Nu-Calgon417175 Evap Foam

I hadn't cleaned the inside coils of my window AC in years. This dissolved years of filth. Quick spray with the hose, and my ten year old window ac works like new! Good buy!

Looks brand new again! This product is amazing!

Used an entire can cleaning an LG window unit. Followed instructions, which I didn't feel were completely clear. "The foam will break and condensation will completely rinse the emulsified material". Condensation from the coil? So if the unit hasn't been running and the coils are dry, once it's back in service, the condensation will subsequently rinse it? So I should return it to service at what point?I cleaned the unit 4 times, trying different ways, including a spray bottle set to a stream. It does rinse out the coils, but only about 3/16" (5mm) deep. The coils are much deeper and the foam doesn't seem to get in there. I tried one of the cycles with the unit on a fan setting to help suck it in and it only made a slight difference. The instructions talk about wiping the coil, but that's only going to get the very surface, not any grime or deposits that are deeper and you risk bending the vanes (very bad thing to do).It did help with the musty smell, so in that respect it work, but it didn't clean the coils as deep as I would like. The best way is probably to use a pump sprayer (like one of those 1 gallon models used for apply insecticides in the garden, etc) with something that will remove deposits but not damage the aluminum. Some people recommend Simple Green and then rinsing it with water, other people say that will damage the coils. I have no idea.TLDR version: It works, doesn't clean as deep into the coils as I'd like.

I have two Midea 8000 BTU window air conditioning units I purchased way back in June 2022.The first one I got worked so well I bought and installed a second unit, when my rooftop 3 ton unit did the same old conk out during a heatwave that summer.Needless to say I take very good care of both units, and try to keep them in tip top working condition. I do not want to be with out AC again.Even with that good maintenance, both units seemed to be struggling just a bit and I read about deep cleaning (not just rinsing with a hose and scrubbing with a brush) the evaporator, and condenser coils as part of the routine.I found this item, and after reading the reviews, and watching the videos, and thought I would try Nu-Calgon 417175 Evap Foam. Purchased Jun 28, 2024 Size: 1.13 Pound (Pack of 1).It took me a bit, although not long to figure out, you need to keep shaking the can to keep it foaming.Example: Shake the can, spray a section of the coil, shake the can, spray another section of the coil, and so on like that until the entire coil was coated. I also got a couple of paper towels to keep my hands clean.It says it can be left on, but having never used Nu-Calgon 417175 Evap Foam before, I thought I would rinse it off anyway. After an hour or so, I got the brush and scrubbed the coils. Then I used a two gallon pump up gardening sprayer with plain water for the rinsing part.Even though previously I washed and used a brush on the coils yearly, the amount of dirt that evaded my efforts was... well, almost shameful. Nu-Calgon 417175 Evap Foam removed stuff I didn't even know was there. The rinse catch bucket was proof enough... ack!Call me nuts, but I like the scent. It didn't bother me at all.Currently we are in the midst of a nasty brutal heatwave this year, but you wouldn't know it in the house because both AC units are running as if they were new, out-of-the-box. This product works, you may want to give it a try.Thanks Nu-Calgon 417175 Evap Foam for helping me keep those AC units clean!

Great

Great for its intended purpose.

The Nu-Calgon 4171-75 Evap Foam No Rinse Evaporator Coil Cleaner is a powerful and convenient solution for maintaining your HVAC system. This 18-ounce spray quickly dissolves dirt, grease, and debris from evaporator coils, improving efficiency and airflow. The no-rinse formula saves time and hassle, as it simply drains away during normal system operation. Plus, the pleasant citrus scent leaves your space smelling fresh after cleaning. It’s a reliable and easy-to-use product for DIY maintenance or professional use.Pros:1. No Rinse Needed: Saves time by eliminating the need for rinsing.2. Effective Cleaning: Dissolves grease, grime, and debris effortlessly.3. Improves Efficiency: Helps enhance airflow and system performance.4. Pleasant Scent: Citrus aroma masks the usual chemical smell.5. Easy to Use: Spray-on formula simplifies application.Cons:1. Aerosol Spray Limitations: Requires proper ventilation during use.2. Not for All Coils: Check compatibility with your specific HVAC system before use.This coil cleaner is an excellent choice for keeping your HVAC system running smoothly. Its effective cleaning power and easy application make it a great tool for both professionals and DIY enthusiasts.

Make sure you have a needle to clean out the nozzle every 3 seconds of spraying. The nozzle would clog and it was incredibly frustrating!