Frequently Asked Questions

Cooling times are highly dependent on the ambient temperature, and it will usually take about 3 hours or more to reach standard cold plunging temperatures from room temperature water. The most important factor impacting cooling times is the outside temperature. If the chiller is in Arizona with an outside temperature 105 °F, it will cool the water much slower than if the chiller is in Maine with an outside temperature of ~65 °F. This is because (1) the outside air heats up the water in your cold plunge, and (2) the chiller (like an air conditioner unit) is less efficient in high temperatures because it cannot effectively dissipate the hot air it generates. Try some of the following steps to improve your cooling times: 1. Place the Denali in a well-ventilated area. The silver vents should be exposed and should have at least 3ft of open space beside them so that fresh air can enter the vents and hot air can be released in the cooling process. 2. Leave your Denali on at mid-temperature. If you would like to take your plunge at 40 °F (for example), leave your chiller on and running at ~60 °F, then set the temperature down to your desired temperature a few hours before your plunge.

The Denali comes ready to plug into any standard household 120V plug, and it draws 12 amps.

Yes, as long as the extension cord is rated for 15A or more and made specifically for outdoor use.

1.5 HP.

45db max; quieter than a standard box fan.

Warranty terms for all products are available at: www.redwoodoutdoors.com/warranty/

80 gallons.

The minimum ambient operating temperature is 23 °F. If used in temperatures lower than 23 °F, ice will form on the internal components and damage the machine. Damage caused by use in temperatures below 23 °F is not covered by the warranty. If temperatures drop below 23 °F the tub must be drained. The tub must be ON AND RUNNING consistently whenever temperatures are between 32 °F and 24 °F. If the tub is OFF with water in it and the temperature is below 32 °F, water will freeze and damage the equipment. If you want to turn your tub off when temperatures are below 32 °F, the tub must be drained.

+ Insulated foam and vegan leather lid with child-lock safety feature + New filter + Quick hose drain adaptor + Small hose attachment for drip drain + Thermowood stairs with slip resistant steps

At least once every 3 months if the tub is running consistently. If you use the tub every day, change it more often.

A filter cartridge typically lasts 6 to 12 months, however, it must be cleaned regularly to achieve this lifespan. To keep your filtration system in top working condition, we recommend cleaning it at least once per month. To clean the filter cartridge, remove it from the filter housing and place it in a bucket of water. Add a filter cleaning agent to the water and swish around to mix. Let the cartridge sit in the bucket for ~24 hours. After 24 hours, take the cartridge out, rinse, and leave it to dry. Once the filter is dried out, you can put it back in the filtration system for use. We recommend buying filter cartridges in pairs. Then when it's time to clean your filter, you can use your second cartridge. By rotating between filter cartridges, you can avoid having to stop using your plunge tub while the filter is being cleaned, and you can buy cartridges less frequently. Redwood Outdoors sells replacement filter cartridges for when your cartridge has reached the end of its life and needs a change.

The Denali has UV water sanitation built in. Chlorine/bromine tabs are not required to keep the water sanitary. Adding chlorine/bromine can corrode the equipment, and corrosion caused by chlorine/bromine is not covered under Redwood Outdoors’ product warranty.

Yes, it is very important to monitor your alkaline, pH, and calcium (hardness) levels to avoid damaging your equipment over time. Any damage due to improper water chemistry is not covered under Redwood Outdoors’ product warranty. Your Denali’s water must be checked regularly to make sure it is within the ranges below: pH: 7.2 - 7.8 Calcium: 150 - 250 ppm Alkaline: 80 - 120 ppm In most cases, you will find that you need to increase your alkalinity, decrease your pH, and increase calcium. Our Water Balancing Kit provides the chemicals and the testing strips needed to make these adjustments.

The drain has a 3/4" garden hose connection. The Denali also comes with a quick connection head to attach to the end of the drain if you have a quick connect hose. On some properties, it is more convenient to pump the water out of the tub using a ‘Submersible Utility Pump’. The benefit of a pump is that it allows you to push the water with enough force through a garden hose to reach up to 75’ away. A ¼ HP pump will work well for this. Most pumps come with adapters that allow for a direct connection to a garden hose.

The chillers work exactly like an air conditioner, except with water as the working fluid instead of air. Water is pumped out of your tub and through a heat exchanger. In the heat exchanger, the water’s temperature is lowered by evaporating a refrigerant. The cooled water is then sent back to your tub and the refrigerant is condensed in the radiator so that it can be reused.

Having space for ventilation is very important. If the system is not properly ventilated and overheats, it will automatically shut off. There should be at least 3ft of space around the metal grates to allow enough room for air to circulate and the hot air to escape from the machine. If you find your machine is turning off, it may be because the ventilation is not sufficient and the machine is overheating.

Yes! Please check out the cold plunge accessories page or speak with a sales representative for more details.

Yes, once your mobile device is paired with the Denali, you can use the app from anywhere as long as your tub is still in range with the Wi-Fi and the signal is strong.

Yes, the tub has an Economy mode setting which allows you to set specific times for the heating/cooling functions to be running. You may also set your tub to turn on and off at scheduled times throughout the week to help save power with the Denali’s scheduling function in the mobile app.

If you have a weak signal where your tub is located, a Wi-Fi extender may help.