RADIATION SHIELD (RRS)
The Radiation Shield is used to shield the chimney when passing through a combustible floor or roof. The See
TABLE 3 for the correct rough opening size.
1. Install the length of chimney that passes through the floor or roof.
2. From below place the radiation shield in the floor or roof.
3. Attach it to the floor or roof using # 8 X 2" screws through each pre-punched hole.
RAIN CAP (RRC & RDRC)
All RIS chimneys must be terminated using a rain cap. The RIS design leaves the insulation exposed at the ends
and without a rain cap moisture can enter the chimney.
1. Fit the cap on to the top chimney length.
2. Screw the stainless steel metal screws supplied with the cap through the pre-punched holes in the bottom of
the cap and into the lower length. Be sure to use a metal screw in each pre-punched hole.
After market chimney top devices
It is a common practice for chimneys to be installed with custom made rain caps and terminations of various kinds.
This includes such after market devices as Exhausto chimney top fans and chimney top dampers. The following
factors must be considered when installing a chimney termination other that our factory-built and listed chimney
caps.
When installing a chimney top device of any kind you must deduct the length of chimney equivalent to the weight
of the device from the maximum rated capacity. If additional support is required we recommend the use of a roof
support as close to the top of the chimney as possible.
We recommend the use of a roof brace or guy wires to provide lateral support when an alternate chimney top is
installed. Additional lateral support is not required when the chimney is installed in a chase if the chimney does
not project more than 18 inches above the chase top. The use of a roof support is recommended for chase instal-
lations.
Model RIS has exposed insulation at the ends. In most installations RIS is terminated with our factory built cap
which covers the end of the insulation. When using any other type of cap you must use a factory supplied closure
ring (part #RCB) to cover the top of the chimney.
RIS Owner's Manual
ICC Chimney
15
