Nu-Calgon 417175 Evap Foam

Very happy. Great product, I used it on my mini split unit on the indoor condenser head. Used it in the coil and sprayed the fan blades that were clogged with dust. Has a high pressure small stream that blew off everything on coils, foamed up, and dragged it down to pan, used water from there to send it out the drain tube. Then used it on the fan blades to clean them off and then sprayed water from a squirt bottle to drain off onto a towel below. Well worth it. Spent about 20 minutes on the process and used the can up.

I never thought about cleaning the coils of an AC unit or heat pump until I owned an RV. I learned the hard way that not cleaning your coils dramatically drops the efficiency of your cooling unit and also retains moisture, increasing the chance for pinhole leaks of your cooling system and the need for (expensive) unit replacement. This foam does a great job of cleaning grunge off the cooling fins around your coils. You can either rinse with water (if outdoors) or let everything air dry without rinsing. It's not super-cheap, but it's easy to use and makes a potentially tedious task quick and easy. Recommended!

Using this clean the car evaporator and it's pretty effective. Easy to use too. It'd be great if it includes a extension straw cuz my car's evaporator is hidden behind the cabin air filter under the center console and I'm not sure if it did spray into the far side of the evaporator.The chemical smell other reviewer mentioned looks to be normal as I used other brand before. Just need to turn off cabin ventilation only to ventilate the smell overnight.

Works great, used on evaporator and condenser. Thorough wash on condenser, just spray on evaporator. Doesn't smell like a harsh chemical, left the house smelling clean and fresh.

Works amazing, used on rv air conditioner. I've been cleaning the condenser with a hose twice a year for years. Used this product and it's never been cleaner. Took 2 applications and super easy to do. My only gripe is that one of the cans ran out of aresol before it was even half used, but I'm sure that's a fluke. Would recommend.

I'm really impressed with this item! From the moment I unboxed it, I could tell it was well-made and designed with the user in mind. Setup was straightforward and quick, which is always a huge plus.In terms of performance, it has consistently exceeded my expectations. It does exactly what it's supposed to do, and it does it reliably and efficiently. I've been using it regularly for a while now, and it still feels as good as new.What I particularly appreciate is its ease of use. The features are intuitive, and I didn't need to consult a manual to figure things out. It truly makes my life easier.Overall, this has been an excellent purchase, and I genuinely feel it offers great value for the price. If you're looking for a dependable and high-quality item that delivers on its promises, you won't be disappointed with this one.

Saved me so much money!! I was not getting airflow and my coils were freezing. I checked inside the panel and the top of the V looked fine. I pulled out the bottom where the board is and shined a flashlight up. The bottom of the V was caked!! I was not able to reach with any brush or tools. HVAC guy would have pulled the coils and cleaned it. As a last ditch effort i sprayed the top, let it sit and then sprayed water through the top. It took a few rounds, but the bottom is now clean as can be. Air is flowing and no more freezing!!!

Doesn't foam much at all, and it seems to be a defect with the can nozzle not working right not so much the liquid inside. You will need two cans for most large a/c units at least