Because lots of dust can cake on the inside of ducts, firms use a variety of methods — a rotary brush or compressed air nozzles, for example — to shake it loose. Many duct-cleaning companies ...

cobras 6 duct cleaner equipment, air compressors, rotary brush cleaning devices,” Medel said. “You're looking at your base pack and basic equipment anywhere from close to $13,000 to up to about ...

He covers sheet metal, mechanical contractors, duct cleaning, testing and balancing, steel, building information modeling (BIM) and architecture, engineering and construction (AEC). Prior to joining ...