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The following requirements reference various Massachusetts and national codes not contained in this manual.
For all sidewall 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 (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:
INSTALLATION OF CARBON MONOXIDE DETECTORS
At time of installation of side wall horizontally vented gas fueled equipment, the installing plumber or gas-fitter
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 gas-fitter shall observe
that a battery operated or hard wired carbon monoxide detector 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. In the event that the side wall horizontally vented gas fueled equipment
is installed in a crawl space or 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
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 certified.
SIGNAGE
A metal or plastic identification plate shall be permanently mounted to the exterior of the building at a minimum
of eight (8) feet above grade directly in line with the exhaust vent terminal for the horizontally vented gas fueled
heating the appliance or equipment. The sign shall read, in print no less the one-half inch (½) 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 Product Approved side wall horizontally vented gas equipment does not provide
the parts for venting the flue gases, but identifies “special venting systems”, the following requirements shall be
satisfied by the manufacturer:
The referenced “special venting systems” instructions shall be included with the appliance or equipment
installation instructions and;
The “special venting systems” shall be Product Approved by the Board, and the instructions for that system shall
include a parts list and detailed installation instructions.
A copy of all installation instructions for all Product Approved side wall horizontally vented gas fueled equipment,
all venting instructions, all parts lists for venting instructions, and/or all venting design instructions shall remain with
the appliance or equipment at the completion of the installation.
Requirements For The Commonwealth Of Massachusetts
Summary of Contents for DVAG11
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