Evap Pow’r is a “no-rinse" product formulated for cleaning indoor evaporator coils. The green-colored, slightly alkaline liquid is metal-safe and therefore will not harm the coil’s metal surfaces when left in contact with them even in a no-rinse application. It cleans and emulsifies the most stubborn soils and deposits, and is biodegradable. It is also NSF A1/K4 Registered for Safe for Food Processing. This is the highly concentrated version of the product and it should be diluted with water at a 3:1 ratio. Evap Pow’r Ultra Concentrate delivers the heavy-duty performance of our Evap Pow’r C product in an ultra-concentrate form. The ultra-concentrate quart reduces space and weight by 75% when storing on your truck or transporting to rooftop or remote coils. Evap Pow’r Ultra Concentrate can be mixed traditionally or used with Nu-Calgon’s Coil Gun at a 10:1 (setting E) dilution.