nostr:npub1yrlmnr0y2ch5ycn38j2navyduf5q6tqyd0led3p7xhwmzwcrlsaq558gpm nostr:npub12atwfrq4rfv7fqara6gzsgrgj7k8ngewzl5nzs46agwyxzh0e25qxlme5y My rule of thumb is that if there's a real duct (vs mounting the 5015s so the exit basically points the right way, possibly with the need for a single easy curve that doesn't reduce cross section significantly), it's very suboptimal.