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Edited December 3, 2022
at 06:59 PM
by
Walmart has a number of their inflatable hot tubs on sale. This appears to be the largest model. 5-7 person (probably 4 normal fat Americans like myself) 314 gallon capacity. 85" diameter, 28" deep. The smaller ones are 177 gallons (71" x 26") by comparison.
If you have the space, this model seems pretty awesome for this price.
Double the price, double the volume, double the people. Your call.
https://www.walmart.com/ip/Colema...hbdg=L1100
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Hence, you leave them running all the time.
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I have a Saluspa version (77 inches), and it also has a timer that you can set to heat up to 104 degrees (provided you are running the heater/filter 24/7). I have tried both ways, leaving it set at 104 degrees or it at 98-100 degrees with the timer set to warm to 104 degrees 4-6 hours before I get in, and both seem to cost the same a month, about 50-75$ dollars in electricity. This is running it from September to December outside and covered, with temps getting as low as 32 degrees, so your location may be ymmv.
I watched a pile of YouTube videos. There's a dude in Canada that just put a layer of r-10 foam under it, and a layer on top, and it draws 400watts per hour OUTSIDE. We're going to insulate the same way, but mines going in the basement over the winter, and outside on the deck in the summer.
Surface area is not double though.
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area being proportional to the square of the diameter, (85.04/71)^2=1.43, so the difference between the two is 43%.
As the volume of the water cylinder is the area times height, for this is 27.95, the other's being 26, total volume ratio is 1.54, so a difference of 54%.
Again correct, the OP has overestimated the doubling of the volume. Also, the costs don't double, but add a ~40-50%.
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Basement?? What about all the water vapor and humidity it would generateโฆ?
It's an unfinished cement floor with drains and a sump pump. If anything, it'll help my heat exchanger on my heat pump water heater ๐.
From what I've seen in reviews these work well into the 20's for sure, just draw a ton of electricity unless you insulate them a little better with polystyrene underneath and on top. A guy on YouTube in Canada insulated his and uses 9kw a day ~$1.50 but I've also heard of people who use them a ton and don't insulate can see $75-$100 increase in their electric bills.
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