I have a carrier weathermaker 8000 58tua furnace. I believe the blower speed for the ac is set incorrect. I have read that you set blower speed to 400 cfm per ton of cooling and I have a 2 ton system. Right now cooling is set to high speed on the blower which is 1195 cfm. Duct noise has always been an issue with both the returns and supply vents. The heat side is currently using the low and med-low, so the only available speed setting on the blower motor is the med-high. According to the installation manual the med-high setting looks to be about 100 cfm less depending on the external static pressure? Is it worth slowing down the blower to the med-high setting? Other than noise is there anything wrong with having the blower speed set so high? If I use the low speed setting for cooling am I going to have to move the wire back and forth between heating and cooling seasons? Also, I am not going to change the blower speed myself because I know the charge on the ac will need to be adjusted. Thanks for you help!