Hot air curtain is mainly used in factory gates, shopping malls gates, and other places which need to block the outdoor air into the interior space，using centrifugal low noise fan, heat exchanger finned tube aluminum or copper pipe string can be used aluminium, have single warm dual-purpose type and changes in temperature, with beautiful shape, low noise, high winds, installation is convenient wait for a characteristic, the length of the outlet from 1 m, 1.5 m, 2 m, 2.5 m, more outlet need more than one combination. 
It can be divided to type LRM cold hot air curtain machine, type RFM - S hot air curtain,type DRFM  electric heating air curtain, etc.