4" in-line Marine Bilge Air Blower 12V 270CFM Centrifugal Bilge Fan

This fan works very well. It moves a lot of air. Doesn't take up a lot of space. Well built. I installed it with an isolator, and it reduced the sound while running.

If you need or want a inline Blower , That doesn't play around , This is the Machine , easy two wire connection , two hole mounting surfaces , zero problems ! And it most definately will move some air ! I actually bought another one for Both sides of engine ,But , I reversed one , so that it would draw fresh air from one side , and evacuate stale , hot air on the other !

100% satisfied with the purchase. Everything came as described very high quality and will keep them as a future suppler

Works well but is extremely loud. Still a great product.

I got one of these for a homebrew solar powered mini evaporative cooler project. It improved my airflow compared to the smaller 3" 130CFM fan that I had that used 2.5A current, but not sure if I'm getting 270CFM. It more than doubled the current draw to about 6A. I had to beef up my solar and storage battery capacity to ensure I could run this long enough into evening when it gets hot.

Sold as a 4” fan, does not fit 4” duct because it’s actually 4.1”. Misleading description.

I use this in my camper in line with a diesel heater to give the heater a boost and it does fantastic, not exactly what it was designed for but has worked great and never hiccuped

Works ok but I'm not sure of the cfm.