SMACNA

Smacna stands for Sheet Metal and Air Conditioning Contractors' National Association. They are a group of companies who work together to make air conditioners, ducts, and other products made from metal. They have a set of standards and guidelines to help their members work together and make sure their products are of the highest quality. They also help each other by providing training, support and resources such as tools and materials. Smacna is like a big club for companies to join so they can learn from and help each other make good products.