Hi again.. Goodman modulating furnace soon to be mated with a 2 stage HP, full communicating system.. In the winter, I open the ducts full in the basement and partly close some of them upstairs. In the summer, I open them all the way upstairs and close them in the basement. If my tech installs and sets me up in the spring / early summer when I have my ducts in "AC mode" should I be concerened in the fall when I switch the ducts to "heat mode" ? I suppose this somewhat depends on fan speeds set at the t-stat? the system can be programmed for fan speeds and profiles for propane heat, and AC... when this HP is installed will there be separate fan speeds/profile settings for propane heat, heat pump, and air conditioning? Thanks, Mike.