For institutional, commercial or industrial applications of whole house units, it would be best to consult with Environmental Systems Distributing (ESD) to assure proper sizing and the proper specification of technologies to address your water treatment circumstances. Such applications tend toward either high flow-through or high peak demand usage, or both, and standard calculations for household applications seldom apply.
To discuss your water treatment needs with ESD please feel free to e-mail me at admin@esdwater.com or call 1-304-721-8380 weekdays 9am – 5pm Eastern.