9
IMPORTANT!
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.
(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.
