Building HVAC Systems Concepts Animation

http://bit.do/dbvnM 3dMentor secret sale page.
This is an animation I did for my company (Integral Group) showing a few different options for mechanical systems in an office building: conventional, DOAS with radiant panels, chilled beams, and VRF. It's intended to be narrated in a presentation-style format, so it's not supposed to stand alone. All modeling, rendering, animation, and editing was done by me in Blender 2.62 with Cycles. This was my first "real" systems animation... crits welcome but keep in mind IAAENACGA (I am an engineer not a CG artist!)