Inergize Spire Cedar and Stainless Cold Plunge with Chiller
- 33-37°F minimum
- 81-100 gal
- 0.8-1 HP chiller
- Heats to 100°F or more
SVT Score
An upright cold plunge in red cedar over 316 stainless steel with a reclined seat, sold with a 0.8 HP chiller that also heats.
$7,990
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Usability
5.4 out of 10- Apex option: the Apex Ice chiller is rated to 32°F; it is not the configuration scored
- Heating: 8,546 BTU/hr on the cut sheet
- Walls: 2 in on the current pages (0.8 in cedar over 1.2 in foam) and about 1.5 in on an older page, so no insulation point
- Cladding: red cedar; the policy excludes checking and colour change in the wood
- Searched: Intertek UL CSA CPSC Health Canada
Better on verificationPlunge Original cold plunge tub with Pro ChillerIntertek lists Plunge's maker. $8,490Scores 4.0- Terms: repair or replacement at the brand's choice; the owner pays removal, return shipping and reinstallation
Better on warranty & supportBlueCube Drop cold plungeThe whole system. $11,750Scores 7.0- Option: Apex Ice chiller $9,990.00
- Option: Spire Tub & Steps Only (no chiller) $5,990.00
- Option: Extended protection three years $850.00, five years $1,350.00
Strengths
- Marine-grade stainless steel interior
- Built-in reclined seat for comfort
- Hot tub mode for heated soaks as well
- Plugs into a standard household outlet
- Arrives assembled with steps and lid
- Four-stage water care with ozone
Drawbacks
- Short one-year warranty
- Its pages disagree on gallons and wall thickness
- Heavy: two people needed to move it
- Owner pays shipping on warranty repairs
- Store pages make wellness claims we do not assess
A handsome cedar and steel plunge that heats too, but warranty cover is short
Specs
- TypeRigid
- HeaterNot applicable
- FormTub
- PlacementIndoor or outdoor
- SeatsNot applicable
- Max TemperatureNot applicable
- Min Temperature33-37°F
- Capacity (Gallons)81-100 gal
- Chiller0.8-1 HP
- HeatsHeats to 100°F or more
- Water CareFilter, Ozone
- Power Supply120V plug-in (15A)
- EMF ClaimedNot applicable
- EMF MeasuredNot applicable
- CertificationsNone verifiable
- Warranty1 Year
At a glance
- Ten-degree seat recline
- Three-step entry
- Onboard GFCI
- Inergize Health LLC, a California company based in San Diego, sells Inergize cold plunges in the US through its own store at inergizehealth.com, from an inflatable tub that packs into a backpack to a cedar and stainless steel plunge with a reclined seat.
- Its founder, Ciaran Flanagan, formed the company in January 2022.
- Tubs and chillers ship free to the lower 48 states by FedEx or UPS, and the Spire travels as crated curbside freight.
- No Inergize store or listing was found on Amazon US in November 2026.
The Inergize Spire is an upright cold plunge with a 316 stainless steel interior clad in wax-coated red cedar, a 12-inch seat with a 10-degree recline, and three cedar steps on a stainless frame.
It is sold with the Elite Chiller, a 0.8 HP unit rated to 37°F and 104°F, with 7,613 BTU/hr of published cooling, a 20 micron filter, 400 mg/hr of ozone and Tuya app control. The product page gives 120 gallons, the cut sheet 120 gallons at most and 100 at fill, and an older Spire page roughly 90 gallons.
The current pages give 2-inch walls (0.8 inch of cedar over 1.2 inches of foam) and a 3-inch insulated lid, while the older page gives walls of about 1.5 inches. The tub measures 39.56 by 28.85 by 43.76 inches, weighs 250 lb dry and 1,085 lb filled, and arrives assembled by crated curbside freight.
The chiller draws 890 W from a 120 V 15 A grounded outlet and carries an onboard GFCI and an IPX4 rating. The Apex Ice chiller option is rated to 32°F, is given as 2.0 HP on the current page and 1 HP with a 20 A dedicated circuit on an older page, and sells for $9,990.00.
The Spire Tub & Steps Only sells for $5,990.00, and extended protection costs $850.00 for three years or $1,350.00 for five.
Questions answered from our data
How much does a cold plunge cost?The 62 cold plunges we list run from $549 to $28,880, with a median of $7,495.
How cold does a cold plunge get?32 of the 62 cold plunges we list are rated to hold water at 37°F or colder, as their makers rate them.
How many gallons is a cold plunge?30 of the 62 cold plunges we list hold more than 100 gallons, as their makers rate them.
Does a cold plunge need a dedicated circuit?Seven of the 62 cold plunges we list ask for a dedicated circuit of 20 A or more, or a 240 V supply, as their makers state it.
