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INSTALLATION REQUIREMENTS FOR THE COMMONWEALTH OF MASSACHUSETTS
For all side wall terminated, horizontally vented power vent, direct vent, and power direct vent gas fueled water heaters 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 sidewall 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 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 CSA 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:
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 dwell-
ing, 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:
1. Detailed instructions for the installation of the venting system design or the venting system components; and
2. A complete parts list for the venting system design or venting system.
MANUFACTURER REQUIREMENTS - 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:
1. The referenced "special venting system" instructions shall be included with the appliance or equipment installation instruc-
tions; and
2. 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 equip-
ment at the completion of the installation.that the discharge pipe be terminated at an adequate drain inside the building.
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