Hi, I'm reading about 50% relative humidity in my house about 10 kilometers (6.2 miles) away from the sea. How can water vapor from the sea reach me 10 kilometers away? I'm expecting zero or very low relative humidity.. does it mean if you live the ocean, you won't get relative humidity below 40% or 30%? How far from sea before relativity humidity drop to very low value? In a room.. what things can lower the humidity.. can opening electric fan blow the water vapors around the room or away? Thank you!