Our aim is Satisfied Customers

The combined know-how of our worldwide customers is the bedrock to the success of PrefSuite

Some North American users

Some of our European users

With the companies EgoKiefer, Wertbau, Slovaktual and Dobroplast, Arbonia is one of the largest window manufacturers in Europe.
WIŚNIOWSKI means over 25 years of expertise in the construction industry.
Since the beginning of the seventies the name EGE stands for commitment, permanent progress and best quality.
Wicknorm is one of the most important window manufacturers in Austria with the most extensive product range on the market
The Slovak producer Slovaktual convinces with plastic and aluminum windows and doors.
EgoKiefer is the undisputed number one in Switzerland for windows and doors. One of our first customers and a satisfied user to this day.
Richert is the national specialist in the energetic window modernization of large objects in the housing industry.
waku, these are the people who joined forces more than 40 years ago to make windows and doors together.
The Polish producer Oknoplast is one of the most established window brands in Europe and a long-standing PrefSuite user.
Behind HSF stands with IFN Holding not only the largest window producer in Europe, but also the use of PrefSuite.
A family business with strong roots. 27 years of window construction in Germany and many years of trust in PrefSuite.
Fenstertechnik brand GmbH is one of the most modern window and door plants in Europe. We are proud of the confidence in PrefSuite.
From profile production to product delivery: Dobroplast offers an attractive range of PVC windows and doors.
Wertbau is one of the leading manufacturers of high-quality windows and entrance doors in Germany.
As one of the leading manufacturers of windows and doors in Northern Germany, Baltic has been experiencing technical innovation for more than 30 years.
The Belgian window and door specialist is a certified PrefSuite customer. PVC, aluminum and shading are manufactured with PrefSuite