Spire Tub & Steps Only
The only cedar and 316 stainless steel vertical cold plunge with a seated recline for comfort and easy breathing.
- Premium red cedar + 316 marine-grade stainless steel for unmatched durability.
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5ft footprint. Modular design fits any space.
- 120 Gallons. Fits users up to 7ft.
Tub Only
With Chiller
Included automatically with every order
4-Month Maintenance KitFilters, sanitizer, and test stripsFREE$199
Hose Insulation SetIncreases chiller efficiencyFREE$199
HeadrestNeck support for enhanced comfortFREE$149
Easy claims online, fast replacements, no fees.
HSA/FSA Eligible
Save an average of 30%
- Free Delivery
- US Support
- 30-Day Guarantee
- 1-Year Warranty
See It In Action
FEATURES
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Seated Recline Geometry
10° recline from vertical keeps your spine supported, chest open, and breathing natural. The only cold plunge with a built-in reclined seat.
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316 Marine-Grade Stainless + Premium Red Cedar
Marine-grade stainless interior wrapped in sustainably sourced wax-coated red cedar. Corrosion-proof, dimensionally stable, built to last decades.
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2-Inch Insulated Walls + 3-Inch Insulated Lid
Holds temperature for hours without the chiller running. Cuts energy use roughly in half versus aluminium or plastic tubs.
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Premium Cedar and Stainless Steps
3-step modular entry with cedar treads on a stainless steel frame and anti-slip EVA grip mats. Three points of contact from outside the tub all the way to the seat. Designed for easy entry and exit, including for older users and joint-sensitive bodies.
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Modular Chiller Placement
Up to 6 feet of insulated reinforced braided hose. Caster wheels let you move the chiller without help and place it on any side of the tub.
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Italian Design, Handcrafted Build
Designed in Italy with architectural inspiration. Built by hand from sustainably sourced cedar. Indoor and outdoor rated. Every unit QA'd before it ships.
WHAT'S INCLUDED
Spire Tub: 316 marine-grade stainless interior with red cedar cladding, CNC-cut Inergize logo
Cedar and Stainless Steps: 3-step modular configuration
Insulated Spa-Grade Lid: 3" thick, charcoal grey, Velcro-secured, all-weather
Insulated braided hoses: 6ft reinforced with metal fittings
Quick start guide and user manual
SHIPPING & DELIVERY
Free Curbside Delivery (within the contiguous US) includes curbside drop-off at your address on file. It will be the customer's responsibility to move the tank off the pallet and to the final desired location within the property.
International orders: email contact@inergizehealth.com.
WARRANTY & RETURNS
1-year warranty included on tub, chiller, and electronics. Optional extended protection available above the Add to Cart button.
FINANCING & PAYMENTS
Affirm financing from 0% APR available at checkout. Pre-qualify without affecting your credit score.
HSA/FSA eligible through Truemed at checkout. Save an average of 30%.
DOWNLOADS
The First
The First Seated Recline Cold Plunge.
Chest open. Legs down. Neck-deep.
Sit Deeper. Breathe Easier. Recover Faster.
The only cold plunge built around a seated recline. 10° back from vertical, contoured seat 12 inches off the floor. Spine supported, chest open, breathing natural. Stay in longer. Recover faster.
Seated Recline Geometry 10° recline keeps your spine supported, chest open so you can relax.
Stacked-Leg Circulation Vertical leg position drives faster recovery than horizontal laydowns.
Neck-Deep Immersion 27" torso depth. Fits users up to 6'4" neck-deep, 7' chest-deep.
Easy Entry, Easy Exit Three points of contact from outside the tub to the seat.
Body Type Comparison
Comfort of a lay down. Health benefits of a barrel.
Spire combines the spinal comfort of a laydown with the upright breathing of a barrel, in one reclined form. You sit back, breathe deep, and stay neck-deep, long enough for cold therapy to actually do its work.
Lay Down
Spire
Barrel
Comfort of a Laydown. Health Benefits of a Barrel.
The longer you can stay in, the more recovery you get. Barrels cramp you out. Laydowns leave your shoulders dry. Spire's seated recline keeps you comfortable, neck-deep, and breathing easy.
Spire Vertical Hybrid
Position
Reclined seat, feet down, fully relaxed
Breathing
Chest open, diaphragm uncompressed, easy breathing
Immersion
Neck-deep, vagus nerve reached
Time in tub
Stay 5–10 min, body relaxed
Entry & Exit
Controlled 3-step cedar entry, integrated seat-step
Footprint
Compact 5 ft
Barrel / Pod
Position
Cramped squat, knees bent
Breathing
Chest open but knees bent against torso
Immersion
Chest-deep with bent knees
Time in tub
Limited by knee/hip discomfort
Entry & Exit
Climb over the rim, basic stool if included
Footprint
Compact 5 ft
Laydown Tub
Position
Flat on back, holding sides, slippery
Breathing
Diaphragm works against gravity, shallow breathing
Immersion
Half-body only (24" depth)
Time in tub
Limited by shallow breathing
Entry & Exit
Aggressive drop-in, hold yourself up on the way down
Footprint
8 ft, dominates the space
“There's Not Many Luxury Cold Plunges. This is One.”
David Maus Jr. unboxes the first-ever Spire Elite in this raw, watch his unscripted first-look review below:
In a League of Its Own
Spire Elite is the only vertical hybrid cold plunge with a seated recline, 4-step filtration, and 4× the ozone output. Built like furniture in red cedar and 316 marine-grade stainless, it sits below luxury laydowns in price and far above plastic barrels in feel and finish.
Compare Spire to:
Seated Recline
Tub Materials
Premium Steps
Italian Design
Insulated Lid
FROM OUR COMMUNITY
Real People, Real Results
Hear from real Inergize owners on the features that matter most.
Trusted by Elite Performers
Pro athletes, UFC fighters, CrossFit champions, and longevity experts use Inergize daily.
Why Inergize?
Engineered to Last
Founded by a master's-level mechanical engineer. Spire is built with industrial-grade compressors, marine-grade stainless, and red cedar. Fast cooling. Real materials. Built for decades, not seasons.
U.S.-Based Support, On Call
You're not just buying a tub, you're backed by real people. Our San Diego team includes the engineers who built Spire. Same-day responses, video troubleshooting, and a repair center in Los Angeles when you need hands-on service.
5,000+ Units Delivered
Inergize launched on Indiegogo in 2022. Today we've shipped over 5,000 cold plunges across our product line and we're one of the longest-running cold tub companies in the U.S. We don't just sell tubs, we ship them, support them, and stand behind them.
More Than Just a Cold Tub
With your purchase you'll get our 27-page Cold Plunge Blueprint, bi-weekly insights from our founder, and access to in-person Inergize community events. We help you make this a daily practice, not a one-time purchase.
COLD THERAPY
Powerful Benefits of Cold Therapy
A daily plunge isn't a hack. It's a practice that compounds across your body and mind.
Sharper focus
Cold triggers a sustained dopamine and norepinephrine release. Most owners report two to four hours of clear, calm focus.
Stronger resilience
Three minutes of cold trains your nervous system. The carryover shows up in every hard thing you do.
Faster recovery
Cold reduces inflammation and post-training soreness. Athletes have used it for decades. The research caught up.
Deeper sleep
A morning plunge reinforces your circadian rhythm. Most owners report deeper sleep within the first month.
Elevated mood
Cold immersion drives a measurable lift in dopamine. Owners describe a steady, sustained sense of calm energy.
Reduced inflammation
Cold immersion lowers systemic inflammation. The same mechanism athletes have relied on for serious recovery.
Better metabolism
Cold activates brown adipose tissue and supports metabolic health. Real, modest, well-documented in the research.
Stronger immunity
Regular cold exposure is linked to increased white blood cell activity and fewer sick days reported by owners.
FAQs
When will my Spire actually ship?
Spire is built to order in small batches. For the next shipment date check below the add to cart button. Earliest deposits ship first within the batch, we email you 2 weeks before your unit ships with tracking and delivery scheduling.
Inergize has been shipping cold plunges since our 2022 Indiegogo (crowdfunding platform) launch. Over 5,000 units delivered across our product line. We're a US-based team and we ship what we sell.
How is Inergize Spire different from Plunge, Renu Therapy, Cold Life, and Nordic Wave?
Spire is the only cold plunge with a built-in seated recline. Most plunges force you into a cramped standing squat (Nordic Wave, Cold Life, Ice Barrel, Renu Vero) or a fully horizontal laydown where your shoulders sit above the water (Renu Cold Stoic, Plunge All-In). Spire splits the difference: 10° recline from vertical so your spine is supported, your chest stays open, and your shoulders stay submerged.
Beyond the seat: Spire runs 4-stage filtration with 400 mg/hr of ozone (most competitors run 1-2 stages), it's built from red cedar and 316 marine-grade stainless instead of rotomolded plastic, and it ships with integrated cedar and stainless steps instead of a basic step stool.
Will I fit? What are the internal dimensions for head-dunking?
Spire fits users up to 6'4" comfortably with neck-deep immersion. Users up to 7ft fit with chest deep immersion.
Internal dimensions:
- Legroom (seat to front wall): 31"
- Shoulder width: 24.8"
- Torso depth (seat to rim): 27.2"
- Seat height: 12"
- Overall internal height: 44"
Three ways to head-dunk:
- Step into the footwell: full barrel-style submersion, then climb back onto the seat
- Scoot down with knees raised: drop deeper into the water without leaving the seat
- Lean forward from the seat: quickest dunk, no repositioning needed
How well insulated is it? Will it run my electric bill up? Does it run 24/7?
Spire is built to hold temperature. 2" of total wall insulation: 0.8" red cedar cladding over 1.2" closed-cell PU foam injected onto every steel surface (sides, base, and seat). The 3-inch insulated lid locks in cold when you're not using it.
The chiller can run 24/7 but most people don't. Most owners schedule it around their routine through the app.
Example daily routine:
- 4:00 AM: chiller switches on automatically (1 or 2 hours before plunge)
- 5:00 AM: water at 37°F, you plunge
- 5:30 AM: chiller runs another 30 minutes to filter and clean
- 6:00 AM: chiller off until your next session
Real-world energy cost at $0.15/kWh:
- Typical owner (3 hours/day scheduled): ~$12/month
- Light use (1.5 hours/day): ~$6/month
- Maximum (24/7 continuous, rare): ~$96/month
The 2-inch insulated walls and 3-inch lid hold cold for hours between sessions, so the compressor only kicks back on briefly when water rises a few degrees above target. Schedule through the Tuya app or onboard touchscreen.
Where is Spire made and where is your support based?
Spire is designed in Italy and handcrafted from sustainably sourced red cedar, then shipped to our California warehouse for QA before delivery to you. The Elite chiller is engineered with industrial-grade components from suppliers we've worked with for 4+ years. Every unit is QA'd before it ships.
Our support and repair operations are 100% U.S.-based. Customer support responds the same day, phone support is available Monday-Friday 8am-4pm PST, and our dedicated repair technicians operate out of Los Angeles and San Diego CA.
What's the warranty and what happens if I need service?
Every Spire ships with a 1-year warranty covering the tub, chiller, and electronics. Optional Care Plan coverage extends that to 3 or 5 years (available above the Add to Cart button or directly in your cart).
If you need service: contact us through email or phone.
US-based hardware service. Most issues resolve within 5-7 business days.
Building a home or renovating? Can I align delivery with my construction?
Yes. If you're mid-build and need delivery aligned to your timeline, we can hold your unit until your space is ready. Place your reservation deposit now to lock in founder pricing, then email us with your target delivery month — we'll align production and shipping to match.
Most owners building new homes coordinate delivery 2-4 weeks before final inspection so the tub is on-site when the space is ready but not before. We've worked with general contractors and architects to plan around foundation pours, electrical rough-ins, and finished flooring schedules.
Email contact@inergizehealth.com after placing your deposit and we'll handle the rest.
Have questions?
Get expert guidance from our team
- DDanaRated 5 out of 5 stars1 month agoGreat tub
We are loving our cold plunge! The ozone helps keep it sparkling clean! It was so easy to set up and is very spacious! This is the best price you will find for a cold plunge with all these features! The team is also very helpful with questions you have.
- SCSal C.Verified BuyerRated 5 out of 5 stars4 months agoGreat Product!
I purchased the Inergize Cold Plunge – Elite Tub, and I can honestly say it has been life-changing. The quality of this system far exceeded my expectations, especially for the price point.
The chiller is extremely well built and thoughtfully designed. The WiFi features make it easy to control temperature and timing right from my phone. The built-in ozone system, strong water flow, and internal filtration give me total confidence in cleanliness and performance. This is clearly a high-quality unit built to last.
The tub itself is outstanding—very sturdy, well constructed, and large enough for full-body immersion with ease. Getting in and out is simple, and it feels solid and secure every time I use it.
As a retired member of the armed forces dealing with PTSD and TBI, this investment has helped me tremendously—both mentally and physically. I’ve experienced improved mood, better stress regulation, reduced inflammation, and an overall sense of mental clarity and resilience. Cold plunging has become a vital part of my daily routine.
I genuinely cannot believe I was able to get such a high-quality product at such a good price. I highly recommend the Inergize Elite Tub to anyone looking to improve recovery, mental health, and overall well-being. This is a great product, and I’m extremely thankful for it.
