Originally Posted by Saddlebag
Bathing a horse isn't the best thing for it. Millions of good bacteria live on it's skin and bathing removes this. Vacuuming will make the coat clean and it will shine better than with shampooing.
True, but after a hard workout its nice to give them a good hose down. Wash stalls are great for things like a good rinse after a workout, they're good for when you have to cold hose injuries. There are lots of things that they are great for.
I boarded at a barn that had a vacuum built into the two grooming stalls. I freaking loved it and its something I am going to have built into my barn as well.