Question-and-Answer Resource for the Building Energy Modeling Community
Get started with the Help page
Ask Your Question

Revision history [back]

click to hide/show revision 1
initial version

do I need to multiply the outdoor air flow rate according to zone multiplier?

Hi, if one zone need 32 cfm outdoor air, so I set the outdoor flow rate as 32 cfm in PTAC. so if this zone have multiplier 3, do I need to set it as 96 (32*3) cfm?

from this link, I know the Zone multipliers are designed as a “multiplier” for floor area, zone loads, and energy consumed by internal gains during load calculation. The HVAC system size is specified to meet the entire multiplied zone load. But is this 32 cfm included in load calculation? if it include in load caculation, it should be 32cfm, otherwise should be 96, am I correct?

do I need to multiply the outdoor air flow rate according to zone multiplier?

Hi, if If one zone need needs 32 cfm outdoor air, so I air,I set the outdoor flow rate as 32 cfm in PTAC. so if this zone have multiplier 3, do I need to set it as 96 (32*3) cfm?

from this link, I know the Zone multipliers are designed as a “multiplier” for floor area, zone loads, and energy consumed by internal gains during load calculation. The HVAC system size is specified to meet the entire multiplied zone load. But is this 32 cfm included in load calculation? if it include in load caculation, it should be 32cfm, otherwise should be 96, am I correct?

do I need to multiply the outdoor air flow rate according to zone multiplier?

If one zone needs 32 cfm outdoor air,I set the outdoor flow rate as 32 cfm in PTAC. so if this zone have multiplier 3, do I need to set it as 96 (32*3) cfm?

from this link, I know the Zone multipliers are designed as a “multiplier” for floor area, zone loads, and energy consumed by internal gains during load calculation. The HVAC system size is specified to meet the entire multiplied zone load. But is this 32 cfm included in load calculation? if it include in load caculation, it should be 32cfm, otherwise should be 96, am I correct?