Vent Run Support Requirements - Lennox Hearth Products Rhapsody RHAP42N Installation Instructions Manual

LENNOX HEARTH PRODUCTS • RHAPSODY™ LINEAR DIRECT-VENT GAS FIREPLACES (MODELS RHAP42N & RHAP54N) • INSTALLATION INSTRUCTIONS
VENTINg INSTALLATION
(CONTINUEd)
VENT RUN SUPPORT
REqUIREMENTS
Supporting Vertical Vent Runs
Note: Proper venting support is very
important. NEVER use the fireplace to
support the weight of the venting.
Support the vertical portion of the venting
system every 8 feet (2.4 m) above the fire-
place vent outlet (see Figure 21).
Use Support Straps (cat. no. SV4.5SU;
see "Accessory" section in this manual) or
conventional plumber's tape (not provided).
Secure the plumber's tape to the framing
members with nails or screws. Loop the
plumber's tape around the vent, securing the
ends of the tape to the framing. Use #6 x
1/2" sheet metal screws to secure the support
straps to the vent pipe.
Blocking
Support Straps
(e.g., plumber's tape;
not provided)
Support vertical venting
every 8 feet (2.4 m) above
appliance vent outlet.
See "MINIMUM
CLEARANCES TO
COMBUSTIBLES"
in this manual.
Figure 21: Vertical Venting Support
Supporting Horizontal Vent Runs
See Figure 22. Install support straps every
5 ft (1.524 m) along horizontal/inclined
vent runs using Use Support Straps (cat. no.
SV4.5SU; see "Accessory" section in this
manual) or conventional plumber's tape (not
provided).
Horizontal
Support
Building
Brackets
Support
framing
90° Elbow

Vertical
Ceiling
firestop/
Vertical
Spacer
Rise
Support vertical venting every
8 ft (2.4 m) above fireplace vent
outlet (see "Supporting Vertical
Vent Runs" on this page).
 RHAP42N = 12" straight vent section required before 90° elbow
RHAP54N = 6" straight vent section required before 90° elbow
Figure 22: Typical Horizontal Termination System
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTICE:
horizontal runs on a steady, (i.e., no
"dips"), slightly positive incline of
approximately 1/4 inch rise-per-foot (20
millimeters rise-per-meter) horizontal,
in a direction away from the fireplace.
(Slightly smaller rise-per-foot run ratios
are acceptable.) Use a carpenter's level
to measure from a constant surface, and
adjust support straps as necessary.
Horizontal/Inclined Run
Straight Vent
Sections
Place horizontal support brackets
every 5 ft (1.524 m).
u

fireplace
It is important to install
Horizontal
firestop/
Spacer
u
Horizontal
Termination
Exterior
Wall
Horizontal
Termination
15