>"Heating the equivalent of 1 gallon of water from -60°F to a reasonable liquid distribution temperature (50°F) means heating it up by a whopping 110°F. That’s 268 watt-hours of raw energy required just to bring a single gallon of water up to distribution temperature!
This is one of the reasons we’re restricted to two-minute showers."
Everyone reading this should try to get by on a two-minute shower once a day for one week, to see if we could be candidates for this job.
This is pretty typical aboard ship for smaller vessels on long voyages. Not so hard as it sounds: get wet, turn off; lather up, rinse off, turn off. You can do with 20-30 seconds of water and be quite clean, with some practice.
It's not satisfying though. And I can't imagine how those numbers scale if you have long hair, or use conditioner.
I lived for 3 years in a motorhome roaming around the US, taking a navy shower about every other day -- usually after an exhausting hike, run or maintenance work. It was a delight, every single time.
Daily full-body bathing is unnecessary unless you do very physically demanding or dusty/dirty work.
Admittedly, Colorado "cold" is not Antarctica "cold". Just saying that 2m is plenty of time for a shower if you're not luxuriating in world of steam and shower thoughts.