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PART 9. SPECIAL INSTALLATION REQS
For all side wall horizontally vented
gas fueled equipment installed
in every dwelling, building or
structure used in whole or in part
for residential purposes, including
those owned or operated by the
Commonwealth and where 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, the following requirements
shall be satisfied:
1. INSTALLATION OF CARBON
MONOXIDE DETECTORS. At the
time of installation of the side
wall horizontal vented gas fueled
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
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.
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
detector with alarm and
battery back-up may be
installed on the next adjacent
floor level.
b. In the event that the
requirements of this
subdivision can not 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 shall be installed.
2. 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.
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 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”.
4. INSPECTION. The state or local
gas inspector of the side wall
horizontally vented gas fueled
equipment 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 through 4.
a. EXEMPTIONS: The following
equipment is exempt from 248
CMR 5.08(2)(a)1 through 4:
1. The equipment listed
in Chapter 10 entitled
“Equipment Not Required
To Be Vented” in the most
current edition of NFPA 54
as adopted by the Board;
and
2. Product Approved side wall
horizontally vented gas
fueled equipment installed
in a room or structure
separate from the dwelling,
building or structure used
in whole or in part for
residential purposes.
PART 9. SPECIAL INSTALLATION REQS
A. INSTALLATION REQUIREMENTS—MASSACHUSETTS
Requirements for installation—Commonwealth of Massachusetts
