How to Size Chimney Liners


A chimney liner is important to have properly fitted, not only to help the chimney run more efficiently, but also to prevent smoke from coming into the house. Liners that are too big reduce the amount of heat generated by the fireplace, leaving your home improperly warmed during cold months. For someone who has never measured a chimney liner, it may be tricky to know what to look for. A size liner guide provided by Woodland Direct ensures a proper fit for any style chimney.

Things You'll Need

  • Measuring tape
  • Visit Woodland Direct for a size liner guide. You will be able to choose from a variety of heating systems like wood, gas or coal to determine the best fitting liner for your chimney.

  • Select the fuel type by pressing one of the appropriate icons. For example, if you want to know what size liner you need for a wood fireplace, select the wood icon. Select the type of unit you have---for this example, choose fireplace.

  • Input required measurements to determine what size liner you need. Measure the width and length of the fireplace box only, not the mantle. Once you input the measurements, calculate to determine the size you need.

  • Look through the size recommendations based on chimney liner style including round, oval, square or rectangle. Each of the liners is provided based on your specific measurements.

  • Visit a hardware store to purchase your recommended size liner, or order it online.

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  • Photo Credit chimney stack image by hazel proudlove from
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