Osburn Horizon OB04010, Installation And Operation Manual

Page: 57 / 80

HORIZON – Installation and Operation Manual 57
DuraVent
• Ventilated roof flashing.
• Rafter protector at the roof level is
chimney is enclosed at the attic level.
2" Solid Pack : Dura Plus HTC
AC Triple Wall : Dura Plus
American Metal
• Chimney cannot be enclosed at the
attic level.
AC Triple wall HS,
AC Triple wall HSS
*You can get a kit of four (4) rafter protector (AC03510) from
your dealer. Each rafter is made of 22GA galvanized steel
(10.44”W x 5.126”H).
7.7 Angled wall radiation shield
When passing through a combustible wall with the chimney at a 30
°
or 45 ° angle (30 ° or 45 ° in Canada and 30 ° only in the USA), an angled
firestop or wall radiation shield provided by the chimney
manufacturer
must be installed.
Only one is
required. Follow
the chimney manufacturer’s installation instructions.
In cold climate locations, it is recommended that you use the
insulated wall radiation shield since it will maintain the home’s
thermal barrier.
7.8 Chimney support installation
7.8.1 Universal roof support
This support has three possible uses:
1.
It must be used on a roof to support the chimney.
2. It may be used on a floor, ceiling or roof above an offset to support the chimney above the offset.
3. It may be used on a floor, ceiling or roof as a supplementary support.
For roof support installation, refer to the instructions provided with the support by the chimney
manufacturer. Many manufacturers will provide the maximum height of chimney that can be supported by
the support. Make sure you respect those parameters.
7.8.2 Universal offset support
This support is used to support the chimney above an offset. When the chimney offset is used to pass
through a wall, this support may be used on the wall to support the chimney. For offset support installation,
refer to the instructions provided with the support by the chimney manufacturer. Many manufacturers will
provide the maximum height of chimney that can be supported by the support. Make sure you respect
those parameters.
A INSULATED WALL RADIATION SHIELD
B GYPROCK
C
INSULATED WALL
10.44”
5.126”
1.530”
.512”