New in our offer

We introduce energy saving windows ECO-ENERGY 78 for those who want to live in warmth and lower heating costs at the same time.
Highly reccomended

For the most demanding Customers we have the windows appropriate to passive houses. There are no compromises with therm insulation of this windows. ECO-PASIV is a line of the “warmest” wooden windows of 92 mm thickness.
Promotions and sales

We encourage to take the opportunity! All products beeing promoted are starling, free of defects with full guarantee. Lower prices are for seasonal or replacing reasons.

The Company NIEŚWIEC

As a family company we function since 1933 and from the very beginning we produce high quality wooden windows and doors. Our windows and doors are made according to european norms and signed with CE mark.
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Wooden windows and doors production technology

The highest production quality standars, experienced workers as well as modern technology is a guarantee that you will get the wooden windows and doors of your dreams.