When your central air conditioning system starts blowing warm air in the middle of a July heatwave, your first instinct is probably to start researching brands. You search for the highest-rated manufacturers, look up efficiency percentages, and compare warranties. It... Summer brings plenty of sunshine, but it also brings a heavy dose of muggy, sticky air. When this happens, your air conditioner is supposed to be your first line of defense. Aside from cooling down the temperature, an AC system functions to extract excess...