BoxPlunge utilizes the built-in refrigeration system of a chest freezer to achieve freezing temperatures for cold plunges.

Unlike other cold plunge systems that rely on chillers to extract heat from the water via a heat exchanger and a fan, BoxPlunge passively radiates heat through the outer walls of the freezer, providing a simpler and more energy-efficient solution.

The unique design of BoxPlunge offers several advantages over traditional chiller-based systems:

1. Quieter operation: BoxPlunge operates without the need for a fan, making its refrigeration system significantly quieter than systems using chillers.
2. Less maintenance: The simplicity of BoxPlunge's design translates to fewer moving parts and less complexity, resulting in low maintenance requirements compared to external chiller-based cold plunges which do require yearly maintenance and are much more likely to break down (less reliable at freezing temperatures).
3. Superior insulation: BoxPlunge features exceptional insulation capabilities, thanks to the thick foam layer between the inner and outer walls of the freezer (3" of insulation). This advanced insulation ensures the water remains cold for extended periods, reducing the need for the compressor to run frequently. Also, the insulation guarantees "drip-free" walls which means there will not be any sort of external moisture due to condensation, in other words, a completely dry floor. Further, we guarantee water won't freeze even during very cold winters.
4. Uses less energy: The BoxPlunge cooling system is simple ~ works like your home freezer, not like the other cold-plunge chiller systems. You see, when water moves through pipes, it can pick up heat, making the system work harder to cool it down again. But BoxPlunge doesn't have this problem because it doesn't have water pipes. So, it uses less energy to keep the water cold. It's like it's saving energy because it doesn't have to do extra work to cool down the water again (like every other cold plunge in the market that has an external chiller system).
5. Less heat dissipation: The heat radiated from a BoxPlunge will not make the room hot (no exhaust required), any external chiller will make the room hotter, unless you install an exhaust.
6. No Plumbing: Not having an external chiller means water does not have to flow out of the unit to get chilled, this avoids any plumbing work which significantly reduces complexity on the system.

Our cold plunge freezers are equipped with a safety feature that automatically disconnects all electronics whenever you open the lid. You'll know it's working when you hear a "clicking" sound, which indicates the tub is safe and power-free. You will also be able to see the thermostat display turning OFF.

Additionally, all the electronics are GFCI protected. Which means everything will disconnect in case there is any electrical fault (similar to the breakers of your home).

- BoxPlunges are made from new chest freezers converted into a fully functional cold plunge. The three main components of the tubs are:

Filtration and sanitation: The active filter keeps impurities and some bacteria away from the water and a powerful ozone generator connected to a timer sanitizes the water and kills 99.9% of bacteria which keeps your water clear for months. Additionally, we sell H2o2 which is the most envirometally friendly chemical-based sanitation method for your cold plunge.

Thermostat: An external thermostat will regulate the temperature.

Safety equipment: The plunges are equipped with a water-safe GFCI plug. Additionally, our patent pending magnetically safe system unplugs everything from the freezer upon lid aperture.

Water-proof structure ("Tub"): The interior is made of enameled coated metal which is designed to be skin-safe, water-proof and corrosion-proof.

– Please refer to the upper section of the home page for this information.

– We are one of the only cold plunges in the market that are capable of producing ice. Simply drop the set temperature below 32F and let the ice form. But please understand that ice-formations may be abrasive.

– The freezer uses little energy:

A 14.3cu. Ft. uses around 338kwh of energy per year that is around $48 per year (at rates of $0.14 cents per kwh). The filtration system uses around 175kwh/yr which is around $25 per year. Total energy consumption should not exceed $75 per year.

- How does it use so little energy?

The BoxPlunge system works like your home freezer and it doesn't have any water pipes. You see, when water moves through pipes, it can pick up heat, making the system work harder to cool it down again. But BoxPlunge doesn't have this problem because it doesn't have water pipes. So, it uses less energy to keep the water cold. It's like it's saving energy because it doesn't have to do extra work to cool down the water again (like every other cold plunge in the market that has an external chiller system).

These can be kept outside under shade and ideally protected from the rain. Keep in mind that by leaving it exposed to extremely hot conditions or heavy rain showers you may shorten it's life-span.

If you would like to have one built to handle the elements better please select any "modern-style" skin which protects the outter white paint for 5 to 6 years.

The water won't freeze. With 3" insulation, 1,200gph water pump and with the water always inside the tub (i.e. no plumbing at all), it will not turn into ice.

Water may take 48hrs to reach low temperatures, that's why it is recommended to use ice the first time you fill it up with water and after 4 to 6 months when you have to change the water. For Box 19 it may take 72hrs to reach low temperatures.

All BoxPlunges use 110V. The boxes draw little current about 1 to 2amps. The reason is because they are very well insulated, so, a small compressor size is capable for lowering and keeping the water at freezing temperatures.

Box 8 to Box 12 use the MarineLand 97 gallon filter which comes in a more compact package. Box 14 to Box 24 uses BoxPlunge advanced filtration system comprised of a pre-filter and a 2.5" x 10" 20 micron pleaded filter (industry-standard)

- We would recommend changing it once a month.

- Assuming you shower and clean your feet before entering the cold plunge, we would recommend changing the water once every 2-6 months. This will really depend on how much impurity you bring inside the cold plunge every time you use it, by impurities we mean: Dirty feet, lotions, deodorant, hairs, etc...

– Yes, you may use SPA chemicals. All our cold plunges come equipped with an ozone generator but you may always add SPA chemicals to further sanitized the water such as: H2o2, Bromide salts or chlorine. BoxPlunge favorite is H2o2, we recommend this form of sanitation as it is the most enviormentally friendly, hydrogen peroxide (H2o2) will dissapear as it breaks down bacteria.

- You should rinse the debris from the pre-filter (i.e. hairs) in a weekly basis.

- Product pages have a human-model and 3D model and scale (height of both 5' 11") for you to choose the right size. Box 14 is the most popular among average heights, box 19 is prefect for those above 6' 3" and can even accommodate two people!

Nothing, the walls are very cold but the water is as cold.

I'm 5'11, my shoulders' width is 22" and have a 10cu. ft. in which I need to retract my shoulders a bit to fit in, but I really have no problems doing so.

The sizing may vary by: ± 2" (±1cu.ft.) because we may buy chest freezers of different manufacturers. NOTE: We always stick to the ones we know best and have good reputation: Frigidaire, Kenmore, Premium level or Avanti. Be aware that we install a small control box onto the wall of the freezer which adds about 16" to the length (control-box lid should be accessible).