Noctua company released three fans sizes 140 and 150 millimeters. Â The model NF-A14 FLX, NF-A14 ULN and NF-A15 PWM, which, like the previously presented models Series A, based on self-stabilization mechanism (SSO2).
The distinctive feature of NF-A14 FLX model is the presence of adapter kit LNA (Low-Noise Adapter) and ULNA (Ultra-Low-Noise Adapter), allowing to set the desired speed and noise.  Product of similar size, NF-A14 ULN, different from the previous model only reduced speed, and 150-mm fan NF-A15 PWM, except the presence of  PWM control support.
Model
NF-A14 FLX
NF-A14 ULN
NF-A15 PWM
Dimensions in mm
140 x 140 x 25
140 x 150 x 25
Jack
3-pin
4-pin
Bearing
SSO2
Speed, r. min.
1200
800
300-1200
Rotational Speed with LNA, vol. min.
1050
650
300-900
Rotational Speed with ULNA, vol. min.
900
-
-
Air flow, m ³ / h
115.5
79.8
115.5
Airflow with LNA, m ³ / h
101.9
69.4
88.7
Airflow with ULNA, m ³ / h
88.7
-
-
Noise level, dB
2.19
9.11
2.19
Noise with LNA, dBA
4.16
9.1
8.13
Noise with ULNA, dBA
8.13
-
-
Static pressure, mm. H 2 0
1.51
0.69
1.51
Static pressure c LNA, mm. H 2 0
1.18
0.42
0.89
Static pressure c ULNA, mm. H 2 0
0.89
-
-
Maximum power, W
0.96
0.48
0.96
Maximum current A
0.08
0.04
0.08
Voltage,
12
12
12
Mean time to failure, h
> 150 000
Price
€ 21.90
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