THe a/c has very weak flow of air blowing even with the fan on high. My last carrier had a high volume of air coming out of the vents which was adjusted by the installer as I desire room by room. This installer said the latest carrier units are designed differently and dont allow for adjustments. It takes hours for the house to cool down a few degrees and runs continuously. It only will cool below 74 degrees when the temperature outside is under 77. I have had several installers to look at it. One agreed he never heard of adjusting how much air blows out of the vents. One said i had to rip out all the ductwork and replace it -- said they weren't big enough. Another wanted to replace all the vents. No one seemed to know how or if you can adjust the air flow coming through the vents. My first installed came back three times to adjust the air flow. It was so strong that it was bmoving the prisms on the chandelier. So, what do I do to increase the volume of air blowing so I don't have to run fans to distribute the cool air. Thanks. THe unit is Carrier and is two years old.