[ W = \fracm_vm_a ]
[ W_mix = \frac\dotm a1 W_1 + \dotm a2 W_2\dotm a1 + \dotm a2 ] humidity ratio psychrometric chart
Given mass flow rates ( \dotm a1 ) and ( \dotm a2 ), the mixed humidity ratio: [ W = \fracm_vm_a ] [ W_mix =