The Dense Flow System differs from competitive models with the absence of air boosters along the pipeline. This system is able to achieve equal or greater results in many instances without the use of boosters. Some of the advantages to not having boosters are: lower air consumption; lower installation costs; less maintenance; less “wear and tear” on the system; less spare parts inventory.J.D.B Dense Flow, Palm Harbor, FL 800-822-3569 www.jdbdenseflow.com