Experimental musician Andrew Huang (previously at Neatorama) made a song out of the whistles, clangs, and growls that the radiant heating system in his building makes. Oh yeah, he also collected sounds from another building to round out the collection of tones he had to work with.
This is not the first music made with the weird sounds that buildings make. Who could forget this awesome Triple Concerto for Faucet, Water Pipes, and Fiddle? -via Tastefully Offensive