SHOP BEST SELLERS
Spire Elite
The only vertical cedar plunge with a seated recline. Built for daily comfort, not endurance.
Inergize Cold Plunge: Elite Tub
The original portable plunge thousands start with. 4-way filtration, hot and cold.
Elite Chiller
The chiller, sold solo. For DIY tubs or upgrading your old setup.
BY THE NUMBERS
Backed by science. Proven by 5,000+ owners.
5,000+
Owners since 2021
162 ★
5-star reviews
100+
Scientific benefits
50+
Commercial locations
10+
Countries served
5 Yrs
In business
Pro athletes, UFC fighters, CrossFit champions, and longevity experts use Inergize daily.
FROM OUR COMMUNITY
Hear from the most influential names in the wellness space.
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.
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.
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.
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.
MEET THE FOUNDER
Burned out and stuck, Ciaran Flanagan built his first cold plunge in a DIY chest freezer. Then he engineered something better. 5,000+ owners later, Inergize is one of longest-running cold plunge brand in the US.
COLD THERAPY
A daily plunge isn't a hack. It's a practice that compounds across your body and mind.
Cold triggers a sustained dopamine and norepinephrine release. Most owners report two to four hours of clear, calm focus.
Three minutes of cold trains your nervous system. The carryover shows up in every hard thing you do.
Cold reduces inflammation and post-training soreness. Athletes have used it for decades. The research caught up.
A morning plunge reinforces your circadian rhythm. Most owners report deeper sleep within the first month.
Cold immersion drives a measurable lift in dopamine. Owners describe a steady, sustained sense of calm energy.
Cold immersion lowers systemic inflammation. The same mechanism athletes have relied on for serious recovery.
Cold activates brown adipose tissue and supports metabolic health. Real, modest, well-documented in the research.
Regular cold exposure is linked to increased white blood cell activity and fewer sick days reported by owners.
APP CONTROL
Schedule cold sessions for sunrise. Hot tub mode at night. Ozone cycles on autopilot. Onboard touchscreen if you don't want to find your phone.
Schedule cold sessions
Set your plunge to be ready at sunrise.
Hot tub mode
Switch to 104°F for evening recovery.
Ozone autopilot
Automated sanitation cycles.
Onboard touchscreen
Full control without your phone.
Join 5,000+ owners who start every morning with a cold plunge engineered to last.
Spire Elite
Cedar + 316 marine-grade stainless. The only vertical plunge with a seated recline. Compact 5ft footprint, designed to live outside.
Inergize Cold Plunge: Elite Tub
The portable plunge with the same industrial 4-way filtration chiller. For people who want premium results without the install.
Elite Chiller
The chiller, sold solo. 0.8 HP cooling + heating with industrial 4-way filtration. For DIY tubs or upgrading from a weaker unit.
