Engineering Data | 4445N Tempest®
Natural Gas Main Air Pressure, (UA pressure tap)
osi "w.c. mbar
4445N-4-A
0.2 0.3 0.9
1
4
9
16
20
24
1.7
6.9 17.2
15.6
27.7
34.6
41.5 103
4.3
39
69
86
Air Flow, not burning scfh (Nm 3 /h)
6600 (176)
Air Flow, scfh
550
1300 (34.7)
2700 (72.7)
4300
5800
6600
7400 (198)
Air Flow (Nm 3 /h)
(14.7)
(115)
(153)
(176)
Air Orifice UA-DA, "w.c. (mbar)
0.2 (0.5) 0.2 (0.5)
1.1 (2.7) 1.4 (3.5)
4.5 (11.2) 4.3 (10.7)
10.8 (26.9) 8.1 (20.2)
19.6 (49) 18.1 (45)
25 (62) 21 (52)
30.4 (76) 24.6 (61)
Gas Pressure @ 10% excess air "w.c. (mbar)
Max % Excess Air, ignition
400 350 800 800
700 700 800 800
1100 1100 1100 1100
1400 1600 1400 1400
1200 1600 1000 1000
1400 1700 1400 1400
1200 1700 1200 1200
Max % Excess Air, Flame Rod flame signal Max % Excess Air, UV flame signal S, M length Max % Excess Air, UV flame signal L, XL Length
Max % XS Fuel, ignition/flame signal
30
30
30
30
30
30
30
Flame Length inches (mm) Flame Diameter inches (mm)
14 (356)
14 (356) 4 (102)
18 (457) 4 (102)
18 (457) 4 (102)
20 (508)
20 (508)
20 (508)
3 (76)
4 (102)
4 (102)
5 (127)
osi "w.c. mbar
4445N-4-B
0.2 0.3 0.9
1
4
9
16
20
1.7
6.9 17.2
15.6
27.7
34.6
4.3
39
69
86
Air Flow, not burning scfh (Nm 3 /h)
8050 (215)
Air Flow, scfh
730
1750
3450 (92.2)
5300 (142)
7300 (195)
8200 (219)
Air Flow (Nm 3 /h)
(19.5)
(46.8)
Air Orifice UA-DA, "w.c. (mbar)
0.2 (0.5) 0.3 (0.7) 0.2 (0.5)
1.3 (3.2) 1.7 (4.2) 1.4 (3.5)
5.0 (12.4) 5.0 (12.4) 4.5 (11.2)
11.8 (29.4) 10.8 (26.9) 9.0 (22.4)
21.2 (52.7) 17.9 (44.5) 16.2 (40.3)
26.6 (62) 23.7 (59) 20.6 (51.3)
Gas Pressure @ Stoic. air "w.c. (mbar) Gas Pressure @ 10% excess air "w.c. (mbar)
Max % Excess Air, ignition
400 400 400 400
1400 1300 1300 900
1700 1200 1600 1400
1400 1200 1500 1000
1400 1300 1400 1300
800 1200 1300 1200
Max % Excess Air, Flame Rod flame signal Max % Excess Air, UV flame signal S, M length Max % Excess Air, UV flame signal L, XL Length
Max % XS Fuel, ignition/flame signal
30
30
30
30
30
30
Flame Length inches (mm) Flame Diameter inches (mm)
17 (432) 3.5 (89)
19 (483) 3.5 (89)
20 (508) 4.0 (102)
21 (533) 4.0 (102)
22 (559) 4.5 (114)
25 (635) 4.5 (114)
Bulletin 4445/4445N Page 4
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