Costco has built an extraordinary reputation with consumers. People trust the Costco name, and understandably so. But when you see air duct cleaning advertised through Costco, there is something important to understand: Costco isn't coming to your house to clean your HVAC system. Costco lists air duct cleaning as a member service provided through Stanley Steemer, a third-party service provider. Stanley Steemer's own Boston-area website currently advertises a Costco promotion
