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How Flex Venting Helps Complicated Vent Pipe Set Up

How Flex Venting Helps Complicated Vent Pipe Set Up

BY Collin Champagne Sep 05, 2025

Are framing restrictions in your house causing you to look for a creative way to set up vent pipes? If you had the perfect layout already designed but are running into unforeseen problems, maybe you need to consider using flex vent pipe. In this article, we will discuss how flex vent pipe can help you maneuver around framing and give you more options for set up.

How flex venting helps complicated vent pipe set up

Flex venting shines when framing changes force reroutes: instead of re-engineering rigid runs with elbows and offsets, a single flexible section can bend smoothly around joists and beams.

So, you created the design you wanted for the house you're building—then framing shifted and a ceiling joist or beam now blocks the planned vent pipe run for your fireplace or stove. With rigid pipe, you’d recalc lengths and buy offsets; with flex vent, you compress, stretch to length, and route around obstacles with smooth curves.

Cutting flex vent pipe to length

Flex venting comes compressed and stretches to the length you choose. Bend it to the angle you need, replace harsh turns with smooth slopes, then cut to length and attach to the termination or appliance per the manual.

One other great benefit: cost. A straight rigid section is inexpensive, but once you need elbows and offsets to dodge framing, parts add up. Because flex is designed to stretch and bend, one piece often covers the entire path—saving time and money.

For today, that is all we will cover on flex venting. If you have any other questions please feel free to call us at 800.203.1642.

About the Author

Collin Champagne

With over 13 years in the industry, Collin is a National Fireplace Institute (NFI) certified technician and managed content for the eFireplacestore and eCanopy brands. He has achieved the highest NFI certification possible as a Master Hearth Professional and is certified in all three hearth appliance fields: wood, gas, and pellet. With experience with sales and in-field installations, his expertise shines through his technical knowledge and way with words.

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Customer Q&A with Product Specialists

Casey R. from NY asked:
I am restoring a 19th-century manor home in NY with 9 fireplaces. They were converted to gas but are no longer permitted due to fire risk. I'm considering converting them back to wood or pellet stoves as inserts for heating. Would a flex pipe solution work for venting in the 6 existing chimneys, as they will need to be lined? What do you recommend? Also, do you offer a discount, as I plan to do all 6 this year with new inserts and pipe vents?
I am restoring a 19th-century manor home in NY with 9 fireplaces. They were converted to gas but are no longer permitted due to fire risk. I'm considering converting them back to wood or pellet stoves as inserts for heating. Would a flex pipe solution work for venting in the 6 existing chimneys, as they will need to be lined? What do you recommend? Also, do you offer a discount, as I plan to do all 6 this year with new inserts and pipe vents?
Thank you for reaching out! It's wonderful that you're undertaking the restoration of your historic manor home. Regarding venting your fireplaces, using a flexible pipe solution for existing chimneys is indeed possible, but it is contingent upon the specific type of insert you select and the condition of your chimneys. Flex pipe can be utilized when relining an existing, code-approved chimney system. For wood or pellet stove inserts, a stainless steel flexible liner is generally recommended for its durability and safety. DuraFlex Stainless Steel liners, particularly the SW type, are a good option, as they are suitable for both wood and gas-burning units and feature a smooth inner wall for easy cleaning. DuraLiner, an insulated masonry re-liner, is another viable option that can work for wood or pellet inserts. To ensure proper venting and safety, it is crucial to use venting components that are approved by the manufacturer of your chosen insert. Mixing and matching brands of venting components is strongly discouraged, as it can pose a significant safety hazard. We do offer potential discounts for multi-fireplace projects. To provide you with an accurate recommendation and details on any applicable discounts, we require more information about the specific inserts you are considering. Please complete our venting quote form at https://www.efireplacestore.com/virtual-venting-assistant.html. This will enable us to gather the necessary details about your appliances and existing chimney conditions to ensure a safe and efficient venting solution.
Answered by: Tyler M. on Mar 09, 2026

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