Safety
7
Important Regulatory and Installation Requirements
For installations in the Commonwealth of Massachusetts,
the following local requirements apply in addition to all other
applicable NFPA requirements:
1) For direct-vent appliances, mechanical-vent heating appliances or domestic hot water equipment, where the bottom of
the vent terminal and the air intake is installed below four feet above grade the following requirements must be satisfied.
1. If there is not one already present, on each floor level where there are bedroom(s), a carbon monoxide detector
and alarm shall be placed in the living area outside the bedroom(s). The carbon monoxide detector shall comply
with NFPA 720 (2005 Edition).
2. A carbon monoxide detector shall be located in the room that houses the appliance or equipment and shall:
a. Be powered by the same electrical circuit as the appliance or equipment such that only one service switch
services both the appliance and the carbon monoxide detector;
b. Have battery back-up power;
c. Meet ANSI/UL 2034 Standards and comply with NFPA 720 (2005 Edition); and
d. Have been approved and listed by a Nationally Recognized Testing Laboratory as recognized under 527
CMR.
3. 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. A copy of the installation
instructions shall remain with the appliance or equipment at the completion of the installation.
4. A metal or plastic identification plate shall be mounted at the exterior of the building, four feet directly above the
location of the vent terminal. The plate shall be of sufficient size to be easily read from a distance of eight feet
away, and read
”Gas Vent Directly Below”
.
For direct-vent appliances, mechanical-vent heating appliances or domestic hot water equipment where the bottom of the
vent terminal and the air intake is installed above four feet above grade the following requirements must be satisfied:
1. If there is not one already present, on each floor level where there are bedroom(s), a carbon monoxide detector
and alarm shall be placed in the living area outside the bedroom(s). The carbon monoxide detector shall comply
with NFPA 720 (2005 Edition).
2. A carbon monoxide detector shall:
a. Be located in the room that houses the appliance or equipment;
b. Be either hard-wired or battery powered or both; and
c. Shall comply with NFPA 720 (2005 Edition).
3. 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. A copy of the installation
instructions shall remain with the appliance or equipment at the completion of the installation.
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