Right now and all Summer long, regardless the scorching heat and humidity, I run my small 1,400 SF home's central AC 3-ton 14-SEER to keep cool. I have a guage in my kitchen that reads; 41% relative humidity. Extremely comfortable.

Now here's the question.....

One of my Brothers has a small home in Omaha, NE similar SQ. FT. of 1,400 SF. also has a 3-ton AC unit, but is suffering a 96% ambient humidity in the home. He stated that it's cool, but could start raining at any moment. Ha! The unit a Carrier - complete furnace and outside AC unit 1-year old.

Getting the company back out for a re-check has been a challenge. Last year, my Brother related that within a week of it's install, it was similarly very humid in home. Company came back, adjusted something, and it was good for last Summer.

This Summer, guy came out Monday, and said that he thinks the unit is too big for the home, thereby cooling the home too quickly, without removing the humidity from the air.

My Godfather, many years ago put a 6-ton AC unit on his 1,600 SF home in the '70s, because he was big into comfort, but it always felt humid in his home too. Reason? Too much tonnage for the small square feet of home.

What could be going on with my Brother's home? Could the humidifier that operates on the gas portion of the furnace assembly in the Winter, which is also houses the AC be kicking in? How else could an ambient temperature in the 90 percentile range be achieved, even by too much tonnage AC power?

BTW, he has a portable type de-humidfier cranking in the homes basement, that is collecting 1.5 gallons of water every 12 or so hours!