Originally Posted by
axelriet
Not sure if it would make sense plumbing-wise, but you could run the two IC's in parallel with 'Y' ducts instead of one after the other. This should reduce the pressure drop.
Yes that is one way to do it and will mean that both still have a chance to be efficient as both will see hot air.
The downside is the way that the y pipes will hinder flow of course.