We recently purchased a Trane 16XLi with a variable speed air handler. According to their ads, the unit has the ability to remove up to 24 gals. Of moisture per day. With the temp. set at 75 degrees, the humidity is running at a minimum of 55% at night and 57%-61% during the day. I've read that 45% is ideal for the home.

The only way I can get the humidity down below 50% is to run the unit at 68 degrees. No way. What's going on?

Thanks.

Talk to your installing contractor about increasing the temperature differential between the first and second stage settings in your thermostat. The more the system runs the more humidity it will remove, so by running on a single stage(low cool) most of the time it would run longer, Mike

We recently purchased a Trane 16XLi with a variable speed air handler. According to their ads, the unit has the ability to remove up to 24 gals. of moisture per day. With the temp. set at 75 degrees, the humidity is running at a minumum of 55% at night and 57%-61% during the day. I've read that 45% is ideal for the home.

The only way I can get the humidity down below 50% is to run the unit at 68 degrees. No way. What's going on?

Thanks.
I forgot to mention that we have a Trane 803 thermostat with dehumidity control. Isn't that what this option is supposed to do?

Yes , but the settings have to be adjusted during the advanced setup by the installer,

Where do you live? If it is in a humid climate, leakage from windows and doors could be keeping the humidity high.

I live in northwest Arkansas but our house is well insulated----windows, attic, doors, etc. We've done everything we can to make it energy efficient. Outside RH is 67%.

Thanks for the replys.

Will ask the installer to try adjusting the settings.