There are numerous different types, most require you have the water go slow, the slower the hotter, But this one is very good. Nonetheless, I have just been in 10-15 Hostels that had cold water because of 10 gallon tanks, not even 40 gallon one as often is used in the USA. I appreciate, that this small Hostel, in the middle of nowhere, had a shower that allow as many people as wanted in turn to take showers. I just took a cold shower in the Dreamhouse Hostel in Kiev, the week before, and was frustrated. I am lucky, normally, I am the first to shower, because I wake at 5:00 am, but when I delayed one day until 8:00 am, the water was cold. I have lived in about 1000 Hotels, and I am always trying my best to inspect the type of water heating systems, it is the smart traveler that always has a hot shower.