18-CD35D1-1 23
INSTALLER’S GUIDE
IMPORTANT:
The Commonwealth of Massachusetts requires
compliance with regulation 248 CMR 4.00 and 5.00
for installation of through – the – wall vented gas
appliances as follows:
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
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
horizontal vented gas fueled equipment, the installing
plumber or gasfitter shall observe that a hard wired
carbon monoxide detector with an alarm and battery
back-up is installed on the floor level where the gas
equipment is to be installed. In addition, the installing
plumber or gasfitter 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 horizontal 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 back-
up may be installed on the next adjacent floor
level.
b. In the event that the requirements of this
subdivision can not 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 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.
This appliance requires a special venting system.
If BAYAIR30AVENTA or BAYVENT200B are used,
a copy of the installation instructions for the kit
shall remain with the appliance or equipment at the
completion of installation.
