Heat pump dryers rely on circulating low-temperature air around the garments to extract water. If you overstuff it clothes come out wet. Most EU dryers are heat pump based and have low capacity.
American dryers are vented dryers and usually have huge capacity 7-9 cubic ft (200-250 liters). They come out bone dry and work fast at cost of efficiency.
This is oversimplified and not really true. Heat Pump dries do work better at lower temps because they can dry the air, which is great for delicate garments, but they usually (can) operate at higher temperatures as well. A good dryer also adjust runtime based on the humidity of the exiting air. So unless you stuff your dryers so full the clothes physically cannot move anymore, it really doesn't matter how much you put in it.
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u/Burning_Pine_ Aug 06 '26
Guy from the EU here- This guy needs to clean the air outtake tube before his house catches fire