You have an air conditioner, right? That air conditioner has an air filter, right? And your air filter is clean...right? Well, it had better be, because air filters are the lungs of the system. If you have an air filter that's old and dirty, your system can't breathe. It will get worse efficiency and eventually break down completely. Don't let that happen to you! Order some new air filters today to make sure your unit can keep breathing and running for years to come.