supply of exhaust fanexhaust fan,super-efficient bldc exhaust fan with sweep 250mm, input voltage 140v-285v 50h z ac supply operated 20w, air delivery 1150 cmh, 1200 rpm, double ball bearing incorporated for less noise and longer life, back flaps should be available for insects entry preventing, standards: is 2312-1967 or latest of model atomberg exhaust efficio, othermakes: polycab, usha, luminious, crompton, orient, havells . ] , supply, installation ,testing & commissioning of energy efficient 200 mm sweep bldc exhaus t fan, voltage-230 volt ac, 50 hz, 5 star bee rating, rpm- 1600, air delivery-min 800 cmh, adjustable upwa rd and downward tilt mechanism with oscillation and 3 speeds, wall mounted including all accessories. mak e bajaj, crompton, rr, atomberg [ warranty period: 36 months after the date of delivery ] ] => limited