What are the three types of dryers?

The three types of dryers most commonly referred to in laundry and industrial contexts are vented dryers, condenser dryers, and heat pump dryers, though classifications can vary. Vented dryers are the traditional type that expel hot, moist air through a vent to the outside of the building, they typically dry quickly and have lower upfront cost but require venting and use more energy. Condenser dryers do not require an external vent, instead they condense moisture from hot air into water that collects in a tank or drains away, they are more flexible in placement but use slightly more energy than vented models and can take longer. Heat pump dryers are the most energy-efficient type, they recycle hot air using a heat pump system that dehumidifies and reheats air in a closed loop, they operate at lower temperatures which is gentler on clothes and use significantly less energy but have higher upfront cost and longer drying times. In commercial settings, types might also be categorized as gas versus electric dryers and tumble dryers. Each type has trade-offs in cost, energy use, installation requirements, and drying speed.