Installation Procedure For Vertical Venting - Watts Aerco Modulex EXT Series Technical Application Manual

Modulex EXT Vent and Combustion Air Application Guide

3.3. INSTALLATION PROCEDURE FOR VERTICAL VENTING

WARNING!
Do not insulate or otherwise wrap vent pipe or fittings. Follow the vent pipe manufacturer's
installation instructions for vertical venting.
WARNING!
Non-motorized louvers and grilles must be fixed in an open position.
Minimum screens mesh size shall not be smaller than ¼ inch mesh.
The Vent Termination Must Be Located As Follows:
a. Unit is certified for zero clearance to combustible materials.
b. Combustion air inlet must be 3 ft. below any vent outlet, within 10 ft. See Figure 20.
c. Vertical terminations shall extend at least 3 ft. (0.9 m) above the highest point where it passes
through a roof of a building and at least 2 ft. (0.6 m) higher than any portion of the building
within a horizontal distance of 10 ft. (3 m). Terminations that extend more than 2 ft above the
roof must be laterally supported.
d. Combustion air inlet must also face away from the vent outlet. See Figure 20.
e. Use vent pipe manufacturers vent or rain cap, fire stop, support collar, roof flushing, and storm
collar.
3 FT (91 CM)
MINIMUM
Page 24 of 28
09/25/2017
LESS THAN 10 FT
(305 CM)
3 FT (91 CM)
MINIMUM
Figure 20: Vent Termination Locations
AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913
Phone: 800-526-0288
MORE THAN 10 FT
(305 CM)
10 FT
(305 CM)
2 FT (61 CM) MIN.
NOTE:
NO HEIGHT ABOVE RIDGE REQUIRED FOR
VENT TERMINATION WHEN DISTANCE FROM
RIDGE IS MORE THAN 10 FT (305 CM).
IF DISTANCE FROM RIDGE IS LESS THAN 10 FT
(305 CM), TERMINATION MUST BE A MIN. OF 2
FT ABOVE RIDGE.
RIDGE
TAG-0054-0F
GF-136-V