Mechanical tube expanding,tight connection between fins and copper pipe to increase heat exchange efficiency. Bright type copper tube thickness: 0.35mm,silverbrazing for elbow. Motor:efficient,low power-consuming,strong windy,Wide-range, low noise,long service time. Model Nominal capacity Heat exchange area Motor heater demensionLxWxH W m©÷ amount Fan diameter mm Air volume m /h power(w) voltage(v) Coil pipe(kw) Water pan(kw) voltage v Low temprature evaporator fin distance£º9mm room temprature£¾-25¡É BFT-GJ7/1.3 2100 15 3 300 3x1831 3x80 380 2x0.9 1.2 220 1630x253x435 BFT-GJ15/2.8 3600 20 2 400 2x4500 2x180 380 3x1.0 1.2 220 1350x34x5535 BFT-GJ22/3.7 4600 30 2 400 2x4500 2x180 380 4x1.0 1.2 220 1712x345x535 BFT-GJ30/5.6 7100 40 2 500 2x6246 2x400 380 5x1.2 1.2 220 1880x345x635