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Chilled plunge tub

BlueCube C1 Cold Plunge Tub

60-inch Standard, Black cladding

$16,500US price, checked Oct 13, 2026

Handbuilt stainless sit-in tub that both chills and heats, 41–104°F

Check price at BlueCube Full review →

Chilled plunge tub

Plunge Air

Cold Only (no heater add-on)

$5,490US price, checked Oct 13, 2026

Plunge's lowest-priced chilled tub, inflatable and app-controlled

Check price at Plunge Full review →

Our upright pick

Nordic Wave Viking Premier Cold Plunge

Arctic White with the Gen 2 Pro chiller (0.8 HP, heater included)

$5,990US price, checked Oct 13, 2026

Upright plug-in plunge that chills to 35°F on a 36 × 30 in footprint

Check price at Nordic Wave Full review →

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Criterion	BlueCube C1 Cold Plunge Tub	Plunge Air	Nordic Wave Viking Premier Cold Plunge
US price	$16,500Checked Oct 13, 2026 · Price details in the review	$5,490Checked Oct 13, 2026 · Price details in the review	$5,990Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$16,500 Incomplete known subtotal. Not included: installation, annual consumables, other annual costs, energy use.	$5,490 Incomplete known subtotal. Not included: installation, annual consumables, energy use.	$6,169.97 Incomplete known subtotal. Not included: energy use.
Choose if	You want one stainless tub for cold plunges and warm soaks, indoors or out, and you have a free 120 V, 20 A circuit and a way to move a freight delivery from the curb.	Anyone who wants Plunge's chiller and app at the lowest list price, with a 15 A circuit near a floor that can hold about 904 lb.	You have a small indoor or outdoor spot near a standard outlet, and you want cold plunges and warm soaks without an electrician.
Main trade-off	You pay $16,500 without a published footprint, water volume, weight or running cost, and changing your mind costs a minimum 25% restocking fee plus shipping.	The tub is covered for only 90 days (the chiller gets 1 year), and Plunge doesn't publish enough to estimate running costs.	The chiller is covered for only a year, and power costs are unknown because Nordic Wave publishes no power draw.
Key specifications	Temperature range: 41–104°F with the chiller and heater. BlueCube says the C-line cools about 5°F per hour Chiller: 13,600 BTU (1.5 HP+) commercial chiller, rated to operate down to 20°F ambient Electrical: Dedicated 120 V, 20 A outlet with the included GFCI cord, or hardwired. Power draw not stated Water capacity and weight: Not stated by the manufacturer Circulation and sanitation: ¼ HP Iwaki magnetic-drive pump at 25.6 GPM for continuous circulation (RiverMode), with 20-micron filtration and automatic ozone Tub: Sit-in 14-gauge 316-L stainless steel, with immersion up to the neck Controls: iOS and Android app, plus nighttime lights	Lowest stated temperature: 39°F / 4°C Water capacity: 105 gallons Chiller: 1/2 HP for the Air. Plunge rates the standard chiller at 4–6°F per hour and the Pro chiller at 8–10°F per hour. It doesn't say which one ships with Cold Only Electrical: 110–120 V, 15 A. A dedicated circuit is listed as a requirement and recommended in the FAQ. Built-in 15 ft cord. Wattage not published Weight: 28 lb without water, 903.7 lb with water. Chiller weight not published Water care: 20-micron filter plus ozone. Works with chlorine or non-chlorine maintenance Controls: Plunge app over 2.4 GHz Wi-Fi to set temperature and track sessions	Temperature range: 35–104°F with the included heater. Hot mode is switched on in the Nordic Flow app Chiller: Gen 2 Pro, rated 0.8 HP, with an auto-priming pump. The 1.0 HP Elite is suggested for warm climates. No cooling rate is published Electrical: Standard 120 V household outlet. Amperage, wattage and GFCI needs not stated Size and capacity: 36 W × 30 D × 44 H in outside and about 95 gallons. Listed at 60 lb without water and about 904 lb with water Water care: Multi-stage filtration with UV on the product page, and ozone in the store description. 50-micron filters, changed monthly Outdoor use: Rated down to 14°F ambient. Drain it at 14°F or below Controls: Free Wi-Fi control in the Nordic Flow app. A 60-day membership to its mindfulness tools is included, and guided routines are an optional subscription
Exact variant	60-inch Standard, Black cladding	Cold Only (no heater add-on)	Arctic White with the Gen 2 Pro chiller (0.8 HP, heater included)
Dimensions	It's sold as a 60-inch sit-in tub with full-body immersion up to the neck. The interior is contoured at a 20° slope. The product page names 54-inch Mini and 60-inch Standard sizes, but the online store lists only the 60 size. BlueCube doesn't state exterior or interior dimensions, water capacity, or empty and filled weight on the pages reviewed.	Tub 61 L × 32 W × 28 H in (outer). Plunge doesn't give inner dimensions. The standard chiller is 23 L × 14 W × 18 H in. Plunge also lists a Pro chiller at 28 L × 16 W × 17.5 H in. Leave 12 in of clearance behind the chiller, 12 in to the side and 6 in below. The Air is listed at 28 lb without water and 903.7 lb with water. The chiller's weight isn't published.	Outside, it measures 36 W × 30 D × 44 H in. Inside, the spec table lists 32 W × 26 D × 39 H in, but an FAQ on the same page gives 37 in for the height. The floor is 24 × 19 in, and it holds about 95 gallons. The spec table lists it at 60 lb without water and about 904 lb with water. Those figures don't add up, since 95 gallons of water weighs about 790 lb. That leaves about 110 lb of dry weight, not 60. Nordic Wave's online store gives 235 lb for the Pro version and 245 lb for the Elite, without saying what that weight covers. An FAQ on the page says the Classic Viking is 30 in wide and fits through most residential doors. That 30 in matches the tub's depth, not its 36 in width.
Installation	It needs a dedicated 120 V, 20 A outlet, and a GFCI cord is included. You can hardwire the tub instead. BlueCube rates it for indoor and outdoor use and says the chiller operates down to 20°F ambient. Delivery is free curbside freight in the continental US, not in-home placement. BlueCube doesn't state plumbing, drain, floor-load or clearance requirements on the pages reviewed.	It plugs into household power, but Plunge describes the requirement three ways. The product card lists 110 V/15 A. The electrical requirements call for a 120 V, 15 A dedicated circuit and mention a built-in 15 ft power cord. The FAQ says it uses a standard 110 V outlet and recommends a dedicated 15 A circuit with no other appliances on it. Setup, per the FAQ, means inflating the tub with the included pump, connecting two hoses, filling it with water and plugging in. Plunge gives the setup time as 15 or 20 minutes. In-home delivery doesn't include assembly, setup or connection to power or water. It's for indoor or outdoor residential use only.	Nordic Wave says the chiller runs from a standard 120 V household wall outlet, with no specialized electrical upgrades. It doesn't give amperage, wattage or a GFCI requirement. The page calls setup plug-and-play, with an auto-priming pump, and puts it at 15 minutes. It doesn't say how to fill the tub. You drain it by connecting a garden hose to the bottom valve. It's rated for indoor and outdoor use down to 14°F ambient. At 14°F or below, the FAQ says to drain it and store it somewhere temperature-controlled. Shipping to the continental US is free by FedEx Freight. White Glove delivery is an optional upgrade at checkout, and the page doesn't give its price. It ships in 1 to 2 weeks.
Materials	The tub is 14-gauge marine-grade 316-L stainless steel with a contoured sit-in interior. It sits in a marine-grade plywood cabinet coated in Line-X polyurea, which BlueCube says adds UV resistance and insulation. Black is the cladding priced here, and white, grey, beige and uncladded cost the same. BlueCube also offers any Sherwin-Williams custom color, but the online store doesn't list a price for it. BlueCube's performance page says its plumbing is Schedule 40 PVC. That's a brand-wide statement, not a C1 spec. An insulated spa cover with child locks is included.	Plunge describes an inflatable warp-knit drop-stitch tub that's UV-resistant and insulated, with an insulated cover. The page's comparison cards contradict that. They list "fiberglass reinforced acrylic" for the Air and every other Plunge model.	Nordic Wave doesn't name the shell material. The walls have 2 in of foam insulation, with an anti-sweat design meant to stop condensation. The floor slopes to a dedicated drain valve. It comes with all-weather steps, a Stay-Cold lid and a 2-month supply of filters. The chiller has a clear filter housing, so you can see the filter.
Warranty	Full coverage (parts and labor) runs 3 years for residential use or 1 year for commercial use. The stainless tub and frame are covered for 15 years. Exclusions and the claim process weren't reviewed.	The tub is covered for 90 days and the chiller for 1 year, according to Plunge's warranty note. Elsewhere the page is less clear. The comparison card lists a "1 year warranty," and the FAQ mentions a "1-year limited warranty" without separating tub and chiller. Coverage starts at delivery. You activate it by downloading the app and connecting the unit to Wi-Fi. It stays active only while the unit remains connected to Wi-Fi and the app.	The tub is covered for 5 years from purchase and the chiller for 1 year from delivery, against defects in materials and workmanship. The warranty page covers the Viking Cold Plunge System and doesn't name the Premier separately. Coverage is for home use by the original buyer and can't be transferred. You must buy filters from Nordic Wave to keep it. Exclusions include skipped filter changes, poor water care, freezing, voltage fluctuations and misuse. Improper installation or relocation is excluded too, and using a third-party freight forwarder voids it. It must be installed and running within 30 days of delivery, and mold or stagnant water from a delay isn't covered. A chiller repair or replacement costs you a flat $250 for shipping and packaging both ways. Repairs must be done by a Nordic Wave approved technician.
Returns	Standard models have a 30-day money-back policy with a minimum 25% restocking fee. Under the refund policy, you must request a return within 30 days of receipt, and the unit must be unused and in its original packaging. Refunds are paid net of the 25% restocking fee and shipping expenses. Custom builds can't be returned. On a $16,500 tub, the fee alone is at least $4,125.	The FAQ says you can return the unit within 30 days for a full refund. A second FAQ answer calls it a hassle-free return policy but says some conditions may apply. It points to the full Return Policy, which wasn't checked for this review.	You have 15 days from delivery to request a return, and only new units qualify. Every approved return is charged a flat 20% restocking fee on what you actually paid, even if the box was never opened. The fee includes return freight. At the $5,990 sale price, that's $1,198. You can cancel within 48 hours of ordering for a full refund if the order hasn't entered fulfillment. After that, a 5% fee applies until it ships, and a shipped order can't be canceled. Refurbished, open-box, floor-model and clearance units are final sale. A defective or damaged unit carries no restocking fee if you report it within 48 hours of delivery. That's shorter than the 7 days the warranty page gives for shipping damage.
Unresolved questions	Exterior and interior dimensions Water capacity, and empty and filled weight Power draw of the chiller, heater and pump Heating rate and typical daily run time Replacement filter price and change interval What's in the included maintenance kit Warranty exclusions and claim process Build and delivery lead time Whether you can order the 54-inch Mini named on the product page Whether the tub or its equipment carries an electrical safety listing such as ETL, UL or CSA Whether the app needs Wi-Fi or carries a fee Whether the C1 gets the UV stage of the brand-wide "ozone + UV" sanitation on BlueCube's performance page (the C1's own listing names only ozone) The price of a Sherwin-Williams custom color Whether a custom color counts as a non-returnable custom build	Which chiller (standard or Pro) ships with Cold Only, and so how fast it cools. The store SKU is EVOLVE-AIR-PRO-COLD, but no page text confirms it Chiller wattage and typical daily run time Chiller weight, and whether the 28 lb dry weight covers anything beyond the tub Prices and change interval for replacement filters and water treatment The full return conditions, such as return shipping or restocking fees How long the inflatable tub lasts beyond the 90-day warranty	Power draw, amperage, and whether a GFCI or dedicated circuit is recommended Cooling and heating rates What the optional guided-routine subscription costs after the 60-day membership Shell material The price of White Glove delivery Whether the $5,990 sale price applies at checkout, since Nordic Wave's online store still shows $6,990, and when the sale ends Whether the tub or chiller carries an ETL, UL or CSA safety listing Whether the interior height is 39 in or 37 in Whether the 60 lb empty weight includes the chiller, and what the store's 235 lb weight covers Whether filters need changing once or twice a month, since the product and filter pages differ Whether ozone is part of the water care, since the product page lists UV and the store description lists ozone

These comparisons use published specifications, not head-to-head tests. Prices and terms are dated. Unknown costs are not zero. Check the exact variant before you buy.