Thanks for the resents toon, Doug. If there are multiple zones with same space category, like corridors at different stories, served by a central zone system, shall the system be defined as multiple-zone system or single-zone system?
This may depend on some specifics. If the air is not recirculated (i.e. there are not returns to the central system), then I'd say this should kind of case should be classified as a 100% outdoor air system and each corridor is a separate zone that must be served. If there are returns to the central system, it's usually appropriate to consider multiple corridors as one single zone system. ASHRAE 62.1 treats spaces as separate breathing zones if they have different occupancy categories, occupant density, zone air distribution effectiveness, or zone primary airflow per unit area. When there are similar corridors in a building served by one system, all these values are all typically the same so it's appropriate to treat multiple corridor zones as one breathing zone and the system should be treated as a single-zone system.
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Thanks Doug! This is super duper helpful
i can't believe this has not blown up more ;) Doug, thank you for posting this!
Very Helpful! Thanks Doug!
Hi, dumb question, for a multizone system, is it necessary to specify each and every zone for the Minimum Indoor Air Quality credit (v4.1)?
Yes - every zone must be listed. Keep in mind, though, that this refers to *ventilation* zones (as defined by ASHRAE 62.1), not thermal zones.
I see that for Multiple zones you input the same value for primary airflow and discharge airflow. What is the difference between these two?
Did you find your answer ? Bcz im trying to know how to find the discharge airflow at first
@@CharbelMasri-ct2xs Any luck finding the answer?
Thanks for the resents toon, Doug. If there are multiple zones with same space category, like corridors at different stories, served by a central zone system, shall the system be defined as multiple-zone system or single-zone system?
This may depend on some specifics. If the air is not recirculated (i.e. there are not returns to the central system), then I'd say this should kind of case should be classified as a 100% outdoor air system and each corridor is a separate zone that must be served.
If there are returns to the central system, it's usually appropriate to consider multiple corridors as one single zone system. ASHRAE 62.1 treats spaces as separate breathing zones if they have different occupancy categories, occupant density, zone air distribution effectiveness, or zone primary airflow per unit area. When there are similar corridors in a building served by one system, all these values are all typically the same so it's appropriate to treat multiple corridor zones as one breathing zone and the system should be treated as a single-zone system.