FF used to be a small family owned company, so if you needed support it was a simple phone call and you got someone who cares.
The hood is also polycarbonate, so it will outlast the white polyethylene covers on others. I have one on my trailer that I bought in 2004 and swapped it over from my motorhome. It has been in the AZ sun for 12 years now and other than some yellowing of the inside white parts, which I repainted when I moved it to my Trailer, they look and work as new.
I have to admit, they don't seem to move a lot of air, at least it does not feel that way when standing under one blowing in, but if you blow them out, and crack a window next to your face, you do feel the air moving.
On white plastic stuff on RV's, Paint it all with a good UV protected paint, and they will last longer and not yellow as fast. This goes for AC shrouds, outside outlets, plumbing and refer vents, etc.
