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Important Instructions for the Commonwealth of Massachusetts
The Commonwealth of Massachusetts requires compliance with
regulation 248 CMR 4.00 and 5.00 for installation of through –
the – wall vented gas appliances as follows:
(a) 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.
58
(b) 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.
(c) 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.
(d) 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 flue
gases, but identifies "special venting systems", the following
requirements shall be satisfied by the manufacturer:
1.
The referenced "special venting system" instructions shall
be included with the appliance or equipment installation
instructions; 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.
(e) 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.
GAS PRESSURE SUPERVISION
The Commonwealth of Massachusetts requires listed high
and low gas pressure switches (manual-reset) for any model
with a maximum firing input greater than 1,000,000 Btu/Hr in
accordance with 248 CMR 7.04(11)(d).
A gas pressure regulator (field supplied) is required in the gas
train ahead of the heater, for heaters having input rates greater
than 1,000,000 Btu/Hr, in accordance with 248 CMR 7.04 Figure
3B requirements.
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