Series M/MH manifolds
Standard steam-jacketed manifolds should be used if you are using the Series 9000/1000 direct-steam-injection humidifiers, and vapor absorption distance is not critical, or is less than 36 inches (91 cm). The size and number of manifolds can be determined by face area of the duct or AHU, capacity, steam pressure, and required absorption distance. Armstrong’s Humid-A-ware Humidification Selection and Sizing software will assist in these calculations.
If you are using multiple manifolds, it would be more economical to use reduced-size units. Maximum capacity of an individual manifold is based on the steam-supply pressure of the system.