Majestic Products

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. Read More

Model Details

Safety First
Because our inserts 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.
Clean Face Design
Spacious Viewing Area — Onyx fireplaces offer up to 904 square inches of viewable area, so you can enjoy the warmth and glow of your fireplace from any angle.
Design Options
Create a custom look — Onyx fireplaces let you stretch your imagination with a wide variety of accessories. Develop your style with alternate firebrick choices while creating a traditional fireplace look.
Signature Command™ System
Fire control at your fingertips — This exclusive system gives you a full-featured command center for your fireplace. The optional remote offers even more flexibility.
Natural Flame burner system
Authentic fire viewing — The aluminized pan burner produces realistic, randomly dancing flames. Its large ember bed and glowing ceramic fiber logs add to the overall fire viewing experience.
Installation Options
Flexible installation — The Onyx fireplace comes in either Natural Gas or Propane. Its patented design allows you to set it up in either a top- or rear-venting configuration.
Up to 34,000 BTUs
Warmth and comfort — This fireplace delivers a range of BTUs from 22,000 to 34,000, so you'll stay nice and warm while efficiently heating the room to help lower heating costs.

Available Sizes:

Quick Look

Direct Vent
Heating Capacity
Up to 1,660 sq. ft.
Thermal Efficiency
Up to 80%
Cost to Operate

* 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.

Guides & Literature

Finishing Options

  • Signature Command™ Remote Controls Signature Command™ Remote Controls RMSC, TSMSC, TSFSC, TSTSC, SCSWEK, SCSACMThese 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 Tavern Brown Firebrick FBMLDV500TBCustomize the interior of your fireplace with optional firebrick styles. The warmth of Tavern Brown firebrick adds a cozy accent to your room.
  • Olde English Herringbone Firebrick Olde English Herringbone Firebrick FBMLDV500OECustomize the interior of your fireplace with optional firebrick styles. The classic look of Olde English Herringbone firebrick creates a stately look in any room.
  • Blower Kits Blower Kits BLOTBLDV, BLOTBLDVSCChoose either a 160 CFM, variable thermostat controlled fan or a 3-speed, 160 CFM version (Requires SCSACM & TSFSC remote modules).
  • Mesh Glass Cover Mesh Glass Cover MLDV500SDDecorative black mesh glass cover for Onyx fireplaces.
  • Field Fuel Conversion Kits Field Fuel Conversion Kits Natural Gas to Propane: ML500CKPS. Propane to Natural Gas: ML500CKNS.These conversion kits allow you to change the fuel input of your gas appliance at home.

Onyx Model Line-Up

Unique features by model number

Model Number MLDV500PSC MLDV500NSC
Heating Capacity Up to 1660 Up to 1550
Max BTU/H (Natural Gas) N/A 34,000
Max BTU/H (LP) 34,000 N/A
Cost to Operate $0.92 $0.36
Fuel Type Liquid Propane Natural Gas

Common features for this family

Size 42
Viewing Style Front
  • 41 (W)
  • 50-3/4 (H)
  • 22-1/4 (D)
Framing Dimensions
  • 42-1/2 (W)
  • 50-7/8 (H)
  • 22-1/4 (D)
Ignition System SCS
Termination Convertible
Certifications CSA Design
Fire Viewing Area 33" x 27-5/16"
Spec Sheets
& Manuals