Onyx Direct Vent Gas Fireplace

The Onyx clean face fireplace provides a wide viewable area, and its many customization options ensure that it will suit the decor of almost any room.

Available Sizes:

  • 42"

Quick Look:

VentingDirect Vent
Heating CapacityUp to 1,660 sq. ft.
Max BTUs/hr22,000-34,000
Thermal EfficiencyUp to 80%
Cost to Operate$0.36-$0.92*

* Based on cost/therm. According to the Federal Register Energy Conservation Program for Consumer Products.
Note: A safety barrier is standard on all direct vent inserts. As a result, images shown may differ slightly from actual product.

OPEN VIEW. MODERN STYLING.

The clean face design of this fireplace provides sleek styling with an air of modern sophistication plus a wide viewing area. Complete with a robust, premium log set, the Onyx is a stunning addition to your home.

WIDE VIEWING AREAS

Designed to deliver a beautiful flame picture, all of our fireplaces provide an expansive view of the fire that will delight friends and family.

WARMTH AND COMFORT

No matter which style you choose, you can depend on Majestic fireplaces to deliver ample BTUs to help heat your home for years to come.

EXCLUSIVE SIGNATURE COMMAND® SYSTEM

Enjoy the ultimate in fireplace control, featuring a touch screen remote* and 3-step flame height adjustment. With electronic ignition, this system lights the pilot only when you turn it on to help save energy. And, with automatic battery back-up, you can be assured of fireplace operation even if the power goes out.

SAFETY FIRST

Because our fireplaces were designed to deliver maximum BTUs to provide the best heating solutions for your home, the units will become hot to the touch. Consequently, all Majestic direct vent fireplaces come standard with a certified safety barrier. The screen barrier affixes to your fireplace and has been approved by a third party testing agency to conform to specific standards designed to prevent injury from hot glass.

Accessories that fit your home and lifestyle

  • Signature Command Remote Controls

    These remote controls feature the exclusive Signature Command™ system, which offers full function plus an innovative Smart Mode® that delivers maximum fireplace efficiency.

    Visit Ambient Technologies for more information.

  • Tavern Brown Firebrick

    Customize the interior of your fireplace with this alternative style of decorative firebrick.

  • Olde English Herringbone Firebrick

    Customize the interior of your fireplace with these alternate firebrick kits. The classic look of Olde English Herringbone firebrick creates a stately look in any room. Firebrick is required for installation of the Marquis See-Thru fireplace.

  • Blower Kits

    A variety of fan kits are available to improve the performance of your wood-burning stove. Choose from a thermostat with cord or dual-speed convection fan.

  • Mesh Glass Covers

    Decorative black mesh glass covers are available in 2 sizes.

  • Field Fuel Conversion Kits

    These conversion kits allow you to change the fuel input of your gas appliance at home.

Dimensions in inches. Refer to installation/owner's manual for detailed specifications on installing this product. Hearth & Home Technologies reserves the right to update units periodically. Product installation must adhere strictly to instructions shipped with product.

Model Specifications

MLDV500PSC

Size: 42"
Dimensions: 41 (W) x 50-3/4 (H) x 22-1/4 (D)
Framing Dimensions: 42-1/2 (W) x 50-7/8 (H) x 22-1/4 (D)
Heating Capacity: Up to 1660 sq ft
Max BTU/H: 34,000
Fuel Type: Liquid Propane
Fire Viewing Area: 33" x 27-5/16"
Viewing Style: Front
Ignition System: SCS
Termination: Convertible
Certifications: CSA Design

MLDV500NSC

Size: 42"
Dimensions: 41 (W) x 50-3/4 (H) x 22-1/4 (D)
Framing Dimensions: 42-1/2 (W) x 50-7/8 (H) x 22-1/4 (D)
Heating Capacity: Up to 1550 sq ft
Max BTU/H: 34,000
Fuel Type: Natural Gas
Fire Viewing Area: 33" x 27-5/16"
Viewing Style: Front
Ignition System: SCS
Termination: Convertible
Certifications: CSA Design

Efficiency Chart

Thermal Efficiency: Up to 80%

Heat output will vary depending on the type of fuel used. The flame and ember appearance may vary based on the type of fuel burned and the venting configuration used. Actual product appearance, including flame may differ from image shown. Refer to the owner's manual for complete clearance requirements and specifications. Product specifications and pricing subject to change without notice. For testing and listing information please refer to the owner's/installation manual.

*For select products: Heating capacity to be used as a guide only. See your local dealer for help in determining the product that best suits your heating needs based on climate and home efficiency.
For wood-burning appliances: Actual burn times will vary based on how the appliance is operated, load size, moisture content and type of wood used, and installation.

Technical Specifications

Owner's Manuals