UDAP/APD/UDBP Venting Requirements

Form I-UD&APD Series-V-PV (5-17), P/N 195675R20, Page 5
FIGURE 1 - Horizontal Vent Terminal - Residential Installation
(NOTE: Read all measurements; drawing is not proportional.)
Vertical flue extension must
be 6” (152mm) higher than
anticipated snow depth but
no less than 2 ft (610 mm)
above roof.
Approved clearance thimble is
required when flue pipe extends
through combustible materials.
Comply with the requirements
of the Category III vent pipe
manufacturer.
Roof -
pitched
from
0° to 45°
Parapet or
Adjoining Buildings
Option CC1, CC21, or
Novavent #2NVTB4 Vent Cap
6 ft (1.8M)
minimum
Roof Flashing
Category III
Vent Terminal Pipe
6” (152mm) minimum
Category III Vent Pipe
FIGURE 2 -
Vertical Vent
Terminal -
Residential
Installation
(NOTE: Read all
measurements;
drawing is not
proportional.)
Residential Installation
Std Power Vent fan type unit heater - Sizes 30, 45, 60, 75, 100, 125
Approved clearance thimble is required when the flue pipe extends through combustible
materials. Follow the requirements of the thimble and/or Category III vent pipe manufacturer.
Vent Pipe
approved
for a
Category III
heater
Pitch flue pipe down toward
outlet 1/4” per foot for
condensate drainage
(NOTE: Slope applies to
entire horizontal vent run).
Roof or Building Overhang
Parapet or Adjoining Buildings
Option CC1, CC21 or
Novavent #2NVTB4
Vent Cap
Note positions of vent cap
openings (shaded areas).
6” (152mm)
minimum
3 ft (1M)
minimum
6 ft (1.8M) minimum
Wall
Category III
Vent Terminal Pipe
6” (152mm)
minimum