Cold Plunge FAQ

Welcome to cold plunging with Renu Therapy! Start by easing in—begin slowly and gradually progress to colder temperatures. It's crucial to acclimate your body, so avoid jumping straight into freezing temperatures. Most people start with one to two minutes and increase gradually as their tolerance improves. Listen to your body and avoid exceeding your comfort level. Pay attention to its signals. Experienced users might prefer a quick head dunk and longer hand exposure. Feel free to customize the temperature and duration based on your preferences.

Instant mood boost: Release of norepinephrine & dopamine.

Inflammation and arthritis combat: Anti-inflammatory properties.

Immune system boost: Increase in immune cells.

Metabolism boost: Supports weight loss.

Improved circulation.

Lymphatic drainage promotion.

Vagus nerve stimulation: Boosts overall well-being.

Increased thermogenesis.

Heightened discipline and focus.

Recommended duration is 5-15 minutes, varying based on tolerance and purpose. Listen to your body and proceed cautiously.

The Renu Cold Stoic 2.0 plunge tank features a deep design, catering perfectly to individuals of most shapes and sizes, accommodating those up to approximately 6'7" and 275 lbs. For individuals larger or taller, the Renu "Siberian Cold Plunge™ (Large Size)" is extended, offering ample space for cold therapy regardless of one's size. Both Renu cold tanks include a matching wood step, facilitating easy entry and exit for individuals of all sizes.

Depends on your goals. Standard: 50-59°F for 5-10 minutes. Athletes may use colder temperatures (42-50°F) for 3-6 minutes. Keep in mind that individual preferences and tolerances may vary. Our units can go down to 36°F. If uncertain about the ideal temperature for your needs, it is advisable to consult with a medical professional for personalized guidance.

Renu Therapy features a 2-part purification system that is entirely natural, eliminating the need for any chemicals. The system incorporates ozone, a potent oxidizer, in conjunction with a 10" 50-micron filter system, as well as the optional surface dirt and oil remover buoy, and a spa sanitizer mineral stick utilizing silver ions to eliminate bacteria and algae. The Renu Cold Plunge remains consistently clean, seldom needing a water change, contributing to water conservation. In contrast, other systems often rely on chemicals or frequent water changes.

The Renu Cold Plunge boasts a simple yet modern design that complements any environment, whether the lid is on or off. The integrated deck top is ideal for activities like Wim Hof breathing or meditation. All the woodwork is meticulously handmade in the US and incorporates the traditional Japanese waterproofing technique, Shou Sugi Ban (焼杉板), and handcrafted Redwood or Pacific Cedar breath deck that imparts a warm glow to your cold exposure experience.

Consider accessibility, structural support, and electricity. Can be installed indoors or outdoors on a flat, level surface. Our units require proper clearance to work properly. There are two grills/vents that require certain clearances. These clearances are necessary for both ventilation AND accessibility. The large vent requires at least 27 inches of clearance. In addition to providing necessary ventilation, the large vent provides access to the mechanic's bay which will be regularly accessed for any maintenance and repairs, such as filter changes, water changes, etc. The small vent requires at least 15 inches of clearance. In addition to providing necessary ventilation, the small vent provides access to the front of the water chiller which will be regularly accessed to set the desired water temperature. More information is available on the specification page.

This task requires only 15-20 minutes of your time; it's exceptionally straightforward. The setup process includes removing the lid, inspecting the mechanics bay, confirming valve openness, securing the chiller, and filling the tank with water. For your convenience, each unit comes with a quick start guide located inside the step stool.

Our chiller requires a standard 110v plug. Power consumption: 350-500 Watts @ 3-5.4 Amps.

Routine maintenance involves replacing filters, typically requiring a change every 2-6 weeks. The majority of customers opt for filter replacement every 2-3 weeks. The frequency of filter changes depends on usage, with increased plunge usage necessitating more frequent filter replacements. We advise water changes every 4-6 months or as necessary. If utilizing oil buoys and spa mineral sticks for water purification, it's essential to change them out after the 1-3 month lifespan. We offer maintenance videos and helpful information on our YouTube channel: @RENUTherapy and you can always give customer service a call at 714-617-2007.

The duration of the cooling process depends on factors such as ambient temperature and the initial water temperature. In hotter climates, it may take up to a day or a day and a half to achieve the desired cooling. Generally, the cooling rate is approximately 1-2 degrees per hour.

Our chiller efficiently maintains this temperature with minimal effort. Operating in cycles for energy efficiency, it runs until the set temperature is achieved, then the fan and compressor shut off. The chiller restarts when the temperature rises by 2-3 degrees to ensure consistent performance and energy conservation.

Yes, Renu Therapy tanks are designed for both indoor and outdoor use. They are built with durable materials and have an enclosed mechanic's bay to protect electrical and mechanical components. Special considerations for below-freezing temperatures, please contact customer service for winterizing protocol at (714) 617-2007.

For those who desire to go beyond the built-in ozone purification system included with all of our tanks, we offer natural mineral spa sticks, dirt/oil-absorbing buoys, and a water treatment kit. Our absorbent buoys float on top of your water and pick up particles, oils, and other contaminants floating on the surface of your water. The spa stick floats to the bottom of your tank and uses natural minerals to fight bacteria, algae, and mold. The water treatment kit enhances protection against bacteria and algae, while also maintaining water clarity. Explore these items on our website HERE

Renu offers free standard curbside shipping to your home or business in the 48 contiguous states. For Hawaii and Alaska, contact customer service to obtain a shipping quote. International shipping rates vary based on the destination; feel free to reach out for specific details at help@renutherapy.com.

Renu Therapy provides a 5-year Limited Warranty for Plastic Tanks (Cold Stoic 2.0) and a 1-year Limited Warranty for Wood Body Tanks (Cold Stoic Classic, Siberian). All components, excluding the water chiller (covered for 1 year) are covered. An optional 4-year extended warranty for the water chiller can be purchased, extending coverage to a total of 5 years. The Chiller Extended Warranty is available directly from Renu Therapy within 364 days of shipment, providing an additional 4 years of coverage beyond the original 1-year warranty.

Our Cold Stoic 3.0 features WiFi compatibility and a touch screen for advanced control options. If you prefer built-in controls, consider the Cold Stoic 2.0.

Anyone with preexisting medical conditions should consult with their doctor before participating in cold/hot water immersion.