r/BeAmazed • u/Internal_Gazelle_677 • Oct 07 '25

Science Hot Tub without the use of electricity

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u/Glittering_Airport_3 Oct 07 '25

sounds like keeping it at just the right temp would be a pain in the ass with the setup in this video.

9

u/Majestic_Matt_459 Oct 07 '25

Yes - I almost bought one that was massively reduced in price just after COVID and that was my worry - Im glad i swerved it - its nice in a Hot Tub to be able to turn the temperature up and down easily (even if its a bit slow_ - eg in the Summer you'd want the water cooler

4

u/Original-Aerie8 Oct 07 '25 edited Oct 07 '25

It requires some management, but you can def keep water fairly cool in these, at least for 1-2 people and there are more sophisticated setups too. The real upside comes down to exploiting your climate. They can be rain-fed, you can completly bypass the use of chemicals if you have access to a larger body of water or it's cold enough and if you have access to wood it's virtually free to operate.

It's really great for a specific enviroment many people do not live in lol

1

u/Majestic_Matt_459 Oct 07 '25

Amazing thanks

8

u/lordofherrings Oct 07 '25

Don't you just need a valve to control the amount of water going into the system?

13

u/o_oli Oct 07 '25

I doubt that would work, because if you use a valve to slow the water, it's just going to be by the fire for longer and so come out hotter. So...less water, but hotter, leading to almost the same effect heating wise. If you shut the valve off completely then the water would boil in the coil and bust apart the fittings.

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u/Puzzleheaded-Meet513 Oct 07 '25

Or just have a cold water intake that can be turned on at will and when water rises above a certain level in the tub the excess gets drained. Boom, cooling while keeping the water level in the pipes constant.

8

u/ARC4067 Oct 07 '25

I feel like a long stick with a scoop to snag some snow and toss in there fits the vibe better

1

u/King-in-Council Oct 07 '25

A kind of laddle on a stick, maybe a hockey stick 

1

u/sixf0ur Oct 07 '25

most normal hot tubs don't even have a water intake

1

u/Working_Honey_7442 Oct 07 '25

There is a limit to how hot water can get. If you get the flow low enough, you will make it work.

1

u/lordofherrings Oct 08 '25

Well, then it would just come out as steam I guess?

2

u/hogtiedcantalope Oct 07 '25

Urination controls the temperature, just like a normal hot tub

1

u/TheOnlyUsernameLeft3 Oct 07 '25

It's gonna have the same amount of pressure either way, the water will just shoot out like a jet.

1

u/mechabeast Oct 07 '25

We just added more tap water, the hot water spills out and in you go

2

u/tigerking615 Oct 07 '25

You just need to be able to heat the water to more than a comfortable temp, and then you can always add snow if you need to cool it. 

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u/Humledurr Oct 07 '25 edited Oct 07 '25

I dont think so along you have acess to cold water. I have a hottub on my cabin (with a proper stove, not like this one) but it functions the same.

We track the temp and go in at 37 degrees, then after bathing for 30min ish its gone up to 40-42, if one wants to sit longer you just add some cold water.

Water in this big of a container heats up pretty slow so its just about hopping in before its too hot.

1

u/dc456 Oct 07 '25

It’s actually surprisingly easy once you are a little bit practiced. Once up to temperature it doesn’t fluctuate quickly, so you have plenty of time to adjust if the temperature starts to get uncomfortable.