Dehumidify method is an often missed part for dryer. On heat pump system, it's done by the other end of heat pump. On heater system, it's done by exhausting hot

Dehumidify method is an often missed part for dryer. On heat pump system, it's done by the other end of heat pump. On heater system, it's done by exhausting hot moisty air or use cold water for dehumidify. I don't know what method is used for average dryer in each country.