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Heat & Glo • SL-550 / 750 / 950TR-D • InD • 2044-985 Rev. M • 10/06
G. Requirements for the Commonwealth of
Massachusetts
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 fi nished grade in the area of the venting,
including but not limited to decks and porches, the following
requirements shall be satisfi ed:
Installation of Carbon Monoxide Detectors
At the time of installation of the side wall horizontal vented
gas fueled equipment, the installing plumber or gasfi tter
shall observe that a hard wired carbon monoxide detector
with an alarm and battery back-up is installed on the
fl oor level where the gas equipment is to be installed. In
addition, the installing plumber or gasfi tter 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 qualifi ed licensed professionals for the installation of
hard wired carbon monoxide detectors.
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 fl oor level.
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.
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 certifi ed.
Signage
A metal or plastic identifi cation 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”.
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.
Exemptions
The following equipment is exempt from 248 CMR
5.08(2)(a)1 through 4:
• 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
• 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.
MANUFACTURER REQUIREMENTS
Gas Equipment Venting System Provided
When the manufacturer of Product Approved side wall
horizontally vented gas equipment provides a venting
system design or venting system components with the
equipment, the instructions provided by the manufacturer
for installation of the equipment and the venting system
shall include:
• Detailed instructions for the installation of the venting
system design or the venting system components; and
• A complete parts list for the venting system design or
venting system.
Gas Equipment Venting System NOT Provided
When the manufacturer of a Product Approved side wall
horizontally vented gas fueled equipment does not provide
the parts for venting the fl ue gases, but identifi es “special
venting systems”, the following requirements shall be
satisfi ed by the manufacturer:
• The referenced “special venting system” instructions
shall be included with the appliance or equipment instal-
lation instructions; and
• The “special venting systems” shall be Product Approved
by the Board, and the instructions for that system shall in-
clude a parts list and detailed installation instructions.
A copy of all installation instructions for all Product Ap-
proved side wall horizontally vented gas fueled equipment,
all venting instructions, all parts lists for venting instruc-
tions, and/or all venting design instructions shall remain
with the appliance or equipment at the completion of the
installation.
See Gas Connection section for additional Common-
wealth of Massachusetts requirements.
NOTE: The following requirements reference various
Massachusetts and national codes not contained in this
document.