ICP A Series User Manual

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Specifications subject to change without notice.
Table 3 – Minimum Free Area Required for Each Combustion Air Opening or Duct to Outdoors
FURNACE
INPUT
(BTUH)
TWO HORIZONTAL DUCTS
(1 SQ. IN./2,000 BTUH)
(1,100 SQ. MM/KW)
SINGLE DUCT OR OPENIN G
(1 SQ. IN./3,000 BTUH)
(734 SQ. MM/KW)
TWO OPENINGS OR
VERTICAL DUCTS
(1 SQ. IN./4,000 BTUH)
(550 SQ. MM/KW)
Free Area of
Opening and
Duct
Sq. In (Sq. mm)
Round Duct
In. (mm) Dia
Free
A
rea of
Opening and
Duct
Sq. In (Sq. mm)
Round Duct
In. (mm) Dia
Free Area of
Opening and
Duct
Sq. In (mm)
Round Duct
In. (mm) Dia.
40,000* 20 (12904) 5 (127) 14 (8696) 5 (127) 10 (6452) 4 (102)
60,000 30 (19355) 6 (152) 20 (13043) 5 (127) 15 (9678) 5 (127)
80,000 40 (25807) 7 (178) 27 (17391) 6 (152) 20 (12904) 5 (127)
100,000 50 (32258) 8 (203) 34 (21739) 7 (178) 25 (16130) 6 (152)
120,000 60 (38709) 9 (229) 40 (26087) 7 (178) 30 (19355) 6 (152)
EXAMPLES: Determining Free Area
FURNACE WATER HEATER TOT
A
LINPUT
100,000 + 30,000 = (130,000 divided by 4,000) = 32.5 Sq. In.
f
or each two Vertical Ducts or Openings
60,000 + 40,000 = (100,000 divided by 3,000) = 33.3 Sq. In.
f
or each Single Duct or Opening
80,000 + 30,000 = (110,000 divided by 2,000) = 55.0 Sq. In.
f
or each two Horizontal Ducts
Table 4 – Minimum Space Volumes for 100% Combustion, Ventilation and Dilution Air from Outdoors
OTHER THAN FAN-AS SISTED TOTAL
(1,000’S BTUH GAS INPUT RATE)
F
A
N-
A
SSISTED TOTAL
(1,000’S BTUH GAS INPUT RATE)
ACH
30 40 50 40 60 80 100 120
Space
V
olume Ft
3
(M
3
)
0.60 1,050 (29.7) 1,400 (39.6)
1,750
(49.5)
1,400 (39.6) 1,500 (42.5) 2,000 (56.6) 2,500 (70.8) 3,000 (84.9)
0.50 1,260 (35.6) 1,680 (47.5)
2,100
(59.4)
1,680 (47.5) 1,800 (51.0) 2,400 (67.9) 3,000 (84.9)
3,600
(101.9)
0.40 1,575 (44.5) 2,100 (59.4)
2,625
(74.3)
2,100 (59.4) 2,250 (63.7) 3,000 (84.9)
3,750
(106.1)
4,500
(127.3)
0.30 2,100 (59.4) 2,800 (79.2)
3,500
(99.1)
2,800 (79.2) 3,000 (84.9)
4,000
(113.2)
5,000
(141.5)
6,000
(169.8)
0.20 3,150 (89.1)
4,200
(118.9)
5,250
(148.6)
4,200
(118.9)
4,500
(127.3)
6,000
(169.8)
7,500
(212.2)
9,000
(254.6)
0.10
6,300
(178.0)
8,400
(237.8)
10,500
(297.3)
8,400
(237.8)
9,000
(254.6)
12,000
(339.5)
15,000
(424.4)
18,000
(509.2)
0.00 NP NP NP NP NP NP NP NP
NP = Not Permitted
L12F012
Fig. 6 -- Air for Combustion, Ventilation, and Dilution for
Outdoors
L12F013
Fig. 7 -- Air for Combustion, Ventilation, and Dilution from
Indoors

ICP A Series Specifications

General

Brand	ICP
Model	A Series
Category	Furnace
Language	English