Nominal voltage [volts]
The voltage at which the nominal values
(the table values listed in this catalog) were
determined. The fan operation for DC fans is not
limited to the nominal voltage. Fan speed and
fan performance can vary according to the
admissible voltage range that is specified on the
nameplate of each fan. Please note that this is
not a pulsed or modulated DC voltage.
ebm-papst AC fans are made for operating
frequencies of 50 Hz or 60 Hz. Their technical
data changes accordingly.
Air flow [m3/h, cfm]
The air performance of the fan in free air
operation, i.e. the fan blows into the free space
without static pressure increase.
The fan curves are determined in accordance
with DIN ISO 5801 specifications on a dual-
chamber test stand with intake side
measurement. This measurement technique
closely approximates the operating conditions
experienced in typical applications for fans and
yields realistic performance curves. The curves
apply to an air density of r=1.2 kg/m3
corresponding to an air pressure of 1013 mbar
at 20 °C. Variations in air density affect pressure
generation, but not the flow rate. The pressure
generated at other air densities can be estimat-
ed with the formula
The nominal speed values, air flow and power
consumption listed in the table were measured
in free air operation with horizontal shaft at an
ambient temperature of 20 +5 °C, air density
r=1.2 kg/m3after a warmup period of 5 min.
Optimum operating range
The optimum operating range is always
indicated in the colored area in the air
performance diagrams. In this range the fans
operate best with respect to efficiency and
sound level. Within this optimum operating
range the sound level only fluctuates slightly.
Noise [dB(A), Bel(A)]
1. Sound pressure level – dB(A)
Noise ratings of the fan in free air operation,
i.e. at maximum flow rate.
2. Sound power level 1 Bel(A) = 10 dB(A)
Extent of the overall sound radiation of the fan.
The sound power level is determined in the
optimum operating range.
PAPST Sintec®sleeve bearings
A particularly economical bearing system with
– Very precise, large sintered bearings
– Low running noise
– High service life expectancy
– Resistant to shock and vibration
Precision ball bearings for particularly high
ambient temperatures and high service life
Power consumption [watts]
Input performance of the fan motor when
operating free blowing at nominal voltage.
Depending on the operating condition in the
application, the power consumption may be
Temperature range [°C]
The admissible ambient temperature range
within which the fan can be expected to run
Service life [h]
Service life L10 at 40 °C and Tmax
Standard figures for service life at ebm-papst.
These two temperatures are based on intensive,
in-house endurance tests and on experience
from more than 60 years developing fans.
Life expectancy L10IPC (40 °C)
Information calculated in line with the standard
IPC 9591. Data based on the internal life
expectancy at 70 °C, more optimistically
extrapolated to 40 °C.
We expressly state that none of the
information or data in this catalog is to be
construed as a guarantee or warranty of
Air flow Pressure
1 cfm = 1.7 m3/h 1 Pa = 1x10-5 bar
1 l/s = 3.6 m3/h 1 inch H2O = 249 Pa
1 l/min = 0.06 m3/h 1 mm H2O = 9.81 Pa
Subject to technical changes.
We do not support aerospace applications with our products.
German and international patents (registered designs and
ebm-papst is a registered trademark of ebm-papst
Mulfingen GmbH & Co. KG.
PAPST, SINTEC, VARIOFAN and Vario-Pro are registered
trademarks of ebm-papst St. Georgen GmbH & Co. KG.