent Deep X Series 42" Direct Vent Gas Fireplace

Regular price $3,499.00
Regular price Sale price $3,499.00
Sale Sold out
Fuel Type

Decorative Panels

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MIRRO-FLAME Porcelain Reflective Radiant Panels

Newport Standard Brick Panels

Old Town Red Herringbone Brick Panels

Old Town Red Standard Brick Panels

Westminster Grey Herringbone Brick Panels

Westminster Grey Standard Brick Panels

Sandstone Brick Panels

No, Thank You

Decorative Front & Trims

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Finish Trim - Black

Bevelled Trim - Black

Zen Front - Black

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Decorative Media

Mineral Rock Kit
Shore Fire Kit
Beach Fire Kit

Ambient-Glow Embers

Pack of 50

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Ambient-Glow Embers (Pack of 50)

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Thurmalox Black Paint

13oz Case of 12

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Black Paint, Thurmalox 13oz (Case of 12)

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Wall Mount Remote Option

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Wall Mount Remote Control

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Heat Circulation Options

Hot Air Distribution Kit
Hot Air Exhaust Kit
Extension Kit, 5ft Flex Vent
Universal Heat Management System (Side Grill)
Universal Heat Management System (Front Grill)

Power Vent Options

Power Vent Adaptor Kit
Power Vent Adaptor Kit

Conversion Kit

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Natural Gas To Propane

Propane To Natural Gas

No, Thank You

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Building on the popularity of Napoleon’s Ascent Series, the new Ascent Deep fireboxes offer premium depth with all the key features and options that builders and remodelers rely on. The Ascent Deep is available in 2 models, both 22" deep. The D42 and DX42 offers a versatile range of options for design flexibility – with decorative brick panels, fronts and trims. The optional heat management allows for reduction in clearance to combustibles, which reduces distance to sensitive items like TVs, sound equipment and artwork. Making your home layout more comfortable for years of enjoyment.

Competitive Advantages

  • 22" framing depth
  • 31,000 BTU's - Natural Gas
  • 30,000 BTU's - Propane
  • Optional heat management for reduced clearance to combustibles
  • Wide range of optional accessories
  • Will allow Rigid and Flex venting
  • Ceramic Glass 
  • Remote included
  • Blower included
  • Lighting standard
  • Premium safety barrier
  • Oak log set included
  • Battery back-up, USB charging

Dimensions (Actual):

  • Height: 37 7/16"
  • Front Width: 40 1/4"
  • Depth: 22 1/2"

Dimensions (Framing):

  • Height: 42"
  • Front Width: 40 7/8"
  • Depth: 23"



The Ascent™ Deep X 42 Gas Fireplace is a traditionally styled gas fireplace that features a hand made premium split oak log set. This clean-faced fireplace has an extra-deep 22-inch firebox to ensure that every inch of the gorgeous fire can be enjoyed. Fully customize this beautiful fireplace with a multitude of optional fronts, backs, trim kits, and even additional logs and rocks. The optional heat management system reduces clearance to combustibles on installation for greater interior design flexibility. Meaning that you can place your favorite electronics and artwork closer to the fireplace without fear of heat damage. The Ascent™ Deep X 42 Gas Fireplace ensures your favorite space is more comfortable for years to come.



These hyper-realistic logs are meticulously hand made to look just like split oak logs.


From understated to elegant, these decorative fronts enhance your living space.


From traditional to contemporary, these back panels set the scene for your fireplace delight.


Bring a natural element to your fire with a variety of rocks, sand, vermiculite and glass.


NIGHT LIGHT™ illuminates the decorative firebox and logs even when the fireplace is off.


Options & Accessories

Click to see Optional Decorative Panels



Click to see Optional Decorative Front & Trims - Black


Click to see Decorative Media


Napoleon Beach Fire Kit (Recommended with Shore Fire Kit)



Napoleon Shore Fire Kit, Mixture of Rocks, Sand, Vermiculite & Glass (Includes Tray)


Napoleon Mineral Rock Kit (Recommended with Shore Fire Kit)


Click to see Heat Circulation Option

Hot Air Distribution Kit-LHAD

With this Napoleon Hot Air Distribution Kit you can maximize the heating capability of your Napoleon direct vent fireplace.It manages heat produced by the fireplace by expelling it safely and efficiently into the areas of the home that you wish to heat. 

  • Maximizes house-wide heating efficiency
  • For use with a variety of Napoleon fireplaces
  • Includes all assembly items for an easy and secure installation
  • Effectively distributes hot air from unit to heat adjacent rooms


Heat Management System - UHM

Another brilliant way to manage heat from the fireplace, the UHM or Universal Heat Management System doesn’t require blowers to function. It is a simple, quiet system and doesn’t require blowers and additional electricity to function.

How it works:

The UHM System works passively, meaning it is silent, which is great when watching a movie or reading in front of the fire with your loved ones. This passive heat management system move the warm air from the fireplace into the same room as the fireplace through a set of ducts, directing the heat so that it will circulate around the room instead of blowing directly onto the viewer.

Includes 2 each: grill, vent boot, 5′ flexible duct, collar assemblies


Conversion Kit

  • W175-0735: Conversion Kit - Propane to Natural Gas (Electronic Ignition)
  • W175-0734: Conversion Kit - Natural Gas to Propane (Electronic Ignition)


Napoleon Gas Appliance President’s Lifetime Limited Warranty

Refer to product manual for full warranty details. 


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  • Researched and ordered my fireplace from US FIreplace Store. Pricing was a fair value however, the customer service was EXCELLENT! I had an issue with the direct vent venting. I called US Fireplace and the correct items were sent out the next day AND Janessa stayed on top of my return authorization and sent me the permissions and documents I needed to return the incorrect item and no cost to me, including return shipping. Overall, I am a very satisfied customer and my fireplace looks and operates flawlessly. I am glad that I selected US FIreplace to source my direct vent fireplace. Thank you for the great service.


    Monteagle, TN

  • I had placed an order, through Lowe's Home Improvement, for an Electric Firebox: Revillusion RBF42. Ordered 1st part of January. Was told I would have it in 3 weeks. When checking to see is it came in, was told it was delayed to 3/15. Was then told is was delayed until 4/25. Waited until 4/27 to check on it. Was then told it was now delayed until August. This firebox was going in a new Sun Room addition. I could not get my final inspection until the Firebox was installed. I went on line and googled for this same product. US Fireplace Store web site was given to me. This was on a Saturday. I call and reached a very nice man. Explain what I was look for. He checked and told me they had 30 of them in stock. I almost fell out of my chair. I clarified with him the product I was wanting. I ask how soon could I get it. He told me it would ship today. Again, was amazed. It arrived on the following Monday. What a pleasure and a relief working with US Fireplace Store and their employees. Exceed my expectations.

    Thomas W.

    Fort Mill, SC

  • Great prices, quick delivery and fast hassle free services on the issue I encountered. I had purchased an electric fireplace unit that would not fit into the existing fireplace space. With one email I was able to get the wrong fireplace refunded and picked up at my home at no extra cost and the new one I purchased and delivered free of charge. Great company.

    John P.

    Denvers, MA

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