Use only gentle-bristled brushes for fiberglass duct board and sheet metallic ducts internally lined with fiberglass. (While flex duct can be cleaned utilizing soft-bristled brushes, it could be far more economical to easily swap available flex duct.) Air handling units must be produced to make sure that maintenance personnel have https://josuewdios.wikitidings.com/6170991/about_duct_cleaning_virginia_beach