The uncorrected outdoor air intake (Vou) flow shall be determined in
accordance with Equation 403.5.3(1). [ASHRAE
62.1:6.2.5.3]
The occupant diversity ratio (D) shall be determined in accordance with Equation 403.5.3(2) to account for variations in population within the ventilation zones served by the system.
Where the system population (Ps) is the total population in the area served by the system.
Exception: Alternative methods to account for occupant diversity shall be permitted, provided that the resulting (Vou) value is not less than that determined in accordance with Equation 403.5.3(1). [ASHRAE 62.1:6.2.5.3.1]
Vou = D Σ all zones (Rp•Pz) + Σ all zones (Ra•Az)
[Equation 403.5.3(1)]
The occupant diversity ratio (D) shall be determined in accordance with Equation 403.5.3(2) to account for variations in population within the ventilation zones served by the system.
D = Ps/Σ all zones Pz
[Equation 403.5.3(2)]
Where the system population (Ps) is the total population in the area served by the system.
Exception: Alternative methods to account for occupant diversity shall be permitted, provided that the resulting (Vou) value is not less than that determined in accordance with Equation 403.5.3(1). [ASHRAE 62.1:6.2.5.3.1]