Allied 92G1UH-P, Installation Instructions Manual

507270-03

Page 60  of  60

Issue 1621

REQUIREMENTS for COMMONWEALTH of MASSACHUSETTS

Modifications 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 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 

the 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, 

horizontally vented, gas-fueled equipment, the installing 

plumber or gas fitter shall observe that a hard-wired 

carbon monoxide detector with an alarm and battery 

backup  is  installed  on  the  floor  level  where  the  gas 

equipment is to be installed.  In addition, the installing 

plumber or gas fitter 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, 

horizontally  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.

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 backup 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 completion of installation, the owner shall 

have a period of thirty  

( 3 0 )   d a y s   t o 

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 IAS certified.

3. 

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 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, 

gas-fueled 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 EQUIPMENT 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 manufacturer 
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 sidewall, 

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 

satisfied by the manufacturer:

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 

instructions shall remain with the appliance or 

equipment at the completion of the installation.