... FCC,CCC,TUV,UL,ETL 2. spa heater air blower(1)Feature Air Blower AP series air blowers are first ... the dB(A) value of double impeller air blower is only 2 or 3 points lower than single ... air blower is soft and comfortable. They are the first choice products for hydromassage bathtub and SPA large ... Model, power, voltage (frequency 50/60Hz of air blower’s excitation motor is universal, 220-240V, 110-120 ...