Dehumidifier vs AC: Which Controls Humidity Cheaper?

Quick Answer

For humidity control alone, a dehumidifier is significantly cheaper than air conditioning. A 550W dehumidifier costs about $35.64/month at 12 hours daily, while running a window AC unit (1,200W) for 8 hours daily costs $51.84/month. If you need both cooling AND dehumidifying, AC does both at once.