I have an 80 gallon vertical with a 6hp 220v belt drive mounted on a wooden base. Its in my basement, and connects to my garage via 1/2" ID rubber hose to the ceiling of the basement, where 1/2" copper takes it the rest of the way to the garage. Almost zero noise in the garage, or in the first floor of my house above. The wooden base lets the compressor shake a little bit instead of rattling the floor, and the rubber hose de-couples the vibration from the floor joists. I run the a small water separator/filter in the garage, and it rarely ever seems to have any moisture in it. I think the key to the low moisture is temperature- both the basement and the garage are heated. The basement is usually about 60, and I keep the garage at 50 in the winter, outside temp in summer.
1985 Tri-Z 250
1985 ATC250R