Heat & Glo • Passage • 700-900 Rev. M • 12/07
8
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, includ-
ing but not limited to decks and porches, the following re-
quirements shall be satisfied:
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 addi-
tion, 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 hori-
zontal vented gas fueled equipment. It shall be the respon-
sibility of the property owner to secure the services of qual-
ified licensed professionals for the installation of hard wired
carbon monoxide detectors.
In the event that the side wall horizontally vented gas fu-
eled equipment is installed in a crawl space or an attic, the
hard wired carbon monoxide detector with alarm and bat-
tery back-up may be installed on the next adjacent floor
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
be ANSI/UL 2034 listed and IAS certified.
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 ex-
haust 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 OB-
STRUCTIONS”.
Inspection
The state or local gas inspector of the side wall horizontally
vented gas fueled equipment shall not approve the installa-
tion 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 fu-
eled equipment installed in a room or structure sepa-
rate from the dwelling, 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 hor-
izontally vented gas equipment provides a venting system
design or venting system components with the equipment,
the instructions provided by the manufacturer for installa-
tion of the equipment and the venting system shall include:
• Detailed instructions for the installation of the venting
system design or the venting system components; and
• A complete parts list for the venting system design or
venting system.
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 sat-
isfied by the manufacturer:
• The referenced “special venting system” instructions shall
be included with the appliance or equipment installation
instructions; and
• 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 Ap-
proved side wall horizontally vented gas fueled equipment,
all venting instructions, all parts lists for venting instruc-
tions, and/or all venting design instructions shall remain
with the appliance or equipment at the completion of the
installation.
See Gas Connection section for additional Common-
wealth of Massachusetts requirements.
NOTE:
The following requirements reference various
Massachusetts and national codes not contained in
this document.
Requirements for the Commonwealth of
Massachusetts
