The GreenTech idea reflects a simple but clear philosophy that goes back to our company principle: "Each new product that we develop has to be better than its predecessor in terms of economy and ecology."

And that is not always an easy task when you have more than 14,500 different products in your range. And yet our colleagues all round the world have been thinking and acting in accordance with this principle for decades – even before the word "ecology" became a catchword crossing the boundaries between generations. Year after year, they input a great deal of knowhow, commitment and great inventiveness to redefine standards with ever more powerful and efficient motors and fans that raise the bar ever higher, step by step, often even in giant leaps.