Hi my name is Bengt-Olof Drugge and I was born 29/7 1969.
I have since 1992 worked with develop a fan, who I called the spiralfan.
The fan characterizes of high effenciy and a low sound level.
The unique whith the fan is that the wing are buildt on a spiralgeometry and that
the diffuser is buildt with constant area. The fan is of an radialtype.
A messure of the fan, at StatensProvningInstitut, shows that the effenciy are
90 % and that the sound level are 12db(A) lower than of the today best fans.
If you are intrested to know more you can reach me on
983 31 Malmberget
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Photo:Mikael Söderberg (Majk)