Humans have become increasingly adept at mastering our environment. While we may still be miles away from developing a weather dominator as depicted in GI Joe, modern heating and air conditioning systems keep our homes comfortable no matter what mother nature might bring. Here are a few tips to maintain a reliable heating and air conditioning system in your own home. Proper Maintenance Anyone Can Do Like any machine, a heating and air conditioning system requires regular maintenance to work properly. Air filters should be changed on units frequently; experts suggest doing so every three months or whenever the filter…