Technical Note


ICR2019 – The Ideal Platform to Take Stock of the Historic K

The 25th International Institute of Refrigeration (IIR) International Congress of Refrigeration (ICR2019) was successfully staged in Montreal, Canada, on August 24–30. JARN participated in the c...


Japanese AC Manufacturers Further Strengthen Technical Capab

According to the Development Bank of Japan (DBJ), domestic capital investment in fiscal year 2019 (end of March 2020) is planned to achieve double-digit growth in both the manufacturing and non-manufa...


Improving Air Quality with RACs

Sei Suma, senior adviser, Japan Air Conditioning, Heating & Refrigeration News (JARN) The main function of air conditioners is to create a comfortable thermal environment by regulating the indo...


Fan Motors and Instrumentation

– The Latest Trends A fan motor, as the name indicates, refers to a motor that drives the fan’s blade. Fans are divided into several types according to factors such as the required air ...


International Conference on Compressors and Their Systems

The 11th biennial International Conference on Compressors and their Systems was organized by the renowned Centre for Compressor Technology and held from September 11–13 at City, University of Lo...


Three Selected Refrigeration Papers Presented at the 18th Eu

From June 6 to 7, 2019, the 18th European Conference–the Latest Technology in Air Conditioning and Refrigeration was held at Politecnico of Milan, Italy. This conference was co-organized by Cent...


Recent Trends of Refrigerants for Mid-and Low-temp Equipment

Here, mid-and low-temperature equipment refers to equipment commonly called air conditioners for comfort cooling as well as refrigeration equipment for the purpose of cooling down to approximately &nd...


All Things Comfort

Sei Suma, senior adviser, Japan Air Conditioning, Heating & Refrigeration News (JARN) For human beings, the temperature environment is an important factor with life and death implications. In 2...


Smart Air Conditioners

Looking back at the history of room air conditioners (RACs), firstly, the integrated window type was invented, followed by the split type that splits the window type into an indoor unit and an outdoor...


Top 5 VRF Components and Technologies

Sei Suma, Senior Advisor, Japan Air Conditioning, Heating & Refrigeration News (JARN) Close to 40 years have passed since the birth of variable refrigerant flow ( VRF) system, which has since g...


ATW Latest Product Trends

Air-to-water (ATW) heat pump signifies an air-source heat pump (ASHP) water heater that warms water by transferring the heat in the air to the water according to the principle of the heat pump. A prot...

U.S. VRF Report