Hortculture Ventilators

This technique is going to convince you:

extremely safety operated external rotor motor in 2 versions :
available with step-switchable motor (DV 5000) or in Doll EC technology with stageless adjustable motor (DV 5000 EK).
motor protected from humidity, dust and UV-irradiation.
lowest acoustic emissions - also for use in showrooms.
high performance air-throughput by the use of sickle-fin design.
low power consumption trough the use of novel bearing technology in the motor.
protective grid mounted on front of motor and blow-out side according to UW and BG-regulations. simple electrical connection trough the use of serially equipped terminal box.
5-step rotation speed controller for step-switching motor versions or Doll energy-saving controllers for stageless adjustable motor versions. (Doll accessories programme)
casing made of stainless-steel in high gloss finished completion against shadow effects.
equipped as standard attachment eyes.
Very good air allocation trough the use of specially designed air deflectors.
very compact type of construction: length 510 mm, diameter 500 mm.

provides an improved aeration of cultivation and a more homogeneous heat allocation especially in the low-temperature range and in long greenhouses.
improvement of the long range distribution when operating air-heaters and at the same time fewer operating cycles, shorter run time and thereby better utilisation of the energy input .
reduction of cold- and frost-zones in the greenhouse.
better discharging of cultivation plant-air and fewer thermal displacement in vertical direction. improved swirling for pollination. fewer input of pesticides necessary because the systems air-dynamics are preventing from plant-cultivation diseases.
avoiding condenser effects in buildings, on synthetic foil or horticultural glass.