I'd suggest moving them a little bit farther away from the power supply so that it wasn't pulling in the heated exhaust from it. I'd also suggest putting a 2nd fan on both units for a push-pull configuration to help pull heat from the units. Also maybe add a fan to push cooler air into or toward the units that is unless you have an air conditioned room to move them into.
Actually, the blue fans are pulling the heat. Hmm, so then I need to hide the PSU somewhere farther, right? Great, thanks!