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© 2021 United States Stove Company
MASSACHUSETTS RESIDENTS ONLY
REQUIREMENTS FOR THE
COMMONWEALTH OF
MASSACHUSETTS
This product must be installed by a licensed
plumber or gas tter when installed within the
Commonwealth of Massachusetts.
NOTE REGARDING VENTED PRODUCTS
Flex line installation must not exceed 36 inches
and must have a T shutoff valve. Any residence
with a direct vent product must have a CO detector
installed in the residence. Installation of the replace
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,
neither a naturally vented gas log nor a vent-
free product may be installed in a bedroom or
bathroom in the State of Massachusetts. All gas
tting and installation of this heater shall only be
done by a licensed gas tter or licensed plumber.
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
nished grade in the area of the venting, including
but not limited to decks and porches, the following
requirements shall be satised:
INSTALLATION OF CARBON MONOXIDE
DETECTORS
At the time of installation of the side wall horizontal
vented gas fueled equipment, the installing
plumber or gas tter shall observe that a 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
qualied 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 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, 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 ANSI/UL 2034 listed and IAS
certied.
SIGNAGE
A metal or plastic identication 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:
• 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.
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