Chimney Liner Size Calculator & Guide

Chimney Liner Size Calculator & Guide

Provided by Rockford Chimney

Installing a stainless steel chimney liner down your chimney is the best and most economical way to revive a deteriorated chimney flue. Doing the work as a D-I-Y homeowner can save hundreds and possibly thousands of dollars. This is no job to cut corners though. It is important you take the time and learn what needs to be done for a successful installation. One of the most important parts of the installation is that you install the correct diameter liner. Under-sizing a chimney liner can cause the appliance to not function properly and produce a poor draft. This could lead to smoke or carbon monoxide into the home.

Rockford Chimney Supply’s Chimney Liner Size Calculator & Guide is a great way for anyone to choose the correct size liner and also the correct type of stainless steel. In a few simple steps, you’ll be able to see your options for chimney liner size and type:

  1. Choose the type of appliance you have
  2. Measure the exhaust collar of the appliance.

For single appliances, this will be all you need to choose to get the correct size and type of liner for your application. Not all stainless steel chimney liners are considered "all" fuel liners. Gas burning should use 316L, 316Ti, or AL29-4C stainless steel chimney liners. Wood burning appliances can use 304L, 316L, or 316Ti stainless steel. Choosing the correct type of liner will ensure a quality, lifetime warrantied liner.

After you know what the correct size liner is for your appliance, you must now examine your chimney flue to ensure that the liner will fit down your chimney. Always take a bright flashlight with you when you are examining the flue. You may notice that there are offsets in the flue or maybe mortar protruding inside the flue that will restrict the liner from being lowered. You do not want to reduce the size of the liner if you find that you are unable to successfully install the liner down your chimney. There are other alternatives such as removal of the clay chimney flue. Tools are available for rental to remove the clay flue at our website. Another cost effective option in this scenario is to choose an oval, rectangle or square chimney liner – we have a guide for that too! (See the Shaped Chimney Liner Conversion Calculator).

There is a liner for every chimney, it just takes a little time and guidance to choose the right one.