We have had a cool spring but that is soon to be over and your air conditioner is probably going to be running a good deal of the time. Do you know how often you should change your air filters?  It is a good idea to change them once a month, when the unit is running often.  Keeping clean filters will help your equipment last longer and reduce dust in your house. Through the cooling season, it is a good idea to mark your calendar and change your filters regularly. It is also important to have your system serviced by a licensed AC contractor at the beginning of each cooling and heating season.  It is a good idea to install an inline HEPA filter.  These filters remove 99.9% of air born particles.  This means that they remove not just dust but also pollen,  VOCs and other harmful pollutants that exist in all homes.  Also HEPA filters typically only need to be cleaned twice a year and should be a part of your regular service agreement.  A little bit of home maintenance will help you stay cool all summer long.