Install Instructions

Page 14
LAARS Heating Systems
Figure 8. - Minimum Venting Distance
3.E Locating Vent and Combustion Air
Terminals (continued)
Installations in the Commonwealth of
Massachusetts
In Massachusetts the following items are required if the
side-wall exhaust vent termination is less than seven
(7) feet above nished grade in the area of the venting,
including but not limited to decks and porches. From
Massachusetts Rules and regulations 248 CMR 5.08
(begininning on 2nd page following):
1. Installation of Carbon Monoxide Detectors
At the time of installation of the side wall vented gas
fueled unit, the installing plumber or gas-tter shall
observe that a hard-wired carbon monoxide detector
with an alarm battery back-up is installed on the
oor level where the gas appliance is to be installed.
In addition, the installing plumber or gastter 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 qualied licensed
professionals for 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 with alarm
and battery back-up may be installed on the next
adjacent oor level.
b. In the event that the requirements of the 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 be installed.
2. Approved Carbon Monoxide Detectors
Each carbon monoxide detector shall comply with
NFPA 720 and be ANSI/UL 2034 listed and IAS
certied.
3. Signage
A metal or plastic identication 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 horizontally
vented gas fueled heating appliance or equipment.
The sign shall read, in print 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 appliance 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) 1-4.