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Hi UnmetHours, Our team has just got a laboratory project that some of its rooms need to be pressurized (positively induced) whereas others are in contrary need to be reduced (negatively induced) by using mechanical ventilation (intake and exhaust fans). Is there any way to simulate this in EPlus? We had tried by utilizing Outdoor Air Unit and Exhaust Fan but it resulted on high number of unmet hours.. Yet our aim is to achieve LEED rating by produce less unmet hours (<300 or so). We've observed EPlus report also and didn't find anything which depicts this positive/negative zone case, any information on this would be appreciated. Sincerely, Ade

Hi UnmetHours, Our team has just got a laboratory project that some of its rooms need to be pressurized (positively induced) whereas others are in contrary need to be reduced (negatively induced) by using mechanical ventilation (intake and exhaust fans). Is there any way to simulate this in EPlus? We had tried by utilizing Outdoor Air Unit and Exhaust Fan but it resulted on high number of unmet hours.. Yet our aim is to achieve LEED rating by produce less unmet hours (<300 or so). We've observed EPlus report also and didn't find anything which depicts this positive/negative zone case, any information on this would be appreciated. Sincerely, Ade

Hi UnmetHours, Our team has just got a laboratory project that some of its rooms need to be pressurized (positively induced) whereas others are in contrary need to be reduced (negatively induced) by using mechanical ventilation (intake and exhaust fans). Is there any way to simulate this in EPlus? We had tried by utilizing Outdoor Air Unit and Exhaust Fan but it resulted on high number of unmet hours.. Yet our aim is to achieve LEED rating by produce less unmet hours (<300 or so). so).

We've observed EPlus report also and didn't find anything which depicts this positive/negative zone case, any information on this would be appreciated. Sincerely, Ade appreciated.