Rezvani Frozin 400 Cold Plunge Tub with Chiller
Where we recommend it
Cold plunge tubs for a home spa·#2
A foam-insulated hard tub with its own chiller down to 37°F and a filter pump: compact enough for a garage or a corner of the gym.
Estimated retail value
$1,947.49
As of Oct 27, 2026
About it
A 100-gallon hard tub of foam-insulated polyethylene with its own 0.8 HP chiller, which cools the water to 37°F. A 20-micron filter and a 650-gallon-per-hour pump keep the water circulating. It measures 28 by 48 by 28 inches, weighs 90 pounds empty and fits someone up to 6 ft 3 in and 300 pounds. It stands on its own, in a garage, a home gym or outdoors.
Specifications
- Brand
- REZVANI
- Material Feature
- Low Density Polyethylene (LDPE)
- Product Dimensions
- 28"L x 48"W x 28"H
- Capacity
- 100 gallons
- Weight
- 90 lb
- Installation Type
- Freestanding
- Form
- Rectangular
- Finish Type
- Glossy
What it does
Adjustable temperature
The chiller cools the water as low as 37°F, and its temperature is adjustable.
App control
The chiller can be controlled from a smartphone app.
Water filtration
A pump and filter keep the water clean and circulating.
Also in Cold plunge tubs for a home spa
1
Smartmak Red Cedar Cold Plunge Tub with 1HP Chiller
The one that looks like spa furniture: a red cedar tub for two with a chiller that also heats, from 37 to 107°F, and UV and ozone keeping the water clean.
3
JUGRFIT 121-Gallon Cold Plunge Tub with 1050W Chiller
A drop-stitch tub with a 1050W chiller you run from your phone: chiller-cold water without the weight or permanence of a hard tub.
4
AudaciaGo XXL Inflatable Ice Bath Tub
The longest tub here and the simplest: an insulated inflatable with a lid. It has no chiller of its own, so plan on ice or adding one.
Where these picks come from: Amazon