ALFEN Windows Pvt. Ltd. ALFEN Windows Pvt. Ltd. Windows help to transform the living space comple-tely. Even a single replaced home window could create the magic beyond belief. Imagine a room with low lighting and old framed window, doesn’t it seems uninteresting from outside and inside both. By placing an aluminium sliding window a transi-tion could be created, which would extend the living room to garden outside, allowing space for even celebrations.