EcoCute comes from the Japanese phrase Shizen Reibai Hīto Ponpu Kyūtō-ki (自然冷媒ヒートポンプ給湯機), which literally means "natural refrigerant heat pump water heater"...
Bibcode:1991JChPh..95.5236G. doi:10.1063/1.461831. OKADA, Masaaki (2 December 1995). "代替冷媒の表面張力" [Surface Tension of Alternative Refrigerants]. Trans. of the JAR (in...