8105753-06 - 9/19
CI-HGS-E Installation, Operating & Service Manual
NOTICE: Clearance to venting is for single wall
vent pipe. If Type L vent is used, clearance may
be reduced to the minimum required by the vent
pipe manufacturer.
C. PROVIDE COMBUSTION AND VENTILATION
AIR. Local and National Codes may apply and
should be referenced.
WARNING
Adequate combustion and ventilation air must
be provided to assure proper combustion and
to maintain safe ambient air temperatures.
Do not install boiler where gasoline or other
flammable vapors or liquids, or sources of
hydrocarbons (i.e. bleaches, fabric softeners,
etc.) are used or stored.
1. Determine volume of space (boiler room).
Rooms communicating directly with the
space in which the appliances are installed,
through openings not furnished with doors, are
considered a part of the space.
Volume(ft3) = Length(ft) x Width(ft) x Height(ft)
2. Determine total input of all appliances in the
space.
Add inputs of all appliances in the space and
round the result to the nearest 1000 BTU per
hour.
3. Determine type of space. Divide Volume by
total input of all appliances in space. If the
result is greater than or equal to 50 ft3/1000
BTU per hour, then it is considered an
unconfined space. If the result is less than
50 ft3/1000 BTU per hour then the space is
considered a confined space.
4. For boiler located in an unconfined space of a
conventionally constructed building, the fresh
air infiltration through cracks around windows
and doors normally provides adequate air for
combustion and ventilation.
5. For boiler located in a confined space or an
unconfined space in a building of unusually
tight construction, provide outdoor air.
Outdoor air may be provided with the use of
two permanent openings which communicate
directly or by duct with the outdoors or spaces
(crawl or attic) freely communicating with the
outdoors. Locate one opening within 12 inches
of top of space. Locate remaining opening
within 12 inches of bottom of space. Minimum
dimension of air opening is 3 inches. Size
each opening per following:
a. Direct communication with outdoors.
Minimum free area of 1 square inch per
4,000 BTU per hour input of all equipment in
space.
b. Vertical ducts.Minimum free area of 1
square inch per 4,000 BTU per hour input
of all equipment in space. Duct cross-
sectional area shall be same as opening
free area.
Figure 2B: Direct Vent - Minimum Installation Clearances To Combustible Materials (Inches)
NOTES: 1. Listed clearances comply with American National
Standard ANSI/NFPA 31,Standard for the Installation of
Oil Burning Equipment.
2. CI-HGS-E boilers can be installed in rooms with
clearances from combustible material as listed
above. Listed clearances cannot be reduced for alcove or
closet installations.
3. For reduced clearances to combustible material,
protection must be provided as described in the above
ANSI/NFPA 31 standard.
3"
3"
24"
6"
3"3"
6"6"
6"
VENT
PIPING
AIR INTAKE
PIPING
(REMOVED
FOR CLARITY)
FDVS
DIRECT
VENT
AIR
INTAKE
PIPING
AIR
INTAKE
PIPING
3"
2Pre-Installation (continued)
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