Just bought a 1999 Terry 725R, when the previous owner was demonstrating its features he said "It has a bathroom fan" as he clicked the button, the fan blade shattered. "I mean, it HAD a bathroom fan....
I also installed a vortex ...yes im frugal! It works much better than the original, was much cheaper than a fantastic fan, was much easier to install than a fantastic fan. HOWEVER, it is much noisier!