With a newly developed LCD panel cooling duct, the HC5500 is designed to be one of the quietest projectors in the world at 19 dBa, so you can focus on the movie instead of a distracting hum of the fan.

ENGADGET: Mitsubishi reveals HC5500 1080p projector, other forgettable ones

They soon found that duct tape leaked air so badly much of the cooling and heating was wasted--and that the tape frequently shrunk, dried up or separated.

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