Air channel duct for building air conditioning has two sheets folded to form opposing walls with outwardly folded flanges for fixing

摘要

The channel (1) for building air conditioning is made of single or multiple layer sheet and has two similar bevelled sheets of pre-set lengths, one section forming a channel wall with a defined height. The sheet thickness is smaller than the outer height value for the finished duct. The duct has an outwardly folded fixing strip. A further channel wall has an outer height matching the first.