If you’re lucky, your chuveiro looks something like this in Brazil. I say lucky because you see little wiring, but in most situations I’ve encountered the wiring is showing. I’ve had chuveiros explode on me (think sparks and smoke) more than once and what that means is no more hot water until it’s fixed. There’s a work-around for that, though, and it’s called taking a bath with a pot of warm water from the stove. Surprisingly, I really don’t mind this method and it uses much less water. To be clear, in the year and a half (over the years) in total that I’ve been in Brazil, I only had the shower head at one location explode repeatedly and I blame the older building’s wiring. On the other hand, sometimes it explodes (or simply stops giving you hot water) because the breaker in the breaker box doesn’t have sufficient voltage to power the shower head to give you hot water.
Shower head’s here also have a switch with three settings on them (winter, off, summer) which I believe means, for example, that you choose ‘winter’ if you are in the winter season and therefore want hot water. I’ve been places where this was reversed (read: confusing) or, due to unfamiliarity, where you think you should switch it to the season you are in. Where I live now, both winter and summer means really hot water and off, well, that means really cold water. I sometimes alternate in order to catch a few moments of lukewarm water for rinsing off shampoo. Important to note that when you switch from one setting to the other, you have to turn off the shower first, then switch it, then turn it back on…otherwise you run the risk of getting shocked.
This is a normal shower head in the US. Nothin’ special. Knobs lower down allow for deciding the combination of hot water vs. cold water needed. There’s a little wait involved to get it just right but other than that, it’s pretty straight forward. The only time you’ll have to take a cold shower is if the pilot light in the furnace went out and you don’t know how to light it again.