Carrier11
Nathan writes – “Working feverishly at the 2006 Carrier Convention I built a functioning replica of Carrier’s newest air conditioner, complete with the compressor, valves and working fan. It took every hour of both days of the convention, but in the end I was happy with the result. And with that spinning fan, wow, what a breeze!” Thanks Tom! Link.

Related: Blockheads by Bob Parks Lego: the ultimate prototyping material. Seriously. MAKE 02 – Page 36.