![]() ![]() I believe it was the gentleman from the Massachusetts Institute of Technology (MIT) who stood at the podium and asked the seminar participants what the correct ACH value should be when designing a laboratory. ![]() I was finally going to get the definitive, end-all answer to the great air changes per hour (ACH) debate. When we approached the portion of the seminar that involved ventilation rates, I leaned forward in my seat with great anticipation. I was at a weeklong laboratory seminar at Harvard University years ago.
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