DTH250 roof fan, horizontal exhaust

Technical data


The motor controller for the EC motor is supplied in a black box for fixing to the roof vent.

Due to EMC requirements the cable between the EC control and the EC motor must not be elongated.
MODEL    DTH250-4-1EC
Fan data
Max. overall efficiency 48,8 %
ECO measurement set-up (A-D)  C
Efficiency requirements  62, N(2015)
ECO efficiency at optimal operating point 72,4



EC motor with integral VSD
Optimal operating point:
Absorbed power
Total pressure

181 W
1271 m3/h
250 Pa
1635 rpm

Nominal rpm (N) 1635 rpm 
Electric supply (U)   1 x 230 V ~ 50 Hz
Overload protection     Integrated in motor control

Max absorbed current* (I)

1.2 A
Max. absorbed power (P1)**  0.19 kW
Motor output (P2)** 0,18 kW 

Supply (power cable)  -
Length  -

Other data
Weight 21 kg 



  • * I is the maximum absorbed current throughout the control range - or the full load current if this is larger
  • ** P1 is the maximum absorbed power from the mains supply, where P2 is the motor's nominal output.
  • Stated data are for t = 20°C
  • Density = 1.2 kg/m3
  • Gas temperature: min. -12°C, max. +60° C
  • Ambient temperature: Max. +40°C
  • Pressure ratio: < 1,11
  • other points in acc. with EC327/2011 - see product instructions
Capacity diagram



DTH250-4-1EC kapacitetskurve
Dimensional drawing



DTH250 målskitse
Sound data



DTH250 lydkurve


  K[dB(A)]   Kw[dB]
  KwA KpA 125 250  500 1 k 2 k  4 k  8 k 
      I II I II  Hz Hz  Hz Hz Hz 
Lw1  0   8  12 5 2 -4 -10 -17 -23 -33
Lw3 4 -2 2 3 1 0 0 -3 -13 -18
LpA3   -24                  

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