I reread your original post. One way to achieve good humidity control is long system runtimes. A system with a variable speed compressor and variable speed air handler, as you indicated you have, will achieve this by running for long periods of time with the compressor at a low speed and the air handler at a low speed. If your system is cycling on and off frequently then it may not be operating correctly (i.e. not running at a low speed most of the time) or it is oversized for your house. On typical summer days, your compressor should be running at a low speed continuously and pop into higher speeds perhaps for a few hours in the afternoon. Have you spoken with your HVAC contractor? Does your house feel more humid than with your previous system?
In a previous house, my system had a two-speed compressor and 10-speed airhandler and it would accurately maintain the relative humidity I set it at (40%) most of the time without resorting to cooling below the temperature set point. There are, of course, limits. For example, on cool days, precisely maintaining a specific humidity will be a challenge.
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Originally Posted by billethkid
We do have variable speed compressor and variable speed furnace and air handler.
We do not have a dehumidifier. Which I will look into.
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