A wet esp is employed on exhausts that contain wet, sticky, tarry, tacky or oily particulates. The wet esp is an old eco technology originally designed in the 1920's to control and collect sulfuric acid mist using lead collection tubes. Today, the wet esp is employed on gas streams that include an oily and sticky particulate or gas stream that must be cooled to saturation in order to condense aerosols that were formerly in the gas phase. Due to the different characteristics of the collected precipitate, the mechanical removal systems (rappers and vibrators) in a dry system are not effective.