I believe Wheaton labs has been working on this concept and I believe I've seen designs on the web, but it does take a *lot* of energy to raise the temperature of water. I've also seen people using a claw style tub raised on blocks and a fire built underneath it. I think that would be both less efficient and much smokier than adapting an RMH.
Mary Combs wrote:Wouldn't this be a great application for a rocket mass heater? I seem to recall seeing a design for a dedicated water heater based on a rocket mass heater.
This is why it would be nice to keep the tub as small and efficient as possible. I would prefer to use the water in a green house and simply dump it every time, rather than have to treat it with chemicals myself. There are concerns about this issue if you try to use solar water heating, as things like Listeriosis which grow nicely at lower temperatures, that are particularly dangerous for seniors. However, I don't see why you can't pre-heat with solar, then get the tub up to pasteurization temperature (I'd have to research how long), then add safe cold water to bring it down to the temp you want. I don't know for sure if that would be safe enough - more research needed!
I would think you would need to use chemicals to keep the water hygienic, or raise the temp to pasteurization temperature and let it cool to tolerable temperature before each use.
Are you saying you fixed the drain pipe, or fixed what I call the "shut off valve" that stops water from getting to the faucet?
Sean Flip wrote:I was about to submit a BB in https://permies.com/wiki/111644/pep-plumbing-hot-water/Fix-Leaky-Faucet-PEP-BB but have a feeling because I fixed the pipe underneath the faucet which was leaking, and not the faucet element itself, someone might decide I didn't fix the faucet. So, does it go to that BB or to an ODDBALL job?
Cécile Stelzer Johnson wrote:I would be tempted to place a stool for seating in the barrel and fill it enough to cover my shoulders. Plumbing and cleaning a barrel like those blue barrels isn't hard, especially if you were to use it outside and could pressure wash it every once in a while.
If kept inside, I'd feel like I would have to hide the horror of a plastic barrel with perhaps some sort of a nice wood decking built around it perhaps a nice metal grab bar to help hoist myself out? or a rope ladder?
Cécile Stelzer Johnson wrote:
The main problem I see is entering and exiting such a contraption.
I have used the deep, but small, Japanese bathtubs. Less surface area helps to keep the water warmer, and having your whole body submerged easily, helped me stay warm even at cooler water or air temperatures. Wet skin cools so much faster than dry skin, that unless I've been in warm water a good long time, my skin will cool very quickly if I can't keep it covered.
I'm all in favor of a tub with a narrower footprint than a conventional bathtub for the simple reason that it could use less hot water. Also, it would make better use of space inside the house.
Nick Boutros wrote:Has anyone done this? Some varieties of duckweed seem like a nutritional dream, especially for vegetarians.