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Ventilation & Combustion Air
!
Air openings to combustion area must not
be obstructed. By following the chart above,
adequate combustion air can be maintained.
Figure 19 - Closet Installation
Closet Installation: Vent opening must be placed in wall
or door directly across from front of boiler with minimum
opening as listed above. Vent opening must be located 28"
(71.12 cm) up from floor. See Figure 19.
Note: If covering hole with screen or using louvers, opening
must have same free flowing area as opening in wall with
no screen or louvers.
Installation Requirements Specific To State Of
Massachusetts For Direct Vent, Mechanical Vent, and
Domestic Hot Water Appliances
In the State of Massachusetts, boiler installation must
conform to state code 248 CMR which includes but is not
limited to:
VENTING INSTRUCTIONS
Venting Requirements
Vent Opening
Boiler Size
Dimensions
3 Section
5" X 5" (13 cm x 13 cm)
4 Section
8" x 8" (20 cm x 20 cm)
5 Section
9" x 9" (23 cm x 23 cm)
WARNING
Combustion Air
Requirements
3" (8cm) Inlet Pipe length
30 Ft (914cm) with 2 Elbows
30 Ft (914cm) with 2 Elbows
20 Ft (610 cm) with 2 Elbows
• This product must be installed by a licensed
Plumber or Gas Fitter.
• When flexible connectors are used, the maximum
length shall not exceed 36 inches.
• When lever type gas shutoffs are used, they shall
be T-handle type.
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 gas-fitter 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 gas-fitter 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.
19
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