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Old 02-24-2019, 11:02 AM
 
Location: Colorado Springs
2,907 posts, read 1,900,082 times
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My folks had a regular American style hot tub. Maintenance was no different than hot tubs they in other locales. Check it every few days, adjust chemistry, enjoy.

Not sure what you mean by a concrete tub with wood stove. That sounds more like a still.
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Old 02-24-2019, 11:19 AM
 
83 posts, read 12,833 times
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Basically it's something you'd see in European / Asian spas I guess. I didn't realize it's not calle a hot tub if it's not the typical system with jets. The hot stow attached is a low maintenance solution that doesn't use electricity and dead simple to keep it warm - you just need to run through a pipe out at the bottom of the tub, through a heater ( usually a stove ) and inlet at the top of the tub so it's gravity driven although I guess a small pump could be included just in case.

Concrete is weatherproof, you can cover the insides with any sort of tile, artificial stone, etc. so it's my choice for outdoor stuff. Besides in my opinion it looks great.


Mike - your second link is closest to my idea, here's a god example : https://2w2d9x1nx4wttrfpn2kfrgp1-wpe...d-spa-1-MI.jpg


Although the one on the image has jets I simply want one with still hot water just to soak in the cold.
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Old 02-24-2019, 11:58 AM
 
83 posts, read 12,833 times
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Found a better example, this one is perfect -
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Old 02-24-2019, 12:42 PM
 
1,982 posts, read 1,698,925 times
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I have seen wood heated hot tubs that are round here in Colorado. Google it and you will see examples.

I've never seen a concrete version here, and I bet that is because of the extreme cold in the mountains.
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Old 02-24-2019, 12:46 PM
 
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I've seen wooden ones but their maintenance is just to much - you need to soak the wood for days every time when the tub was empty for a while. Concrete just works and pretty much indestructible.

What negative effect would the cold have ? Apart from having to empty the thing after every use so it doesn't end up as a massive ice cube ..
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Old 02-24-2019, 01:14 PM
 
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Quote:
Originally Posted by Hyperviktor View Post
What negative effect would the cold have ? Apart from having to empty the thing after every use so it doesn't end up as a massive ice cube ..
I would guess soil heaving due to frozen soil causes cracking, then water gets in the cracks and freezes, and the cracks widen. That's just a guess though.
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Old 02-24-2019, 06:41 PM
 
363 posts, read 528,389 times
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Try google "R value" of different material. The heat loss from something like a hot tub will depend on the temperature difference between ambient and the water temp and the R value of the insulation.

Example.. open cell to closed cell foam has an R value that ranges from around 3 to 6 per inch.

Concrete.. a google source I easily found shows an R value of .32 to .55 per inch.

Ie, concrete is a poor insulator. You would get roughly 10 times the heat loss from an equivalent thickness compared to a good insulator.

Even a well insulated hot tub (which also needs a well insulated cover) will use a lot of power keeping it warm during the winter in a cold place.

Concrete... my .02.. a bad idea if that is all that is keeping the heat contained.
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Old 02-24-2019, 06:58 PM
 
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It only need to be warm when it's used - I'd have a wood burning stove running when using it otherwise would be kept empty.


I'd think insulation matters for normal hot tubs because they are never drained and keep a constant temperature.


Also, R values that low are for concrete 1" or so, what if it's more like 5" or 10" ? Also, closed cell insulation probably would be used in the foundation but would be possible on the sides too - you can even sandwich it between two layers of concrete.
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Old 02-24-2019, 08:34 PM
 
Location: We_tside PNW (Columbia Gorge) / CO / SA TX / Thailand
21,664 posts, read 38,717,288 times
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let's see... Heating /; maintaining and using a FREE insulated Hot tub with insulated and sealed top... (they are always on freecycle for free for moving them and KEEPING them!)

Vs... warming the mass of an outdoor concrete tank, then keeping it clean (and safe from breaking / cracking in cold climate).

My mom has used her 'free' Colorado Hot-tub for 40+ yrs. Still works great (and is heated!)

Building a concrete HT is NOT free.

I think we have a 12YO here (trying to get points for the most topics created).

Certainly very common for anyone over age 21 to KNOW all this stuff (or at least find it).

Does Dominoes deliver in SLV?
Grubhub (Taco Bell?)
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Old 02-25-2019, 02:45 AM
 
83 posts, read 12,833 times
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Used hot tub sounds pretty disgusting, sorry. And By principle I think nothing should be free - I rather pay for my things and have them the way I want / like then pickup something for ‘free’ - there’s a reason it’s ‘free’.

There were a few people here with friendly helpful answers, rabbit you’re just another one of those who’d rather post an insult than add anything meaningful to the topic. I’m not sure if yoy have read here all posts but have a look at some R value calculations and other stuff and read a bit abot stove heated hot tubs.

Keeping something clean is hardly an issue, people keep their stuff clean but everyone has different standards of course.

What exactly would cause a reinforced concrete structure, even if it’s a small one to break? If you know just detail it please because that could be useful information but if just guessing then that’s not helping anyone.
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