Hitachi manufactures air conditioners that use different refrigerants, depending on the specific model and its release date. The most common refrigerants used in air conditioners are R-410A (Puron) and R-32. Both of these refrigerants are more environmentally friendly than older refrigerants like R-22, which is being phased out due to its ozone-depleting potential.
R-410A, also known as Puron, is a hydrofluorocarbon (HFC) refrigerant that has been widely used in modern air conditioning systems due to its good cooling efficiency and lower environmental impact compared to older refrigerants.
R-32 is another HFC refrigerant that has gained popularity in recent years as it has an even lower global warming potential (GWP) compared to R-410A. Many manufacturers, including Hitachi, have started transitioning to R-32 refrigerant in their newer air conditioner models to reduce their environmental footprint.
It's important to note that refrigerant usage in air conditioners is subject to change due to evolving environmental regulations and industry standards. For the most up-to-date information on the refrigerant used in a specific Hitachi air conditioner model, I recommend checking the product documentation or contacting Hitachi directly.