supply of isi marked propeller type ventilating fans(exhaust fans)isi marked propeller type ventilating fans(exhaust fans),isi marked propeller type ventilating fans(exhaust fans)4-pole,450mm suitable for single phase ac 230 volts,50hz,capacitor run,confirming to is:2312/1967 (reaffirmed2005),complete with mounting ring with four number fixing holes,without regulator and lou ver shuters. capacitor shall be isi marked and duly type tested.specification for accessories for propeller type ventilating fans(exha ust fans) shall be as per general technical requirements. [ warranty period: 30 months after the date of delivery ] [quantity tolerance (+/-): 5 %age , item category : normal , total po value variation permitted: max 8 lacs ] ]