Nu-Calgon 417175 Evap Foam

Very happy to have purchased this product. Only used half a can, give it 24 hours of operational cycling, will apply it again. Major improvement in first application, learning curve for gaing access, getting placement in ways to promote foaming. It clearly is benign, gentle on the exposed surfaces, and appeared to clean anything it touches, rinses really clean. I will keep this on hand. Will become a staple for periodic cleaning an area, which frankly I did not know was possible... as this "should be" portion to annual operation and maintenance.

Great cleaner for your evaporator coils with some residual lemon smell but satisfying results from product as it’s a must with 2 dogs.

Works great. Smells like public restroom.

This stuff works great 1) if you can get to your inside AC coils 2) buy two because you will want two 3) also have spray bottle with water to rinse after first application 4) make sure your evap drain is working well because the black gunk has to go somewhere (I use my shop vac from OUTSIDE to pull thru some water/ vinegar before using this citrus smelling spray/foam)

I can’t speak for others, but the two times I’ve bought this in the last couple of years the spraying has worked for me and the cleaner effen cleans the coils.

This stuff works great. Easy to apply and does exactly what it’s supposed to do. No complaints

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.

I wish this had some sort of an attachment to spray in difficult to reach areas.