Napoleon GD8TVK 5"x8" Direct Vent Fireplace Venting Component Top Vent Kit


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Through-Wall Top Vent Kit includes: 1-5ft flex vent (5" inner and 8" outer), 1-GD422 wall terminal/vinyl siding shield.

Can be used for a fireplace which is being placed on an exterior wall with a horizontal termination. Check installation guidelines for minimum rise before bending the vent pipe.

Recommended with this kit is the 5x8 wall firestop.

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Product Summary

Flexible Venting - Simply Perfect

Cost efficient, convenient & durable.

Freedom Flex Venting systems are top of the line when it comes to materials, cost efficiency and convenience with proven durability for 25 years. Made with two layers of rolled aluminum, our flexible vent pipes pass each and every certification test, exceeding industry standards. Unlike aluminized steel and galvalume, our vent pipes are manufactured of 100% aluminum material and made to withstand the corrosive condensates from combustion.

Freedom Flex Features

  • Cost Effective. Not only does Freedom Flex cost up to 80% less than competitors’ rigid vent, but an installation with Freedom Flex takes less than half the time!
  • Fewer pieces and connections needed. Leading to less time and labor and less likely to leak.
  • Simplified installation because of expanding lengths. No wasted time measuring each section and up and down ladders or finding you forgot an elbow joint and delaying your install.
  • Adaptability for different applications or a change in the position of the fireplace. Often the fireplace position may be “tweaked” for design purposes, which could require new parts and an offset in rigid venting as well as the need to disconnect and reconnect. With Freedom Flex, just bend or stretch to the new angle. Simple!
  • Less Waste. Used effectively, sections of Freedom Flex pipe that are cut off can be used in other fireplace applications offering additional cost savings.
  • Convenience. Freedom Flex is light weight and comes in 5' and 10' vent lengths that are compressed down to 20" and 40" lengths respectively to help not only with warehouse storage and work truck space, but also with the ease of handling.

Testing Standards

Our Freedom Flexible aluminum vent is produced from type 3003 aluminum alloy. Like rigid vent, it must meet the test requirements that are contained in the harmonized safety standards for vented gas fireplaces, ANSI Z21.88/ CSA 2.33 and ANSI Z21.50/ CSA 2.22. Beyond that, flexible vent must meet specific test requirements that are contained in UL 1777 Chimney Liners and ULC-S635 Standard for Lining Systems for Existing Masonry or Factory-Built Chimneys and Vents. In short, Freedom Flex not only meets the same ANSI standards as other direct vent rigid pipe but also meets additional standards!


Ask a Question
  • Hi I am installing a new to me gas fireplace heatilator gc300e. It has a 5x8 dvp connections. I am looking for suggestions on a horizontal termination kit, but it will be in a windy area. I was looking at the Napoleon GD8TVK 5"x8" Direct Vent Fireplace Venting Component Top Vent Kit and wondering if it would be good for a windy location? If not do you have any recommendations? The vent comes out the top of the fireplace and up about 5 ft then turn 90 degrees and go horizontal and 3 ft to the termination. I was thinking of using the Napoleon flex venting for this. Would this be good or do I have to go with the rigid pipe. Could I get prices as well. Thanks Ryan

    The manufacturer decides which venting brands are approved for use with their fireplaces.  For your Heatilator you will only be allowed to use the DVP venting components listed.  I can send you a quote with the appropriate components, according to your measurements, and allow for some flexibility with slip sections of venting.  When measuring for rigid pipe, it's easiest to do so using the center of the vent, not to the top or bottom.  In order to send you a quote, I'll need your email, just get in touch at  Thanks for your question!

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