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I'm trying to model a warehouse (heating-only) in eQuest that uses three blow-thru space heaters. The heaters take 100% outdoor air and are constant volume systems. Does anyone have any experience modelling warehouses and if so, what is the best method to model this scenario? I'm currently using the unit ventilator system because it seems to be the heating-only option that doesn't have a return path (it was also the default from the DD wizard). Does this make the most sense or is there a more viable HVAC option? I have the system's MIN-OUTSIDE-AIR set to 1.0 in an attempt to ensure that the unit only uses outdoor air. I have also modeled exhaust fans at the zone level. Upon checking the SV-A report for the system, it seems the outside air ratio is only 0.35, which can be attributed to the fact that outside air flow has defaulted to the same value as the exhaust flow. Is there any way to keep the system at 100% outdoor air while still accurately modeling the usage of exhaust fans? Is a different system type better suited for this scenario? Any help is greatly appreciated!

I'm trying to model a warehouse (heating-only) in eQuest that uses three blow-thru space heaters. The heaters take 100% outdoor air and are constant volume systems. Does anyone have any experience modelling warehouses and if so, what is the best method to model this scenario? I'm currently using the unit ventilator system because it seems to be the heating-only option that doesn't have a return path (it was also the default from the DD wizard). Does this make the most sense or is there a more viable HVAC option? I have the system's MIN-OUTSIDE-AIR set to 1.0 in an attempt to ensure that the unit only uses outdoor air. I have also modeled exhaust fans at the zone level. Upon checking the SV-A report for the system, it seems the outside air ratio is only 0.35, which can be attributed to the fact that outside air flow has defaulted to the same value as the exhaust flow. Is there any way to keep the system at 100% outdoor air while still accurately modeling the usage of exhaust fans? Is a different system type better suited for this scenario? Any help is greatly appreciated!