Time is mostly base 60. It goes against the metric system based 10.

It’s like saying milifoot. For 1/1000th of a foot. Doesn’t make it a metric unit.

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Ohh I see now.

Yeah 160° is too hot. But people do it. Small tank multiple showers needed. You can stretch it.

I was saying for people that have their water too hot. The regulator inside the US mixing valve has a stopper so you can’t go to max hot. That’s all the piece inside does, stops you from turning the valve more. Doesn’t help reglate the temperature. Someone in comments said their regulator is bad and I thought it was OP.

It’s definitely a nice upgrade. Little pricey in the states because hardly anyone uses them, so they are “specially”. Not any more difficult to install really but plumber might charge a premium.

In the US the standard safety temperature for the water heater is 120° F

You don’t need it higher than that unless you have a small tank and use a lot of it. Tankless is 120°F.

I don’t know where you got 70°C from.

If you live in the US, then you probably have a standard mixing valve

If you live elsewhere, it’s probably a thermostatic one

For US:

You want to turn your handle all the way hot to clear your hot water lines fast, it’s room temperature in the hot water lines. Once the water is hot, then you start mixing in cold water.

The first cold water is from the lines in your house. It is heated or cooled by your home, basically room temperature water.

So say I turn the valve on full hot. Pure hot water is pouring out. Now you add some of that “room temperature cold water” to get to your perfect temperature.

Now, once you run out of “room temperature cold water,” it will start pulling water from the street.

I’m guessing you live in a cooler climate area?

120°F + 70°F = perfect temperature

But if the outside water becomes, say 50°F after you use all your water stored in your cold water lines

120°F + 50°F = colder water

So you have to add less 50°F water, which means slowly creeping your valve up until you have steady temperature water going to the valve.

Things like the type of water heater matters. If you use a tank then as you use water it adds water. If you keep your tank at 120° and you’re adding 70° cold water or 50° water to the tank matters. You also have “room temperature water” in your cold lines going to your tank at first, then colder water. So that creates another “lag” in temperature

US standard mixing valves aren’t as nice as a thermostatic valve. They are just cheap and standard and work well enough in most places.

Thermostatic valves allow you to select, say 100°F water, and the knob just controls the water flow rate. No matter what, the water that comes out of your shower will be 100°F. As the water coming into your house gets colder it will automatically adjust. As the water from your tank gets colder, it will automatically adjust.

Sounds like your valve is working as intended though

Yes, but this wastes water, so if you’re trying to be green, you should be able to open up the valve to full hot.

Not only does it waste water, your shower will take longer to heat up.

Also, depending on where you live the perfect temperature changes a lot because of outside temperatures. If you use all the room temperature water in your cold lines then start pulling cold water from the outside. You’re going to have to adjust it. Bigger the house, the more the problem.

But if you have to dump out your entire hot and cold lines to even begin to step in the shower, that’s a ton of wasted water.

Answer is a thermostatic valve. It will just use hot water until it needs to mix in cold. If your cold water temperature changes, it will adjust it automatically. You really do pick a temperature to set the valve at, and then the handle just controls the flow rate.

The regular for a standard mixing valve is there only so you can’t turn the valve to burn you. When people keep their water tanks at 160°F, a full turn to the left would be devastating if you’re standing in it.

Would you rather have 2-3 lines with cashiers or 6+ self checkouts?

I would say I would get out of the store way faster doing self checkout. I call that efficient.

Places like Sam’s Club with their Scan and Go checkout. I can scan all my groceries with my phone as I put them into my cart. Then I just walk under an arch with cameras that scans what barcodes it can. Then I walk out the door. I don’t even have to wait in line or go to a self checkout.

Cashiers aren’t efficient

If the company had to pay cashiers, then the prices of goods are just going to go up. Corporate execs and board members want the money.

So, do you let the Corporate execs and board members save money and hope not to raise prices (maybe lower them), or make them pay a cashier so they are going to raise prices.

Even though I hate the “please place the item in the bag!” “Unscaned item in bagging area!”. Self checkouts are efficient, and the future.

8 hous at $15 an hour is $120

Two security cameras. At most $2000

Assuming the register is basically the same price

Do you want to pay a person to stand and scan groceries for 2 weeks for $1200?

Or do you want to spend $1200 on cameras that will last years?

30k+ a year vs. $1200 once

People could steal 29k worth of stuff, and the company would still makes the same profit.

The cameras are basically security theater anyways. No one is ever going to watch the footage unless needed.

The efficiency is definitely there

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