Does the WM3431HW require an external vent for drying?
No, the WM3431HW uses a ventless condensing drying system and does not require an external venting source. The water extracted from clothes during drying drains through the drum and out the water pump. This makes it suitable for apartments, homes, and spaces where conventional dryer venting is not available.
From the official LG WM3431HW Washing Machine manual, page 2
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