11
Combustion Air and Venting
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 bed-
room(s), a carbon monoxide detector
and alarm shall be placed in the living
area outside the bedroom(s). The car-
bon monoxide detector shall comply
with NFPA 720 (2005 Edition).
2. A carbon monoxide detector shall also
be located in the room that houses the
appliance or equipment and shall:
a. Be powered by the same electrical cir-
cuit 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 the
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 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
”.
Installer must provide tag identification
plate and ensure the lettering meets code
requirements.
For direct-vent appliances, mechanical-
vent heating appliances or domestic hot
water equipment, where the bottom of the
vent terminal and the air intake are 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 bed-
room(s), a carbon monoxide detector
and alarm shall be placed in the living
area outside the bedroom(s). The car-
bon monoxide detector shall comply
with NFPA 720 (2005 Edition).
2. A carbon monoxide detector shall:
a. Be located in the room that houses the
appliances 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.
NOTICE
Commonwealth of Massachusetts Installations Only
