Sizing Guide

Find the Right Chimney Product for Your Fireplace

Not sure which chimney product you need? You’re not alone. Every fireplace and chimney system is different, and choosing the wrong product can lead to poor performance or unnecessary expenses.

Our quick sizing guide helps identify what you have inside your chimney so you can find the correct cap, damper, or accessory in just a few steps.

How to Inspect Your Chimney

Before using the guide:

• Make sure the fireplace is completely cool.
• Use a flashlight to look up into the flue.
• If needed, use your phone’s camera to get a better view.
• Don’t climb onto the roof—everything in this guide can be identified from inside the fireplace.