Home saunas and cold plunge tubs cost thousands of dollars, and the pages that sell them rarely agree with each other. This page explains how I handle that: where my numbers come from, how I label them, what I leave out and where the money comes into it. If a page on this site breaks one of these rules, tell me and I will fix it.
I don’t test products. I haven’t sat in these saunas or filled these tubs, and no page here claims otherwise. What I do is read the maker’s product page, spec sheet, warranty and shipping terms, check them against other sellers and public sources, and put the figures side by side. Every figure on this site comes from a page I opened, and where a page didn’t state something I say so.
I’m not a doctor and I’m not an electrician. I don’t make health claims and I don’t give dosing or session advice of my own. When a page touches health, I cite reputable medical sources such as Cleveland Clinic or Harvard Health and send you to your doctor. When a page touches wiring, I report what the maker lists and send you to a licensed electrician.
In order of preference: the manufacturer’s own page or manual, a retailer page that quotes the specs, and government or utility data for things like electricity prices. For health context I use established medical publishers. I don’t use scraped Amazon reviews, forum threads as proof or anything I couldn’t open.
Prices and specs are captured on a stated date and they change, so every page says when I checked. If a page I opened didn’t state a figure, the table says “Not shown” and I leave the cell as it is. I don’t fill gaps from memory or from what a similar product does.
| Label | What it means | Status on this site |
|---|---|---|
| Manufacturer states | A claim from the maker’s page, spec sheet or manual, with the date I captured it. Written as “the maker says” or “the listing shows”. | In use on every page |
| Owners report | What a stated number of owners told me, out of how many I asked. | Not in use yet. I add it only once I have collected real reports. |
| Support test | How the company answered the same questions I send every brand. | Not in use yet |
| Independently measured | Something I measured myself. | Not in use yet |
Right now every page rests on the first label only. That’s a real limit, and it’s why the verdicts on this site are framed as what the paper evidence supports, not as test results.
They do, often, and I show the conflict instead of picking the number I like. Two examples from the site: Renu’s product page for the Vero lists 1,080 watts of cooling power while its own spec sheet lists 580 watts, and one Plunge page showed $5,990 for its tub while another showed $6,790. In both cases the page says so and tells you to ask the seller in writing.
When I derive a number, such as a cost per seat or a monthly electricity bill, I show the formula and the inputs and label it “my arithmetic”. Assumptions that I chose myself, like hours of use per day, are marked as placeholders so you can swap in your own.
I cover products I could verify from a maker or retailer page. I leave out brands whose pages wouldn’t load or that don’t publish the basics, and the page says when I did. Where I give a pick, I give the reason in terms you can check: the circuit it needs, the warranty it lists, the price per seat, the gaps in its documentation. Warranty, electrical requirements and documentation weigh more with me than a long feature list.
Some links on this site earn me a commission when you buy, at no extra cost to you. Those buttons are marked as sponsored and they never set the order of my picks. I don’t take payment for placement and I don’t send products back for approval. The full wording is on the affiliate disclosure page. Product photos belong to their makers and are shown to identify the product.
Prices move, listings go out of stock and makers change specs. Each page carries an “Updated” date, and when I fix an error I change the figure and the date. Write to hello@heatchillguide.com with the page and the number you think is wrong.
You can read about the person behind the site on the about page, or see how this works in practice in my home sauna guide and cold plunge tub guide.