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Joined 3 years ago
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Cake day: June 10th, 2023

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  • you do not need any special training or equipment to survive any particular speed (or velocity), like the speed of sound, as long as you get to that speed comfortably.

    you DO need special training and/or equipment to survive extreme G-forces (acceleration). Acceleration says nothing about what your speed/velocity is, only how quickly it’s changing.

    For example, think about astronauts taking off in a rocket. At launch they experience extreme g-forces as the rocket makes them accelerate upwards. But once they reach the orbital or escape velocity they need for their mission the rocket turns off. They stop accelerating and feel no g-forces at all (micro gravity), but they are still cruising along at an extremely high velocity.


  • yeah it’s mainly a benefit in summer.

    In winter it can be beneficial if you also have a heat pump furnace. Otherwise the heat is ultimately coming from gas or resistive heating. That’s not a problem, it’s just not a gain in efficiency in winter. Actually it is slightly more efficient as he explains later in the video.

    The main thing I don’t like about my HPWH is it’s a bit noisy when it’s running.

    edit: I have not had the random cold water issues he said he’s had in the video. I wonder if that’s more of a pressure problem in the hot water line. Assuming he doesn’t take 120-degree showers, if the hot water pauses for a bit, seems like he’d temporarily get only water from the cold water line.