I need to decide soon on two new systems: one 3 ton and one four ton. Home is in Miami, FL with approximately 3,900 sq ft under air. I definitely want to go with variable speed air handlers in order to have more humidity control. I was all set to go with the XL20i but then an estimator from a reputable company down here suggested that I save some money and go with the XR15 instead. According to the charts I really wouldn't save that much more money on my electric bill by going with the 20i. My real concern is with humidity control. The guy who suggested the XR15 says that the variable speed air handler is what is going to make the real difference with humidity control. But an estimator from another reputable company told me that I will have much better humidity control if I go with 20i. How much difference is it really going to make between the systems? The price on the XR15 is considerably lower but if I need the 20i for proper humidity control I would be willing to spend the extra money.
Four ton System Model # Condenser 4TTR5048E1000A, Air Handler 4TEE3C09A1000A
Three ton System Model # Condenser 4TTR5036A1000A, Air Handler 4TEE3C03A1000A
Four ton System Model # Condenser 4TTZ0048A1000A, Air Handler 4TEE3C06A1000A
Three ton System Model # Condenser 4TTZ0036A1000A, Air Handler 4TEE3C04A1000A