We all continue to struggle with containing “side-to-side” air on the 6500s. We stumbled upon this fix last year in San Jose, CA. The owner reports sufficient air supply with this simple hose and manifold set up.

Cold Air Piped into Cisco 6500s

Is that my dryer exhaust hose?

Here is a little less sophisticated approach on a newer switch at a site in New Jersey.

HP Launches New Air Containment Product