The standard HVAC system has a humidity setting that will work to cool your house to about 3 degrees below the temperature setting when the humidity is too high. This may allow you to save energy by using a higher temperature setting when you are not living in the house. But, it is not a good idea to use it when you are living in the house, because sometimes the house will be too hot or too cold. As stated in another post, a real dehumidifier will include a heater to "reheat" the air after the humidity has been removed by overcooling. This would allow you to control both the temperature and the humidity.
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