#13: Ventless Clothes Dryers
Where is the exhaust hose? Often, there isn’t one. Instead of blowing warm damp air through a duct punched through an exterior wall, condenser and heat-pump machines remove moisture inside the appliance. Water is collected in a tank or sent down a drain, and heat-pump versions recycle warm air through a closed loop. That makes the dryer much easier to place in apartments and compact homes where exterior venting may be impractical.

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