Installation Guide

5
Numbers. The UL Catalog Numbers will be
referred to within the instructions, as an aid
to assembly, however for ordering, use the
stock numbers shown in the Chimney Products
Catalog. Practice good workmanship. Sloppy
work could jeopardize your chimney’s safety.
Keep electrical wiring and insulation away from
all chimneys and stovepipes.
CHIMNEY DIAMETER
Follow the appliance manufacturer’s
instructions to determine chimney diameter
and clearances between combustible materials
and your heating appliance. Never choose a
chimney with an inside diameter smaller than
the appliance ue gas outlet. To calculate the
chimney’s outside diameter, add 4 inches to
the inside diameter.
CHIMNEY HEIGHT
The National Fire Protection Association
Standard #211 states: “Chimneys shall extend
at least three feet above the highest point
where it passes through the roof of a building,
and at least two feet higher than any portion
of a building within ten feet.” (Figure 1).
DuraPlus may be installed up to 35 feet high.
If a chimney is installed higher than 35 feet, a
supporting Elbow Strap must be placed every
8 feet. If the chimney extends more than 4
feet above the roof, an Extended Roof Bracket
must be used. Subtract 1-1/2 inches from
each Chimney Section’s length to calculate
installed length.
CHIMNEY PLACEMENT
When deciding the location of your chimney,
try to minimize the alteration and reframing of
structural components of the building.
TABLE 1
DURAPLUS (SDP) PARTS WITH UL CATALOG NUMBERS
UL Cat # Part UL Cat # Part
SDP-P Chimney Sections SDP-TS Tee Support Bracket
SDP-T Tee SDP-IS Insulation Shield
SDP-F Flashing SDP-FRS Firestop Radiation Shield
SDP-TF Flat Roof Flashing SDP-SC Storm Collar
SDP-S Flat Ceiling Support Box SDP-WS Wall Strap
SDP-RS Round Ceiling Support Box SDP-ES Elbow Strap
SDP-SB Square Ceiling Support Box SDP-RSA Extended Roof Bracket
SDP-WT Wall Thimble SDP-AP Anchor Plate
SDP-C Chimney Cap
Figure 1
2 FEET MIN. ABOVE HIGHEST
POINT OF ROOF WITHIN
10 FEET
3 FEET MIN.
FROM ROOF
PENETRATION
10 FEET
MINIMUM CHIMNEY HEIGHT