extraction fan 1)low noise 2)electricity saving 3)large air volume ,which is an ideal choise for ventilation and sunstroke prevention in occasions such as hotel,metallurgy,machinery,war industry,tobacco,granary, etc. its range temperature between -20°c - 65°c . (NOT recommended used in kitchen) Technical parameters model no.diametervoltagefrequencyspeedwattscapacitynoiseFA-CmmvHzr/minwm³/mindB(A)FA-C-20200 (8'')11050/601400/172030/4010/1345FA-C-20200 (8'')220/24050/601400/172030/4010/1345FA-C-25250 (10'')11050/601400/172060/7522/2648FA-C-25250 (10'')220/24050/601400/172060/7522/2648FA-C-30300 (12'')11050/601400/172080/10030/3550FA-C-30300 (12'')220/24050/601400/172080/10030/3550FA-C-40400 (16'')11050/601400/1720150/18058/6855FA-C-40400 (16'')220/24050/601400/1720150/18058/6855FA-C-50500 (20'')11050/601400/1720370/450110/13060FA-C-50500 (20'')220/24050/601400/1720370/450110/13060