Oval Chimney Liner Conversion Chart, Oval Liner Sizing Chart

This chart is designed to assist you in selecting an oval shaped chimney liner. The key when calculating the measurement of a shaped liner is to match as closely as possible the area in square inches of a recommended round liner. Complete instructions are included below the chart. You can also try our Liner Shape Calculator.

Please give us a call at 1-866-708-2446 to confirm your dimensions before placing your order.

Oval Shaped Chimney Liner Conversion Chart

Original (Round) Liner Dimensions
Diameter 5" 5.5" 6" 6.5" 7" 7.5" 8" 9" 10" 11" 12" 14" 16"
IN² 20 23.75 28 33.2 38 44.2 50 64 79 95 113 153.9 201
Converted (Oval) Liner Dimensions
Minor
Outside
Dimension

Major Outside Dimension
4" 6" 7.15" 7.7" 8.7" 9.4" 10.35" 11"            
IN² 16 19.27 20.24 23.68 25.68 28.38 30.23            
4.5" 5.7" 6.8" 7.4" 8.4" 9.1" 10" 10.8" 12.4"          
IN² 17.22 20.27 22.72 25.95 28.21 31.19 33.71 38.89          
5"   6.5" 7" 8.15" 8.75" 9.7" 10.4" 12.1" 13.9"        
IN²   22.23 24.05 28.22 30.4 33.85 36.39 42.56 49.1        
5.5"     6.75" 7.85" 8.35" 9.4" 10.1" 11.7" 13.45" 15"      
IN²     25.64 30.07 32.08 36.3 39.12 45.56 52.6 58.83      
6"       7.65" 8.05" 9" 9.75" 11.35" 13.1" 14.55" 16"    
IN²       32.12 33.88 38.08 41.39 48.46 56.18 62.59 68.99    
6.5"           8.8" 9.4" 11" 12.6" 14.05" 15.6"    
IN²           40.5 43.39 51.08 58.77 65.75 73.2    
7"           8.4" 9.05" 10.65" 12.2" 13.65" 15.25"    
IN²           41.73 45.11 53.43 61.49 69.03 77.35    
7.5"             8.65" 10.35" 11.85" 13.3" 14.75"    
IN²             46.28 55.79 64.18 72.29 80.4    
8"               10" 11.5" 13" 14.35"    
IN²               57.61 66.59 73.17 81.25    
8.5"               9.8" 11.25" 12.6" 13.95"    
IN²               60.11 69.36 77.97 86.58    
9"                 11" 12.3" 13.55"    
IN²                 71.43 80.73 92.22    
9.5"                 10.08" 12.1" 13.25" 17.62"  
IN²                 69.51 83.98 92.22 131.4  
10"                   11.95" 13" 17.25"  
IN²                   87.45 95.38 135.5  
10.5"     Oval Liner Size Chart - Call (866)-708-2446) With Any Questions     11.7" 12.85" 17"  
IN²         90.01 99.15 140.12  
11"                     12.77" 16.65"  
IN²                     103.38 143.77  
11.5"                     12.5" 16.4"  
IN²                     105.87 148.15  
12"                       16.2"  
IN²                       152.7  
12.5"                          
IN²                          
13"                          
IN²                          
13.5"                          
IN²                          
14"                         17.35"
IN²                         181.55
14.5"                         17"
IN²                         184.34
15"                         16.25"
IN²                         182.25

 

How to use the Shaped Liner Conversion Chart

Step 1: Determine what diameter of round liner is recommended for your stove, fireplace, or other appliance. You should also know the inside dimensions of your flue.

Step 2: In the top (red) section of the chart, locate the number that represents the round liner diameter you need. Then look below it for the red number that indicates the area in square inches. Example: An 8" round liner has 50 square inches of area.

Step 3: Look at the oval (blue) section of the chart. The numbers of the left side of the chart indicate possible Minor Outside Dimensions; the numbers on the right are possible Major Outside Dimensions. The red numbers indicate the area in square inches for each Major OD x Minor OD combination.

Start by eliminating all the black numbers in the left column (Minor ODs) that are equal to or greater than the Minor Inside Dimension of your flue. Look for the red number (square inches) that is closest to the area of the round liner you found in Step 1. Make sure the number you select is within 2 square inches of the round liner area. Eliminate all the Major ODs that are equal to or greater than the Major Inside Dimension of your flue.

Step 4: Once you have found your match in square inches, the black number above it with be the Major OD of your oval liner. Follow that row horizontally to locate the Minor OD on the left side of the chart.

You have now found the two numbers that will be used for the dimensions of your shaped liner! Please give us a call at 1-866-708-2446 to confirm your dimensions before placing your order.

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