What we do not do
We do not own these tubs. We have not filled them, sat in them, or run them through a winter. Nobody on this site has. If a page ever says a product was tested, it will name who tested it and for how long.
We also do not accept free units in exchange for a good review, and no brand sees a page before it goes live.
What we do instead
Every pick starts from five sources.
- Spec sheets. Capacity, size, weight, material, power draw and rated temperature. We pull these from the listing and the manufacturer, and we note when the two disagree.
- Manuals and setup docs. These tell you what the sales page does not, like whether a chiller needs its own circuit or how often a filter has to be changed.
- Warranty and return terms. A one year warranty on a $2,000 tub is a different purchase than a five year one. We read the fine print, including what voids it.
- Owner reports. We read through verified reviews looking for the same complaint said three different ways. One angry review is noise. Thirty people reporting the same seam failure is a finding.
- Price history. We track what a product actually sells for over time, not just today's number.
How we pick winners
We do not rank one to ten. Every product on a list wins one specific job, because the best tub for a 6 foot 4 athlete is not the best tub for someone with a small balcony.
A product only makes a list if we can name a real person it suits better than anything else on that page. If we cannot, it comes off.
Where this falls short
Desk research cannot tell you how a tub feels after six months, whether a seam creeps, or how loud a chiller is at 6am. We flag those gaps on every review in a box that says what we could not check.
For a purchase over about $1,000, use this site to build your shortlist, then go sit in one at a local studio or gym before you commit.
Why we do not show prices
Prices on these products move weekly. Rather than print a number that goes stale, we show a price range and send you to the live listing. That way what you see is what you pay.
When we update
We recheck specs and links on a rolling basis and stamp every page with the date it was last checked. If a product is discontinued we pull it from the lists rather than leave a dead link behind.
Tell us when we get it wrong
If you own one of these and our write-up does not match your experience, we want to hear it. Corrections make the next reader's decision better.