David Maus Jr. Reviews the Inergize Spire Elite: "This Is Actually Sick"

Updated August 2026 · By the Inergize team

When YouTube's most trusted cold plunge reviewer agrees to test a tub that nobody outside the factory has seen, you pay attention, and you don't get to script what happens next.

David Maus Jr. has reviewed pretty much every cold plunge on the market: Plunge, Ice Barrel, Nordic Wave, Polar Monkeys, Edge Theory Labs, Desert Plunge, and dozens more. His channel is where serious buyers go before spending four figures, precisely because he's picky about what he'll even touch: "I do a lot of vetting now with the founders and with the product… I try to bring you reviews of unique products that are actually worth taking your time and checking out. So, I don't sell out to any brand."

We shipped him a Spire Elite prototype before launch (the first unit to leave our hands), hit record, and let him say whatever he wanted. Here's what happened, with his words throughout and the full video below.

Transparency: Inergize provided the prototype for review, and purchases through David's link support his channel. Nobody at Inergize edited or approved the video before it went live.

Who Is David Maus Jr. (and Why His Take Matters)

If you've researched cold plunges on YouTube, you've watched David. He's the reviewer who unboxes everything on camera, fills it, plunges in it, and tells you whether it's worth your money, including when it isn't. He famously avoids brands that white-label generic hardware, and he checks: "I've never seen one like it, which is always a good thing, because that means they're not just buying a large shipment of some mass-produced chiller from China and slapping their label on it, calling it a day. Unfortunately, that's what a lot of brands do, and I try not to review any of them."

He also has history with us. About two years ago he reviewed our original portable cold plunge and later our ProChiller, and as he says in this video, "a lot has changed with that company since my original review." That arc is exactly why we sent him the Spire first.

The Unboxing: "That's Actually Clean"

David's first look at the Spire's stainless interior, on camera, unscripted:

"Dude, that's actually clean… Rounded edges, rounded stainless steel. Bro, this is actually sick."

Then the tub itself came out of the crate:

"There's not a lot of great, premium-looking cold plunges. There's a lot of the plastic ones… but there's not a lot that bring that look that you expect from a cold plunge. I'm talking about cedar, stainless, timeless looks."

Two details he kept coming back to. First, the rounded stainless edges: "on the stainless steel models, the ones that I've seen, they're all pretty sharp edges. It's kind of, I would assume, expensive to have rounded edges on a cold plunge." (He assumes right.) Second, the footprint: "It doesn't take up a massive footprint." Neck-deep vertical immersion in about five feet of floor space is the entire point of the Spire's geometry.

He even complimented the box ("this is good packaging, and as somebody who unboxes a lot of cold plunges, I can appreciate that"), which, from someone who has opened dozens of crates, we'll take.

The In-Tub Experience at 6'1"

David is 6'1", so his sit test is the one tall buyers should watch (19:27 in the video):

"That's nice… It's so smooth. Stainless steel just feels different… more of a premium feel in my experience."

"Slanted back, which is a very unique experience for an upright plunge. The bench is low enough for me to really get comfortable. The rounded edge is really comfortable on my neck."

He called out two design choices most reviews never mention. The water-return jet sits low and tracks toward the bench, not your chest: "A lot of them are right here at the chest… you have a flood of cold water punching you in the chest… [that] isn't necessarily the greatest." And the wide, soft-edged rim means "the soft edges on the top make it really comfortable for you to leave your arms out, if that's how you want to plunge."

His one sizing note, that a full head dunk would take some scooting at his height, is exactly what the production version addresses. More on that next, because it's the most important section of this post.

He Tested the Prototype. The Spire That Ships Is Bigger.

This video is a first look at a pre-production unit, and David was upfront about it; he even called our founder on camera to get the production numbers. Every dimension he flagged got bigger in the version that ships:

In his words: "What we're going to see when they actually ship the final product… is a less condensation-prone cold plunge. More insulation means less condensation… a bigger setup, a taller setup, and an easier setup to get into. So, it's going to look just as sick as this, but be just slightly bigger."

So if you watched the video thinking "close, but I'm tall": the tub he sat in no longer exists. The shipping Spire fits users up to 6'4" neck-deep and 7'0" chest-deep, with three ways to fully dunk from the seat.

The Elite Chiller: "A Significant Upgrade"

David reviewed our ProChiller in a previous video, so his read on the new Elite Chiller carries weight: "In my last Inergize review, I reviewed what's called their ProChiller. And the ProChiller is great, but this is their Elite Chiller. And it is a significant upgrade."

What he highlighted, in order of how excited he got:

It ships on wheels. "It's on wheels. That's so nice… usually they come on a rubber stopper, and if they have wheels, that's something you have to install yourself." Casters come pre-installed, with grab handles for pulling it out of the box.

Top-loading filter changes. "An all-in-one chiller that has a filter change on the top. That's awesome. There's not a lot of companies doing that… that makes changing out your filter a freaking breeze. You don't have to get water all over your floor."

Four-stage filtration, including an air filter. David walked through all four stages on camera (strainer, 20-micron main filter, ozone, and the air-intake filter): "Air quality inside a chiller is important. It's going to keep your components cleaner, keeping them lasting longer and more efficiently… you're starting to see that on more of the premium chillers." On ozone: "Ozone is one of my favorite ways to keep water in a cold plunge nice and sanitary."

Real cooling performance. The spec is an 890W draw with over 2,200W of cooling capacity, and a 37°F floor to a 104°F hot-tub ceiling. In his test, starting from 74°F hose water: "It's been about 2 hours since we had everything turned on, and we're already down to 49°." And once primed and running: "The chiller's nice and quiet."

Not a white-label unit. This is the part we're proudest of, given his stance on rebadged hardware: "This is my first time seeing this chiller. I've never seen one like it."

What David Flagged (Because a Real Review Has Both)

Three honest notes from the video. On first fill, he primed the pump by running hose water through the chiller's inlet before powering on, a normal step for all-in-one chillers shipped with dry lines and one we walk you through at setup. The full head-dunk took some maneuvering at 6'1" in the prototype; that's addressed by the production height increase and the three dunk methods (footwell step-in, scoot-down, lean-forward). And this was a first-impressions video, not a long-term test: "I think there's a lot to test… time tests." He's offered to do a full review of the finalized product if enough people ask. So go ask, in the comments of his video.

David's Verdict

"If I was looking for a cold plunge to really complement my outdoor space, really complement my sauna… man, nothing really compliments a cedar sauna like a cedar cold plunge that has stainless steel accents. And I just think this looks really good. So Inergize, I would say good work on this. It's a nice unique tub. Looks really good."

"This is definitely one worth considering. I'm excited to see the final product on this."

And on the details that add up to premium: "This is designed in Italy. And this is handcrafted. This isn't just some off-the-mill cold plunge that everybody and anybody's going to have coming off of a factory."

Key Moments in the Video

The Spire He Reviewed: Production Specs

See the Spire Elite →

Use code [DAVID-CODE-TBD] at checkout to support David's channel.

FAQs

Is the Inergize Spire Elite worth it, according to David Maus Jr.? His on-camera verdict: "This is definitely one worth considering," after calling it "a nice unique tub." He was reviewing a prototype; the production version is larger in every dimension he flagged.

What did David like most about the Spire? The rounded stainless edges ("that's actually clean"), the cedar-and-stainless look, the reclined seat ("a very unique experience for an upright plunge"), the wheels and top-loading filter on the Elite Chiller, and the 4-stage filtration with ozone.

Did he find any problems? Prototype sizing at his 6'1" height (production adds over 4 inches of torso depth and ~2 inches of legroom), and priming the pump with hose water on first fill, standard for all-in-one chillers. He also noted a first-impressions video isn't a long-term test.

Was the review sponsored? Inergize provided the prototype unit; David wasn't scripted, and nobody at Inergize edited or approved the video. Purchases through his link or code support his channel.

How is the production Spire different from the one in the video? Almost 2 inches more legroom (31"), over 4 inches more torso depth (27", neck-deep for users up to 6'4"), three steps instead of two, and 1.2" insulation instead of 0.5".

How cold does the Spire get, and how fast? The Elite Chiller cools to 37°F and heats to 104°F. In David's test, water dropped from 74°F to 49°F in about two hours on the prototype, plenty cold to plunge the same afternoon you fill it.

Has David Maus Jr. reviewed Inergize before? Yes: our original portable cold plunge about two years ago, and our ProChiller. His words on the Elite Chiller: "it is a significant upgrade."

Where can I watch the full video? Right here on this page, or on David's YouTube channel. Want his long-term review of the production Spire? Ask for it in his comments; he's said he'll make it if people want it.

Want to see how the Spire stacks up against everything else David has reviewed? Start with our 2026 comparison hub or the full best cold plunge tubs of 2026 ranking.

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