alt Hacker NewsSome US washers don't but many do. However, US washers tend to not heat water as quickly or to as high of a temp. The video cites two reasons: 1. US power being 110V vs 220v. 2. US dishwasher heating elements being limited to 800 or 1000 watts because many are designed to potentially share one 20A residential circuit with an oven and/or fridge due to possibly being retrofitted into a kitchen built before built-in dishwashers were standard and manufacturers not wanting to create different models for retrofit vs new installs.
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in traditional times it was customary to buy a few outfits high quality clothing that would last, and wear the same clothes for a week at a time, and then really boil them clean. This is the European market.
post world war 2 consumer choice culture in the US led to people buying cheaper clothing but varying their outfits every day and cleaning them (with copious availability of water) with less intensity.
once these patterns are established in the market, they become more like customary and it's what consumers expect of their appliances, detergents, etc.
3) manufacturers placing energy star improvement quotas over safety in programming the cycles.
> share one 20A residential circuit
15, dishwasher manufacturers can't assume the dishwasher is on a 20.