RIS Minimum Rough Opening Dimensions
Diameter
6
7
8
10
12
14
16
18
20
22
24
Hole
Size
(in.)
Combustible Wall,
Floor or Roof
12
13
14
16
18
20
22
24
26
28
30
Non-Combustible
Wall,Floor or Roof
9
10
11
13
15
17
19
21
23
25
27
FLOOR or BASE SUPPORT (BS)
1. Cut and frame the opening to the dimensions
required in table 3 above.
2. Attach the support to the floor using one #10 X 2"
screw through each hole in the support.
3. Place the support collar around the chimney
length at the desired height. Tighten the ring and
then screw the Stainless Steel metal screws (sup-
plied with support) through the collar and into the
chimney casing. Be sure to use a metal screw in
each pre-punched hole.
4. Place the chimney and collar in the support.
5. Continue installing chimney lengths as required.
WALL SUPPORT
This support may be attached to a combustible or non-combustible wall. It may be used to support an Insulated
Tee or may be used as a re-support fastened to a chimney length.
1. Attach the main support plate to the wall using
at least a #10 X 3" screw through each hole in
the plate. Make sure the support is horizontal,
then attach the angle arms to the wall above
the support.
2. Place the support collar around the chimney
length at the desired height. Tighten the ring
and then screw the Stainless Steel metal
screws (supplied with support) through the
collar and into the chimney casing. Be sure to
use as many metal screws as there are pre-
punched holes in the chimney lengths.
3. Place the chimney and collar in the support.
4. Continue installing chimney lengths as
required.
If possible install an interior chimney as it will provide better performance than an exterior chimney. In area with
continuous temperatures below 18 C (0°F) the use of an exterior chimney may result in operating problems such
as poor draft, excessive condensation of combustion products and rapid accumulation of creosote when
connected to a wood burning appliance. If you do install an exterior chimney, we recommend that you enclose it
using an insulated enclosure.
RIS Owner's Manual
ICC Chimney
11
