> share one 20A residential circuit

15, dishwasher manufacturers can't assume the dishwasher is on a 20.

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.

Not true. Dishwashers get cold very often.

The problem is that the first few litres of the water coming from the hot water pipe may be cold or warm. Therefore adding a resistive element is a better solution to guarantee a specific temperature.

Gas (especially just in time) still works well for water heating even if you can use heat pumps for everything else. No sure when that will flip, I assume it will eventually.

The video explains that dishwashers sold in 110V countries often has a hot water connection as it's too slow heating water off a 110V/10A circuit so it is more efficent to utilise the hot water pipes. However we live in NZ, a 230V country so we get dishwashers that can heat water from cold fine off a 230V/10A circuit so no need for a hot water connection.

If you check the manual you might find that you can hook the single inlet pipe up to the hot water tap.

My parents used to have an old cooker which rather than having a spark button, had individual pilot lights for all of the hob burners and the grill. My mother was forever worried about whether one of the damn things had gone out (which they occasionally did). I think if you switched the supply off, switched it on again, and someone has left their house for a week, it might build up a significant amount of gas. Although they are supposed to be small enough not to. Presumably there were hardly any of those left now, but they can't assume they're all gone.

>Whenever natural gas supply is turned off in the US, for any reason, only the gas company can turn it back on

I had a seismic shutoff installed at my gas meter and the plumber who installed it had no problem turning off the gas and turning it back on when he was done. (and then turning it off again to demonstrate to me how it worked).

He re-lit the water heater pilot light before he left. The gas company was not involved at all.

> And this is how I ended up showering at work for three days that week after not having had one over the weekend.

I discovered the unexpected value of a YMCA membership when my hot water was offline for a while.

As an American expat, I will use this story to explain some of the indignities of living in America. Thank you for sharing.

> Whenever natural gas supply is turned off in the US, for any reason, only the gas company can turn it back on

Doesn't match my experience. My colleagues and I are able to turn on or off the gas supply to our houses at will.

Sorry how is this story relevant?

Most of the new ones (at least higher end ones?) have heat pumps that heat water and handle drying. They are efficient enough to work on 110V, and the trade off is longer cycle times. Bonus: no more plastic utensils melting because they fell to the bottom resistive heating elements.

Also, I’m way too lazy to look it up right now, but I’m quite certain I’ve heard of dishwashers that run the hot water for a little bit before letting it fill the basin. Like, I’m pretty sure this sort of thing is commonplace.

It’s not like the engineers for heaterless dishwashers are just too stupid to realize there’s an obvious workaround for having to purge the line before filling the basin. Especially when the performance is so much measurably better when you do it.

Like I said though, it’s a guess. It’s also possible efficiency certifications ding you for the excess water use.

Hot water from the house supply isn't that hot though? My dishwasher gets MUCH hotter than the hot water supply... and I don't think the heater is "tiny" I think it's a rather substantial element. The dishwasher also doesn't need to heat up a "bulk" amount of water, just the amount of water used for washing the current load of dishes.