CHICAGO — Andy Swan didn’t have to worry about standing very long in one spot at the Air-Conditioning, Heating, Refrigerating Exposition (AHR Expo). He wasn’t showing off his company’s new air filter in a booth, he was taking his story to the show attendees.
His company, Hirsh Industries (Des Moines, Iowa), markets a product called Natural Fiber Filters. The filters are made from coconut husk fiber and the company claims they will last six months between changes.