Air coolers are not good for health. Get an AC.
Thats non sense.They bring in fresh air,the humidity levels aren't much as long as you open the windows.If you switch on the air cooler in a enclosed room then it makes matters worst,physically uncomfortable.
As for people suggesting its not good for bangalore,in my living room of 400sqft which doesn't have a AC,it has air cooler it bring the room temperature from 34°C to 28°C in the afternoon,if you put the air cooler in a smaller room of around 170sqft it drops the temperature to 24°C and if you right next to it the temperature is around 16°C all these measurements based on a large desert cooler with advertised cooling capacity of 750sqft .
While the AC in the bedrooms are a lot cooler and quieter ,the power bills will be quiet high if i have to cool larger living rooms.