6
Installation Requirements for the Commonwealth of Massachusetts
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 codes; the unit shall be installed with a CO detector
per the requirements listed below.
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:
A 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).
B. 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.
C. 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.
D. A metal or plastic identification plate shall be mounted at the exterior of the building, four feet directly above the location of 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”.
2.
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:
A 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).
B. 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).
C. 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 instructions. A copy of the installation instructions shall remain with the appliance or equipment at the com-
pletion of the installation.
