The tumble dryer is one of the most energy-hungry appliances in the home, consuming an average of around 2,000 Wh per use, and its use adds over €100 a year in costs, nearly 500 kWh of energy consumption, and more than 1,088 kg of CO₂ equivalent emissions annually. Air-drying is the zero-emission alternative: drying clothes outdoors generates no CO₂ whatsoever, and doing so 100% of the time can save up to $2,100 per household over the lifetime of a dryer.