Locating Vent & Combustion Air Terminals - Bradford White Brute Installation And Operating Instructions Manual

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Vertical Vent Terminal
When the unit is vented through the roof, the vent must
extend at least 3 feet (0.9m) above the point at which it
penetrates the roof. It must extend at least 2 feet (0.6m)
higher than any portion of a building within a horizontal
distance of 10 feet (3.0m), and high enough above the roof
line to prevent blockage from snow. The vent terminal
included with the Brute can be used in both vertical and
horizontal applications. When the combustion air is taken
from the roof, the combustion air must terminate at least
12" (30cm) below the vent terminal. (See Figure 18.)
Vertical Combustion Air Terminal
When combustion air is taken from the roof, a field-
supplied rain cap or an elbow arrangement must be used
to prevent entry of rain water. (Figure 18.) The opening on
the end of the terminal must be at least 12" (30cm) above
the point at which it penetrates the roof, and high enough
above the roof line to prevent blockage from snow. When
the vent terminates on the roof, the combustion air must
terminate at least 12" (30cm) below the vent terminal.
Installations in the Commonwealth of
Massachusetts
In Massachusetts the following items are required if the
side-wall exhaust vent termination is less than seven
(7) feet above finished grade in the area of the venting,
including but not limited to decks and porches. From
Massachusetts Rules and regulations 248 CMR 5.08
(begininning on 2nd page following):
1. Installation of Carbon Monoxide Detectors
At the time of installation of the side wall vented gas
fueled appliance, the installing plumber or gas-fitter
shall observe that a hard-wired carbon monoxide
detector with an alarm battery back-up is installed
on the floor level where the gas appliance is to be
installed. In addition, the installing plumber or gasfitter
shall observe that a battery operated or hard-wired
carbon monoxide detector with an alarm is installed
on each additional level of the dwelling, building or
structure served by the side-wall horizontally vented
gas fueled equipment. It shall be the responsibility of
the property owner to secure the services of qualified
licensed professionals for installation of hard-wired
carbon monoxide detectors.
a. In the event that the side-wall horizontally vented
gas fueled equipment is installed in a crawl space or an
attic, the hard-wired carbon monoxide with alarm and
battery back-up may be installed on the next adjacent
floor level.
b. In the event that the requirements of the subdivision
cannot be met at the time of completion of installation,
the owner shall have a period of thirty (30) days to
comply with the above requirements, provided, however,
that during said thirty (30) day period, a battery operated
carbon monoxide detector with an alarm be installed.
2. Approved Carbon Monoxide Detectors
Each carbon monoxide detector shall comply with NFPA
720 and be ANSI/UL 2034 listed and IAS certified.
3. Signage
A metal or plastic identification plate shall be
permanently mounted to the exterior of the building at
a minimum height of eight (8) feet above grade directly
in line with the exhaust vent terminal for horizontally
vented gas fueled heating appliance or equipment. The
sign shall read, in print no less than one-half (1/2) inch in
size: "GAS VENT DIRECTLY BELOW, KEEP CLEAR
OF ALL OBSTRUCTIONS."
4. Inspection
The state or local gas inspector of the side-wall horizontally
vented gas fueled appliance shall not approve the installation
unless, upon inspection, the inspector observes carbon
monoxide detectors and signage installed in accordance with
the provisions of 248 CMR 5.08(2)(a) 1-4.
Figure 21. Multiple Side-Wall Terminals,
B W
RADFORD HITE