TLCEK — Insulated 15- and 30-degree Elbow Kits

Chimney Offset Charts

It may be necessary to offset the chimney in order to clear a joist or an obstacle. The two (2) charts on the following page will assist you in selecting the proper combination of elbow angle and chimney length(s) that will provide the necessary degree of offset within an available height.

1. Select the column with the proper chimney diameter of your system.
2. Determine the distance of the offset required by dropping a plumb line for an accurate measurement. The offset is measured at the chimney centerline, as per the "A" Offset measurement in the diagram below.
3. On the chart, find the predetermined distance (under the "A" column) required for the 15° elbow. For greater offset, use the 30° offset chart.
4. After finding the offset, look at the "b" (height) measurement in the chart to find the specified height. The appropriate "chimney lengths" required in between elbows is found in the left- hand side column of each chart.

NOTE:

• Model TLC chimneys are limited to offsets not exceeding 30°. Combining offsets for greater angle is not permitted.
• One pair of (two) elbows may be used for interior installation only.
• Never install an elbow in a joist area. Chimney sections must pass vertically through framed joist areas.
• Locking Bands must be used at all chimney joints.
• Each elbow resupport will support 15 feet of chimney.
• The maximum length of chimney allowed between elbows is 6 feet.