楼主 (北美华人网)
又叫air duct cleanning，就是把空调出口都用吸尘器吸一下，听上去挺有用。我问了一下provicer，有的报价$200，有的报价$600。 刚刚有查到官网：https://www.epa.gov/indoor-air-quality-iaq/should-you-have-air-ducts-your-home-cleaned 上面说“Duct cleaning has never been shown to actually prevent health problems. Neither do studies conclusively demonstrate that particle (e.g., dust) levels in homes increase because of dirty air ducts. This is because much of the dirt in air ducts adheres to duct surfaces and does not necessarily enter the living space.” 所以科学上讲这个好像没啥用，但不知道实际上效果如何。