VENTING INSTRUCTIONS
21
Installation Requirements Specific To The State Of
Massachusetts For Direct Vent, Mechanical Vent, And
Domestic Hot Water Appliances
In the State of Massachusetts, boiler installation must conform
to state code 248 CMR which includes but is not limited to:
This product must be installed by a licensed Plumber
t
or Gas Fitter.
When flexible connectors are used, the maximum
t
length shall not exceed 36 inches.
When lever type gas shut-offs are used, they shall be
t
T-handle type.
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 ex-
haust 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 satis-
fied:
Installation of carbon monoxide detectors
1.
: 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
vented gas fueled 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.
In the event that the side wall horizontally vented gas
A.
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.
In the event that the requirements of this subdivision
B.
can not be met at the time of completion of installa-
tion, 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:
2.
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
3.
: 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 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
4.
: The state or local gas inspector of the side
wall horizontally vented gas fueled equipment shall not
approve the installation unless, upon inspection, the in-
spector observes carbon monoxide detectors and signage
installed in accordance with the provisions of 248 CMR
5.08(2)(a)1 through 4.
Product-approved vent/air intake
5.
: A product-approved
vent terminal must be used and, if applicable, a product-
approved air intake must be used. Installation shall be in
strict compliance with the manufacturer’s instructions.
Installation instructions
6.
: A copy of all installation
instructions for all Product Approved side wall horizon-
tally vented gas fueled equipment, all venting instructions,
all parts lists for venting instructions, and/or all venting
design instructions shall remain with the appliance or
equipment at the completion of the installation.
National Excelsior Company
www.excelsiorhvac.com
Subject to change without notice.
