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Requirements for the State of Massachusetts
NOTICE BEFORE INSTALLATION
This appliance must be installed by a licensed plumber or gas fitter in accordance with the Massachusetts
Plumbing and Fuel Gas Code 248 CMR Sections 4.00 and 5.00.
IMPORTANT: In the State of Massachusetts (248 CMR 4.00 & 5.00)
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. No installation or replacement of a vented gas appliance
shall be permitted unless a battery powered or electrically hard wired carbon monoxide detector is present
on the same floor as the appliance or on the next adjacent floor when the appliance is located in a crawl
space unless the appliance is located in a detached, uninhabitable garage. For all residential dwellings, a
carbon monoxide detector must also be present on each habitable level of the dwelling. These requirements
shall not be deemed to waive any additional requirements imposed by M.G.L. c. 148 §26F1/2.
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. Whenever any through-the-wall vent is installed less than seven feet above the finished grade,
a metal or plastic identification plate shall be permanently mounted to the exterior of the building at a
minimum height of eight feet above grade directly in line with the exhaust vent terminal. The sign shall
read, in print size no less than 0.5 inches 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 5.09 and 5.12.
Summary of Contents for NFB-175H
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