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Replacement glass for direct vent fireplaces may not be easy to come by from the original manufacturer. Fortunately, Fast Replacement Glass is your custom glass source for these applications!

Direct vent applications can be installed virtually anywhere in your home! They utilize a sealed 2-pipe ventilation system. Cool air from the outside is pulled in through the outer pipe for combustion. The air is heated and then radiated into your home via the sealed glass front. Finally, the inner pipe routes 100% of the exhaust fumes back outside, making this an ideal concept for those with asthma and allergies! The pipe can be installed vertically through the roof, or horizontally through a single wall. Capable of burning fuel at a 70% efficiency rate, your home will experience greater comfort with less natural gas or propane, generating a nice savings for you!

When it comes to replacement glass, you want the ultimate in strength and quality. You also want to make sure you are getting the correct glass window for your direct vent fireplace!


  • Regular Direct Vent Fireplaces
    These low maintenance heating options offer the realism of a wood-burning fire without all the upkeep! Regular direct vent fireplaces operate with a lower BTU output and are capable of providing heat to the immediate area of the room in which they reside. Regular direct vent fireplaces must be operated with a TEMPERED glass front.


  • AFUE-Rated Direct Vent Fireplaces
    The Annual Fuel Utilization Efficiency rating is used with direct vent fireplaces that cycle on an off to maintain a consistent temperature. They typically have a secondary heat exchanger and circulating fans to deliver warmth to your home. These particular applications are capable of delivering more BTUs than a regular direct vent model; therefore, they are capable of providing heat to multiple rooms in your home. AFUE-rated direct vent fireplaces require a CERAMIC glass front.


Our tempered glass is up to 7 times stronger than regular glass, ensuring a durable and safe product! The thermal shock rating of 400°F makes it an excellent replacement for the glass door on your regular direct vent fireplace. Our tempered glass is available in 3/16", 1/8", or 1/4" thickness, and clear, gray, or bronze tints. All of our glass comes with a seamed edge finish, which has been lightly sanded to ensure no sharp areas remain.

The thermal shock rating of 1380°F on our ceramic glass makes it appropriate for AFUE-rated applications. We offer our 3/16" thick, amber tinted pyroceram in a many shapes and sizes. Our glass has a seamed edge finish, which has been lightly sanded to smooth off any sharp areas.

Some important things to remember:

  • Glass expands when heated! Please request your cut of glass to be at least 1/8" shy of the mounting surface. This measurement will allow for a safe thermal expansion. We cannot be held responsible for breaks due to improper calculations!
  • Metal screws and mounting hardware also expand when exposed to high temperatures! To avoid damage to your glass when your appliance is in use, please do not over-tighten hardware. We cannot be held responsible for breaks due to hardware that has been secured too firmly.
  • Please submit any additional information, questions, or concerns you may have about your online glass request to the "Notes" box on this product page.


What if I need a specific shape for my replacement glass?

Shapes are not contiguous with tempered glass, as it cannot be cut with arches, radius corners, and the like. If your existing door glass resembles any of the following:

  • arched top
  • round or curved edge
  • non-square angles
  • notch cut into the side(s)
  • front beveled edges
  • grooves or indents is highly likely that you have a fireplace insert or a wood, pellet, or coal stove. If you require more assistance, our team of experts would be happy to help you! 

For all of your tempered glass needs:

We recommend a flat fiberglass gasket and high temperature cement for most installs. However, if your fireplace requires a rope or tadpole gasket, we have these options available, as well.

We can edge polish for you! Offering Flat or Pencil polishing at $0.50 per linear inch.

Need a custom size? We'd be happy to oblige! Simply call us at 1-888-986-1535 for more information! 

Fast Replacement Glass specializes in custom cut glass to fit your application, no matter what the brand and model! In no time, you'll be able to enjoy the beauty of the fire burning in the hearth, along with the comfort of knowing that your new tempered glass meets all safety standards.


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