BACKGROUND: Our house is ~11 yrs old. We have forced hot-air heat/a/c fueled by natural gas.
ISSUE: The master bedroom is the last room in the loop, making it the coldest in the winter and the hottest in the summer. The air that comes out of the vents is barely more than a lukewarm or chilled whisper.
QUESTION: What's the best/most efficient way to equalize the temperature? (We've tried adjusting the vents, to no avail.)