TM 1-1510-218-10
2-82
Table 2-5. Oxygen Flow Planning Rates vs Altitude
NOTE
All flows in LPM per mask at NTPD
If average climb or descent flows are desired, add the values between altitudes and divide by
the number of values used. This method is preferred over averaging the extremes as some
flow characteristics vary in such a way as to yield an incorrect answer.
CABIN PRESSURE
ALTITUDE IN FEET
CREW MASK
NORMAL
(DILUTER DEMAND)
(1)
CREW MASK
100% OXYGEN
(1)
PASSENGER
MASK
31,000
0 (2)
4.2
3.7 (3)
30,000
0 (2)
4.4
3.7 (3)
29,000
0 (2)
4.7
3.7 (3)
28,000
0 (2)
5.0
3.7 (3)
27,000
0 (2)
5.3
3.7 (3)
26,000
0 (2)
5.6
3.7 (3)
25,000
0 (2)
5.9
3.7
24,000
0 (2)
6.2
3.7
23,000
0 (2)
6.6
3.7
22,000
0 (2)
6.9
3.7
21,000
0 (2)
7.2
3.7
20,000
3.6
7.6
3.7
19,000
3.9
7.9
3.7
18,000
4.2
8.3
3.7
17,000
4.5
8.7
3.7
16,000
4.8
9.1
3.7
15,000
5.1
9.5
3.7
14,000
5.4
10.0
3.7
13,000
5.8
10.4
3.7
12,000
6.1
10.9
3.7
11,000
6.5
11.3
3.7
10,000
6.9
11.9
3.7
(1) Based on minute volume of 20 LPM-BTPS (Body Temperature and Pressure, Saturated).
(2) Use 100% oxygen above 20,000 feet.
(3) Not recommended for other than emergency descent use above 25,000 feet.
