Carrier 160 Series - Outdoor Combustion Air Method; The Standard Method

PER 4000
DUCTS ~~~ Le
TO BTUH
OUTDOORS
—
T
I
! !
(305mm) 12” MAX 12”
305mm,
1 SQIN. Sey _|_MAX
PER 2000 B) 4&5 ES 4
BTUH* <3 Fa
Sa 1SQIN
oa PER
G x 4000
| BTUH*
n
oe
DUCTS 8
TO OS
OUTDOORS 5
5
1SQIN
PER
4000
BTUH*
1SQIN. a
PER 2000 i El] Gee 1
BTUH* VI 12"
(305mm) 12” MAX c { Max (805mm)
12" MAX {
OT | (305mm)
CIRCULATING AIR DUCTS
DUCT 1SQIN.
TO PER 4000
OUTDOORS BTUH*
*Minimum dimensions of 3-in. (76 mm).
NOTE: Use any of the following combinations of openings:
A&BC&DD&EF&G
A08174
Fig. 7 - Air for Combustion, Ventilation, and Dilution for
Outdoors
© Spaces having at least 50 cubic feet per 1,000 Btuh
may use the INDOOR COMBUSTION AIR,
STANDARD or KNOWN AIR INFILTRATION
METHOD.
Outdoor Combustion Air Method
1. Provide the space with sufficient air for proper combus-
tion, ventilation, and dilution of flue gases using perman-
ent horizontal or vertical duct(s) or opening(s) directly
communicating with the outdoors or spaces that freely
communicate with the outdoors.
. Fig. 7 illustrates how to provide TWO OUTDOOR
OPENINGS, one inlet and one outlet combustion and
ventilation air opening, to the outdoors.
bo
e. One opening MUST commence within 12 in. (300
mm) of the ceiling and the second opening MUST
commence within 12 in. (300 mm) of the floor.
f. Size openings and ducts per Fig. 7 and Table 2.
g. TWO HORIZONTAL DUCTS require 1 sq. in. (645
sq. mm) of free area per 2,000 Btuh (1,100 mm2/kW)
of combined input for all gas appliances in the space
per Fig. 7 and Table 2.
h. TWO OPENINGS OR VERTICAL DUCTS require 1
sq. in. (645 sq. mm) of free area per 4,000 Btuh (550
mm2/kW) for combined input of all gas appliances in
the space per Fig. 7 and Table 2.
3. ONE OUTDOOR OPENING requires:
a. 1 sq. in. (645 sq. mm) of free area per 3,000 Btuh
(734 mm2/kW) for combined input of all gas appli-
ances in the space per Table 2 and
b. Not less than the sum of the areas of all vent connect-
ors in the space.
CIRCULATING AIR
DUCTS VENT THROUGH ROOF
fo (1
Le bs (305mm)
ot
1 SQIN.
PER 1000
_| BTUH* IN DOOR
OR WALL
UNCONFINED
INTERIOR SPACE
HEATED
SPACE
6" MIN (152mm)
(FRONT)G
1 SQIN.
ER 1000
TUH* IN DOOR
ALL
CLEARANCE
IN
FRONT
OF
COMBUSTION
AIR
OPENINGS
SHALL
BE AT
LEASTS
IN.
12" MAX (305mm)
CIRCULATING AIR DUCTS
* Minimum opening size is 100 sq in. (64516 sq. mm)with minimum dimensions
of 3 in. (76 mm)
+ Minimum of 3 in. (76 mm) when type-B1 vent is used.
A03175
Fig. 8 - Air for Combustion, Ventilation, and Dilution from
Indoors
The opening shall commence within 12 in. (300 mm) of the
ceiling. Appliances in the space shall have clearances of at least 1
in. (25 mm) from the sides and back and 6 in. (150 mm) from the
front. The opening shall directly communicate with the outdoors
or shall communicate through a vertical or horizontal duct to the
outdoors or spaces (crawl or attic) that freely communicate with
the outdoors.
Indoor Combustion Air© NFPA & AGA
Standard and Known-Air-Infiltration Rate Methods
Indoor air is permitted for combustion, ventilation, and dilution,
if the Standard or Known-Air-Infiltration Method is used.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
Many homes require air to be supplied from outdoors
for furnace combustion, ventilation, and dilution of flue
gases.
The furnace combustion air supply must be provided in
accordance with this instruction manual.
The Standard Method:
1. The space has no less volume than 50 cubic feet per 1,000
Btuh of the maximum input ratings for all gas appliances
installed in the space and
2. The air infiltration rate is not known to be less than 0.40
air changes per hour (ACH).
The Known Air Infiltration Rate Method shall be used, if the
infiltration rate is known to be:
1. Less than 0.40 ACH and
2. Equal to or greater than 0.10 ACH
58CV