ComStar Coil Safe, External Neutral pH, Non-Toxic, Self-Rinsing Evaporator Coil Cleaner Compatible With Commercial & Residential AC & Refrigeration System Coils, Made In USA, 1 Gallon (90-298), Green

Used this to clean my electronic air cleaner element's for my furnace and the filter for my orik air purifier I bought used years ago. I have never been able to get either clean, I have used dawn and hot water as well as even gave steam cleaning a shot but always had dirt stuck on my filters for my furnace ( these are aluminum so plz do not try to clean paper or any other filter media with this, it is not designed to work on anything else other then metal type filters ), my air purifier filter is also aluminum and when I got it the filter was stained with what I have to assume is tar from cigarettes. I have tried multiple cleaners and none have worked on it either. I put ( in a clean spray bottle ) 1/4 bottle of cleaner with 1/2 bottle of hot water in old windex bottle and sprayed the purifier filter, the junk stuck on there that didn't want to come off, just started running off like using a garden hose to spray mudd off your truck before washing. Side of bottle says to let sit for 5 min after spraying, I let it sit for maybe 2 to see how well it cleaned stuff and then used my shower head to spray the filters down with hot water. I have not seen the dirt run off these filters like this before. I even rinsed the dirt off to start with using the pressure spray on my shower head before spraying the cleaner and I still got double the amount of dirt to come off. When I rinsed the filters the 2nd time, the water rinsed off as much dirt as it did when I first rinsed the filters before spraying them! The air purifier filter, I had chunks coming off of this junk/ tar when I rinsed it. The odor, there is none! I'm serious, there is no odor! This stuff is about as much as the spray calgon I believe is the brand cleaner that claimed to be odorless, but wasn't. This is cheaper and is alot better since there is no fumes or odors!

This stuff is amazing. I was skeptical when I bought it, but damn does it work well.

Works as described, cleaned a 20 year old condenser just fine.

So far so good with those who say it is smelly well yes it’s a cleaner and you should be diluting it with water it says on the bottle 1 part solution up to 5 parts water. It has a windex smell. My coils were not filthy or gunky but it seems to have removed the odor that I was smelling. So in short it works and smells like a cleaner

I got this to help clean the evaporator coil on my de-humidifier that lives in the basement. The thing runs almost non-stop and has been running for 3 years.Per the instructions you can dilute this up to 4 to 1 with water depending on your level of dirt. As my coil was not filthy I went 4 to 1 and sprayed it on with a re-fillable squirt bottle. It seemed to work very well, though I did help it along with a scrub from a very soft nylon brush. It did have a mild smell to it that seemed to be to be a caustic. It was not overwhelming at all, though it might be at full strength.After a good rinse with pure water my coil came out like new. This will be my go to for refrigerators, vehicle condensers, etc. Diluted down a gallon will go a long way making this a great value.

My friend is our AC tech, he recommended this product for the outside unit and it really works great, pleasant scent and easy to use.

This certainly cleans but as others have said I will never clean an ac inside again. It took 3 days to air out the room and I’m still a little worried about the fumes.

Thank God I cleaned my outside a/c coils before the extreme hot weather hit; i can tell the difference!