Nu-Calgon4291-08 Nu-Brite Alkaline Based Coil Cleaner 1 Gallon

Used product on outside unit of A/C, foamed like crazy. Rinsed, and was amazed with the amount of dirt and debris that was flushed out, looks like new. Used on cars too. Most amazing was the result it had on my 10 year old Scion. A/C was adequate before, after a treatment with product it is like a new A/C system. Cold air is impressive even at startup and while traveling , cold air will freeze you out. Also saw on line where after treatment , pressure on high side of A/C was reduced by 50psi. I'm sold on this stuff