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Heatilator • Novus NNXT • 4055-879 • Rev. o • 2/1216
NOTE: An installation will have either a
vertical termination or a horizontal
termination. It will not have both (as shown).
Noncombustible Roof Flashing
maintains minimum clearance
around pipe (Section 10)
Ceiling Firestop on
floor of attic (Section 8)
Vent Pipe (Section 8)
Horizontal Termination Cap
(Section 10)
Framing/Header
(Section 5)
Gas Line
(Section 12)
Hearth Extension
(Not required)
Surround (Section 14)
Mantel & Mantel Leg
(Section 5 & 14)
Optional Wall Switch
(Section 12)
Framing headed off in
ceiling joists (Section 8)
Attic Insulation Shield (not shown) must be used
here to keep insulation away from vent pipe if
attic is insulated (Section 8)
Vent Pipe penetrates roof preferably
without affecting roof rafters
Storm Collar
(Section 10)
Vertical Termination Cap
(Section 10)
A. Typical Appliance System
NOTICE: Illustrations and photos refl ect typical installations and are for design purposes only. Illustrations/diagrams are not
drawn to scale. Actual product may vary from pictures in manual
Figure 4.1 Typical System
4
4
Getting Started
Installer Guide
Note: Dual venting confi gurations
ARE NOT allowed. Appliance
MUST be vented EITHER vertically
OR horizontally.