As the name suggests, Aluminium Combination Windows has a mix of more than 1 type of opening mechanisms like fixed, casement, sliding etc. Depending on the need and the usage, the designs can be customised. For e.g. if one plans to install a window AC in a large window then a combination window can be planned where a fixed window opening of the size of the AC unit can left , the left over height can be casement or fixed and the balance width can be sliding.