Freeze. Melt. Clean: The Unique "Frost" Technology Keeping Hitachi Air Conditioners Bacteria-Free

Based on extensive global research, we understand that clean air is your top priority. That is why Hitachi developed FrostWash™, a breakthrough self-cleaning technology that keeps the indoor unit pristine and delivers the healthiest airflow for your home.

FrostWash™: Effortlessly Removing Hidden Dirt

While wiping the exterior of an air conditioner is simple, deep-cleaning the interior is a major challenge for non-professionals. FrostWash™ was created to simplify this process, minimizing the buildup of dust, mold, and bacteria on the heat exchanger coil. In fact, FrostWash™ is capable of removing up to 93%^*1 of internal impurities.

How Does FrostWash™ Work?

• Step 1 - Freezing: The unit actively freezes the heat exchanger, "locking" dust and bacteria within a thick layer of frost created from natural moisture.
• Step 2 - Thawing: The frost melts away, causing all trapped impurities to detach completely from the surface of the indoor unit.
• Step 3 - Flushing: The melting frost creates a hygienic flow that flushes dust, mold, and bacteria out through the drainage system.

4 Superior Benefits of FrostWash™

• Bacteria-Free Air, Respiratory Protection: FrostWash™ effectively eliminates up to 99.0%*2 of viruses, 99.0%^*3 of bacteria, and 95%^*4 of mold, ensuring the air you breathe is always pure.
• Eliminate Unpleasant Odors: Musty smells are often caused by internal mold growth. FrostWash™ strikes at the root cause, keeping your room fresh and odor-free.
• Maintains Long-Lasting Cooling Performance: Dust buildup restricts airflow and increases energy consumption. Tests show that Air Conditioners equipped with FrostWash™ maintain airflow performance 3× better than conventional models.^*5
• Save Maintenance Time & Costs: By reducing the frequency of professional servicing, FrostWash™ saves you a significant amount of money and hassle every year.

The Art of Effortless Living with FrostWash™ Self-Cleaning Technology

Hitachi's "The Art of Effortless Living" philosophy is about transforming complex technology into the simplest peace of mind. With FrostWash™, your air conditioner takes care of itself, allowing you to relax and enjoy a pure living space without worrying about dust or germs.

This sense of ease is further enhanced when combined with durable Inverter technology for whisper-quiet operation and optimized energy efficiency, alongside the Mold Guard feature that thoroughly prevents mold growth from within. Most importantly, all our new models utilize eco-friendly R32 refrigerant, creating a perfect harmony of cutting-edge innovation and a light, effortless lifestyle.

Discover the new generation of Hitachi FrostWash™ Air Conditioners here.

Notes:

[1] Used model:RAK-35RPE / RAC-35WPE Tested by Kitasato Research Center of Environmental Science. Test No. 2019_0154: Reduction effects of Bacteria and Mold were observed by operating FrostWash™ once.

[2] Tested by Kitasato Research Center of Environmental Science. Test No. 2020_0650. Test model: RAS-X22K Reduction effects of virus was observed by operating FroshWash™ once.

[3] Tested by Kitasato Research Center of Environmental Science. Test No. 2020_0650. Test model: RAS-X22K Reduction effects of bacteria was observed by operating FroshWash™ once.

[4] Tested by Kitasato Research Center of Environmental Science. Test No. 2020_0650. Test model: RAS-X22K Reduction effects of mold was observed by operating FroshWash™ once.

[5] Two identical units were tested for comparison; with and without FrostWash. Test chamber simulated approx. 2 years of dust and oil build up which may be experienced in a typical home environment. Airflow performance was tested before and after being in the chamber. Unit without FrostWash exerpienced an 18% drop in airflow performance. Unit with FrostWash experienced only 6% performance drop. Tested at Johnson Controls-Hitachi Tochigi factory, Japan Nov/Dec 2021.