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CAN/GCA-B149.
the side wall horizontal vented gas fueled
equipment. It shall be the responsibility of the
property owner to secure the services of
qualified licensed professionals for the
installation of hard wired carbon monoxide
detectors.
The National Fuel Gas Code is available by
writing:
American National Standards Institute, Inc.
1430 Broadway
New York, NY 10018
NFPA publications are available by writing:
National Fire Protection Association
Batterymarch Park
Quincy, ME 02269
IMPORTANT NOTE
INSTALLATION REQUIREMENTS =
COMMONWEALTH OF
MASSACHUSETTS
The Commonwealth of Massachusetts
requires compliance with regulation 248 CMR
5.00 for installation of the side wall horizontal
venting. The following requirements shall be
satisfied.
INSTALLATION OF CARBON
MONOXIDE DETECTORS
At the time of installation of the side wall
horizontal vented gas fuel equipment, the
installing plumber or gasfitter shall observe
that a hard wired carbon monoxide detector
with an alarm and battery back-up is installed
on the floor level where the gas equipment 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
ALL MODELS
Front
Back
Sides
Vent
Top
Duct (Plenum)
w/Coil Box
w/o Coil Box
(within 3 feet)
CLOSET
Inches
1"
0
0
0
6
0
1/4
ALC OVE
Inches
1"
0
0
0
6
0
1/4
*Note: For 1" clearance, use a fully Iouvered door with at least
400 square inches of free airflow area.
Table 4. Minimum Clearances
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 detector with alarm and battery
back-up may be installed on the next adjacent
floor level.
In the event that the requirements of this
subdivision can not 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 shall
be installed.
APPROVED CARBON MONOXIDE
DETECTORS
Each carbon monoxide detector as required in
accordance with the above provisions shall
comply with NFPA 720 and be ANSI/UL 2034
listed and IAS certified.
SIGNAGE
A metal or plastic identification plate shall be
permanently mounted to the exterior of the
building at minimum height of eight feet above
grade directly in line with the exhaust vent
terminal for the horizontally vented gas fueled
heating appliance or equipment. The sign shall
read, in print size no less than one-half (1/2)
inch in size, "GAS VENT DIRECTLY BELOW.
KEEP CLEAR OF ALL OBSTRUCTIONS."
INSPECTION
The state or local gas inspector of the side wall
horizontally vented gas fueled equipment shall
not approve the installation unless, upon
inspection, inspector observes carbon
monoxide detectors and signage installed in
accordance with the provisions of 248 CNR
5.08(2)(a) 1 through 4.
Exemptions: The following equipment is
exempt frolTl 248 CMR 5.08(2)(a) 1 through 4:
Product approved side wall horizontally vented
f_eled equipment installed in room or structure
separated from the dwelling, building or
structure used in whole or in part for residential
purposes.
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