This guide comprehensively explains how to select a suitable air duct cleaning machine supplier. It emphasizes the importance of considering factors like equipment cost ($3,000-$5,000), machine features (suction power, portability, noise levels), supplier reputation, and customer service. The text also covers evaluating machine performance, comparing suppliers, and understanding business needs to make an informed purchase decision. Furthermore, it addresses maintenance, industry trends, and the advantages of buying versus renting equipment. Finally, it offers resources and FAQs to aid in the decision-making process.