In line fuses blow like crazy on a 16-inch fan ... I use a fusible link and double relays on mine and it works sweet as can be; no heavy power draw, like when I had a circuit breaker on it, and no fuses blowing, like when I tried an in-line fuse!
Here's My Whole Take On the Subject - Click Here
And if you aren't educated about fusible links, Read This!
54 Chevy Pickup