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Requirements for Commonwealth of Massachusetts
Modications to NFPA-54, Chapter 10
Revise  NFPA-54  section  10.8.3  to  add  the  following 
requirements:
For all side wall, horizontally vented, gas-fueled equip-
ment 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) 
-
cluding but not limited to decks and porches, the following 
1 -   INSTALLATION OF CARBON MONOXIDE 
DETECTORS. At the time of installation of the side 
wall, horizontally vented, gas-fueled equipment, 
a hard-wired carbon monoxide detector with an 
        
level where the gas equipment is to be installed. 
  
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, horizontally vented, 
gas-fueled equipment. It shall be the responsibility 
of the property owner to secure the services of 
     
of hard-wired carbon monoxide detectors.
a.  I n 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 
b.   In the event that the requirements of this subdivision cannot 
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.
2 -   APPROVED CARBON MONOXIDE 
DETECTORSach carbon monoxide detector as 
required in accordance with the above provisions 
shall comply with NFPA 720 and be ANSI/UL 2034 
3 -        
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
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 5.08(2)
(a) 1 through 4.
EXEMPTIONS:  The  following  equipment  is  exempt-
from 24 CMR 5.08(2)(a) 1 through 4:
1 -   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
2 -   Product Approved side wall, horizontally vented, 
gasfueled equipment installed in a room or structure 
separate from the dwelling, building or structure 
used in whole or in part for residential purposes.
MANUFACTURER REQUIREMENTS - GAS EQUIP-
MENT VENTING SYSTEM PROVIDED.
When the manufacturer of Product Approved side wall, 
horizontally vented, gas-fueled equipment provides a 
venting system design or venting system components 
with the equipment, the instructions provided by the man-
ufacturer for installation of the equipment and the venting 
system shall include:
1 -   Detailed instructions for the installation of the venting 
system design or the venting system components: 
and
2 -   A complete parts list for the venting system design 
or venting system.
MANUFACTURER REQUIREMENTS -
GAS EQUIPMENT VENTING SYSTEM NOT PROVIDED.
When the manufacturer of Product Approved side wall, 
horizontally vented, gas-fueled equipment does not pro-
         
“special venting systems,” the following requirements 
1 -   The referenced “special venting system” instructions 
shall be included with the appliance or equipment 
installation instructions; and
2 -   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 
Approved  side  wall,  horizontally  vented,  gas-fueled 
equipment, all venting instructions, all parts lists for 
venting instructions, and/or all venting design instruc-
tions shall remain with the appliance or equipment at 
the completion of the installation.