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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 →

Chilled plunge tub

Polar Monkeys Brainpod 2.0 Cold Plunge

Black, Standard size (67 in), 1.0 HP ChillX chiller

$10,990US price, checked Oct 13, 2026

Lay-back acrylic tub that chills and heats from 32 to 107°F, with white-glove delivery

Check price at Polar Monkeys Full review →

Criterion	Plunge Air	Polar Monkeys Brainpod 2.0 Cold Plunge
US price	$5,490Checked Oct 13, 2026 · Price details in the review	$10,990Checked Oct 13, 2026 · Price details in the review
Three-year ownership estimate	$5,490 Incomplete known subtotal. Not included: installation, annual consumables, energy use.	$10,990 Incomplete known subtotal. Not included: installation, annual consumables, other annual costs, energy use.
Choose if	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 want cold plunges and warm soaks in one lay-back tub, carried into the room for you, and you have a spare dedicated 15 A circuit.
Main trade-off	The tub is covered for only 90 days (the chiller gets 1 year), and Plunge doesn't publish enough to estimate running costs.	At $10,990 you get 2 years of coverage unless you pay $1,299 or more for Chill+, and once you fill it or plug it in, you can't return it.
Key specifications	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: 32°F to 107°F from one chiller that cools and heats. Polar Monkeys says it holds the set point within 0.5 degrees Chiller: 1.0 HP ChillX, 76 lb. The user guide says water typically cools 2 to 6°F per hour. Heating rate isn't stated Electrical: Dedicated 120 V, 15 A circuit with GFCI protection. The user guide rates the 1.0 HP ChillX chiller at 11.5 A and 1,120 W Size: Tub 67 × 31.5 × 23.5 in, with a total footprint 80 in long. Polar Monkeys says it suits most people up to 6'2" Water capacity and weight: 85 gallons in the spec list but 80 in the store description. 110 lb empty, 819 lb filled Sanitation and filters: Ozone plus a filter cartridge replaced every 3 to 4 weeks. Third-party filters void the warranty Controls: iOS and Android app over 2.4 GHz Wi-Fi, with scheduling and a session timer
Exact variant	Cold Only (no heater add-on)	Black, Standard size (67 in), 1.0 HP ChillX chiller
Dimensions	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.	The Standard cold plunge measures 67 in long, 31.5 in wide and 23.5 in high. Polar Monkeys gives a total footprint of 80 in long at the same width and height. The XL is 71 in long, or 84 in for its total footprint. The spec list gives a capacity of 85 gallons (322 L), but the store description says 80 gallons. The tub weighs 110 lb empty and 819 lb filled. Polar Monkeys says the Standard size suits most people up to 6'2" and suggests the XL for taller users. Interior dimensions aren't stated.
Installation	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.	The user guide calls for a dedicated 120 V, 15 A circuit with GFCI protection. You must use the GFCI extension that comes with it and no other extension cord. The product page's spec list says 110 V, though its FAQ says 120 V. Polar Monkeys calls it plug-and-play with no plumbing. You fill it with a garden hose to 8 to 9 in below the rim, using the included hose filter. You empty it through a built-in drain valve or side drainage. The chiller weighs 76 lb and needs 12 in of clearance on its left and right. The standard hoses reach 6 ft, and longer runs need custom hoses from Polar Monkeys. The guide asks for a level, solid, water-resistant surface that can hold the filled tub, ideally in shade. It gives no floor-load figure. Below 33.8°F ambient you switch to heating mode. Below 25°F you drain the tub and bring the chiller indoors. White-glove delivery in the continental US is included: the crew places the tub in the room you choose, unboxes it and removes the packaging. Installation isn't included. The product page says it ships the next business day.
Materials	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.	The tub is fully insulated acrylic. Polar Monkeys doesn't name the insulation material. Black and White cost the same, and the four printed finishes cost $600 more. Polar Monkeys says custom artwork, logos and colorways are available on request. Included items are an insulated cover, two filters, an ergonomic pillow, a phone holder, a hose filter and a skimmer net. The warranty page says the systems are assembled and serviced in the USA.
Warranty	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.	It comes with a 2-year limited warranty covering defects in materials and workmanship, counted from the original purchase date. Coverage is for the original purchaser only, with proof of purchase, and it isn't transferable. The product page says the Brainpod is for residential use only, and the warranty excludes a residential unit used commercially. Other exclusions include misuse, improper installation, freezing conditions, power outages, and poor water chemistry or filter care. Enclosing the chiller in a box or cabinet that restricts airflow is excluded too. Third-party filters void it, and so does any modification, even a cosmetic one. You must claim within 30 days of finding a defect, by email with photos and videos. Standard claims carry no shipping fee in the continental US. In-home repairs are covered only up to a pre-approved amount. Chill+ 3-Year costs $1,299 and Chill+ 5-Year costs $1,899. You can buy either only when you buy the tub. Claims under an extended warranty carry a flat $299 shipping and handling fee for residential units.
Returns	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 can ask for a refund within 30 days of delivery. The refund policy is strict: the tub must be unused, unfilled, never plugged in and never operated. So you can't fill it to try it and then send it back. Polar Monkeys decides whether a return qualifies, and its decision is final. A 25% restocking fee applies, which is $2,747.50 on a $10,990 tub. That fee covers return shipping within the continental US. Canceling an order after it's placed costs 5%. Accessories, supplies and consumables can't be returned, and any modification voids both return eligibility and the warranty. The policy doesn't say how long a refund takes.
Unresolved questions	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	Average power use and typical daily run time Heating rate An explicit indoor or outdoor rating (the guide gives ambient limits and suggests shade but doesn't name one) Whether capacity is 85 gallons (spec list) or 80 (store description) Which replacement cartridge (standard or Pro cooling) fits the Brainpod 2.0, and so its price How long the Sirona chemicals last at the guide's dosing Interior dimensions Whether the 110 lb empty weight includes the 76 lb chiller Length of the included GFCI extension Whether the tub or chiller carries an electrical safety listing such as ETL, UL or CSA Whether the app carries a fee How much labor a standard warranty claim covers beyond in-home repairs up to a pre-approved amount Whether Chill+ 3-Year and 5-Year terms count from purchase or add to the base 2 years

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.