What is the ventilation fan standard for unconditioned zones according to ASHRAE 90.1?
I think this post asked something similar, but let me ask again.
What is the ventilation fan standard for unconditioned zones according to ASHRAE 90.1?
For conditioned zones, Appendix G sets standards for baseline models according to HVAC system, but I can't find the standard for unconditioned zones such as storage, plant room, restroom, etc. If there is no standard, how should we set the fan delta pressures of the baseline ventilation fans in such unconditioned zones? The answer to this question, i.e. to model it as system 3 or system 4, does not seem reasonable to me.
P.S.
G3.1.1-e in 90.1-2016 and 2019 states as follows:
Can I apply this requirement to storage rooms, electrical/mechanical rooms and restrooms without cooling and heating? If so, the system fan power can be calculated by the following formula:
Fan Pressure Rise[Pa] results in 656.664 x Fan Total Efficiency.
If this Fan Pressure Rise represents the System Fan Pressure Rise including both supply fan and exhaust fan, it seems to be a strict standard compared to other HVAC Systems such as Systems 3 through 8. When For example, when the proposed case has a supply fan and an exhaust fan in a mechanical room room, each have with 300Pa, the System Fan Pressure Rise can easily reach 600Pa. We cannot expect energy reduction of fan power in mechanical rooms.