water heated air curtain: 1.economic style 2.high efficiency and low cost 3.energy saving 4.easy installation Air curtain: water heated air curtain, stem heated air curtain, electric heated air curtain, various types available! Application to shop, supermarket, waiting room, etc public application. water air curtain: Parameter TypeOutlet wind speed (m/s)air flow rate (m3/h)Noise(dB(A))Water ...