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TANKLESS WATER HEATER
ADDITIONAL INSTALLATION REQUIREMENTS FOR THE COMMON
In the Commonwealth of Massachusetts, the installer or service agent shall be a plumber or gas fitter
licensed by the Commonwealth.
When installed in the Commonwealth of Massachusetts or where applicable state codes may apply;
the unit shall be installed with a CO detector per the requirements listed below.
5.08: Modifications to NFPA-54, Chapter 10
(1) Revise NFPA-54 section 1 0.5.4.2 by adding a second exception as follows:
Existing chimneys shall be permitted to have their use continued when a gas conversion burner is
installed, and shall be equipped with a manually reset device that will automatically shut off the gas to
the burner in the event of a sustained back-draft.
(2) Revise 10.8.3 by adding the following additional requirements:
(a) For all side wall horizontally vented gas fueled equipment installed in every dwelling, build-
ing 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 vent-
ed gas fueled equipment. It shall be the responsibility of the property owner to secure the service 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 cannot be met at the time of comple-
tion 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
lAS certified.
LP-172
REV. 02/16/06
76
WEALTH OF MASSACHUSETTS
76
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