© 2021 United States Stove Company
5
REQUIREMENTS FOR THE
COMMONWEALTH OF
MASSACHUSETTS
Please read and follow these special requirements
NOTE REGARDING VENTED PRODUCTS
• This product must be installed by a licensed
plumber or gas fitter when installed within the
Commonwealth of Massachusetts.
• Any residence with a direct vent product must
have a CO detector installed in the residence.
• Installation of the unit or vented gas log in the
State of Massachusetts requires the damper to be
permanently removed or welded in the fully open
position.
• In addition, a naturally vented gas log may not be
installed in a bedroom or bathroom in the State of
Massachusetts.
• Flex line installation must not exceed 36 inches
and must have a T shutoff valve.
NOTE REGARDING VENT FREE
PRODUCTS
• This product must be installed by a licensed
plumber or gas fitter when installed within the
Commonwealth of Massachusetts.
• In addition, vent free products may not be
installed in a bedroom or bathroom regardless of
size or type in the State of Massachusetts.
• Flex line installation must not exceed 36 inches
and must have a T shutoff valve.
CARBON MONOXIDE DETECTOR
REQUIREMENTS
Revise 10.8.3 by adding the following additional
requirements:
a. For all side wall horizontally vented gas fuelled
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 fuelled 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 with an alarm is installed on
each additional level of the dwelling, building or
structure served by the side wall horizontal vented
gas fuelled 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 fuelled 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.
3. 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.
4.
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
fuelled 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.”
5. Inspection: The state or local gas inspector of
the side wall horizontally vented gas fuelled
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.
MASSACHUSETTS RESIDENTS ONLY
Summary of Contents for AG23
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