• Redwood Outdoors Duo 2 person outdoor sauna, made of hemlock wood with a glass door front view
  • Redwood Outdoors Alaskan All-In_One Cold Plunge Tub made of heat treated wood exterior view with the lid off and stairs.
  • Redwood Outdoors Duo 2 person outdoor sauna, made of hemlock wood with a glass door with a person sitting inside at night
  • Redwood Outdoors Duo 2 person outdoor sauna, made of hemlock wood an interior view of two people sitting on a sauna bench.
  • Redwood Outdoors Duo 2 person outdoor sauna, made of hemlock wood with a glass door interior view from the back of the sauna looking above
  • Redwood Outdoors Duo 2 person outdoor sauna, made of hemlock wood interior view from above.
  • Redwood Outdoors Alaskan All-In_One Cold Plunge Tub made of heat treated wood exterior view with the lid off on a wood deck.
  • Redwood Outdoors Alaskan All-In_One Cold Plunge Tub made of heat treated wood exterior lifestyle view with a person in the tub with water.
  • Redwood Outdoors Alaskan All-In_One Cold Plunge Tub made of heat treated wood exterior lifestyle view with a person in the tub with three other people outside of the tub.

Duo Outdoor Sauna x Alaskan All-In-One Cold Plunge

Duo Outdoor Sauna x Alaskan All-In-One Cold Plunge

$12,199.00
$12,899.00 $12,199.00
Sale Currently Out of Stock
Shipping calculated at checkout.
Shipping calculated at checkout.
See Product Specifications

Create the perfect urban sauna retreat. The Duo Outdoor Sauna’s compact minimalist design fits well into any outdoor space, seating two people comfortably. Couple with the Alaskan All-in-One, a cold plunge barrel reimagined with a built-in ultra efficient dual heater and chiller. Both make the ideal pair to transform any urban backyard or rooftop garden into a wellness oasis. ​

  • Modern design rooted in Scandinavian tradition; the Duo Outdoor Sauna heats up quickly and retains that heat thanks to the energy-efficient gravity ventilation system, ensuring you get the most out of each session.​
  • Plunge hot or cold with the Alaskan All-In-One, chill the plunge tub to as low as 37°F and take an invigorating dip or heat up to 104°F for a relaxing soak.​
  • Built from heat-treated hemlock, naturally durable and made to withstand the outdoors with minimal maintenance.​
  • Experience contrast therapy at home; relax in the sauna and then take an invigorating dip in the cold plunge, improve circulation, reduce stress, enhance recovery, and support mental resilience in your own outdoor space.​
  • Easy to assemble, the sauna kit comes together simply with some basic DIY skills, no extra cutting required, while the cold plunge is ready to plug in, fill with water and plunge away.​
  • Create rejuvenating sauna sessions with steam, every one of our heaters are designed to have water poured over the rocks to make a cleansing environment; made better with essential oils.​

Read Product Details

Create the perfect urban sauna retreat. The Duo Outdoor Sauna’s compact minimalist design fits well into any outdoor space, seating two people comfortably. Couple with the Alaskan All-in-One, a cold plunge barrel reimagined with a built-in ultra efficient dual heater and chiller. Both make the ideal pair to transform any urban backyard or rooftop garden into a wellness oasis. ​

  • Modern design rooted in Scandinavian tradition; the Duo Outdoor Sauna heats up quickly and retains that heat thanks to the energy-efficient gravity ventilation system, ensuring you get the most out of each session.​
  • Plunge hot or cold with the Alaskan All-In-One, chill the plunge tub to as low as 37°F and take an invigorating dip or heat up to 104°F for a relaxing soak.​
  • Built from heat-treated hemlock, naturally durable and made to withstand the outdoors with minimal maintenance.​
  • Experience contrast therapy at home; relax in the sauna and then take an invigorating dip in the cold plunge, improve circulation, reduce stress, enhance recovery, and support mental resilience in your own outdoor space.​
  • Easy to assemble, the sauna kit comes together simply with some basic DIY skills, no extra cutting required, while the cold plunge is ready to plug in, fill with water and plunge away.​
  • Create rejuvenating sauna sessions with steam, every one of our heaters are designed to have water poured over the rocks to make a cleansing environment; made better with essential oils.​

Also Consider: Duo Outdoor Sauna x Denali Cold Plunge

Alaskan All-in-One Cold Plunge Kit (Types)
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Product Details

Product Description

Transform your backyard into a personal wellness haven with our Fire & Ice bundle, featuring the compact Duo Sauna and the powerful Alaskan All-In-One Cold Plunge Kit.

Designed for two, the Duo Sauna delivers an intimate, traditional sauna experience in a sleek, space-saving footprint. Its efficient layout and clean lines make it ideal for small patios, decks, or urban outdoor spaces—without sacrificing heat performance or comfort.

After your sauna session, refresh in the Alaskan All-In-One Cold Plunge. Engineered for high performance and ease of use, this plunge tub delivers the full benefits of contrast therapy—supporting muscle recovery, circulation, and deep relaxation.

The Power of Contrast Therapy

Maximize recovery and relaxation with the Fire & Ice routine:
✔️ Boost circulation & cardiovascular health by alternating between hot and cold
✔️ Enhance muscle recovery after workouts or intense physical activity
✔️ Reduce stress & improve sleep by activating the parasympathetic nervous system
✔️ Support mental resilience through controlled cold exposure

What’s Included in the Fire & Ice Bundle?

Duo Sauna (2-Person)

  • 6kW Harvia KIP Heater: Reliable and efficient, with multiple upgrade options available
  • Heater Upgrade Options:
    • 8kW Harvia KIP
    • 8kW Harvia KIP with Wi-Fi
    • 6kW Harvia Spirit with Wi-Fi
    • 8kW Harvia Spirit with Wi-Fi
    • 9kW Homecraft H-Series
    • 9kW Homecraft H-Series with Wi-Fi
  • Harvia Sauna Rocks: Deliver gentle, consistent heat for an authentic sauna experience
  • Bulkhead Light: Casts a soft, ambient glow to enhance relaxation
  • Traditional Felt Sauna Hat (1): Retains heat while protecting your scalp from high temperatures
  • Towel Peg: Convenient storage for towels or robes
  • Shingles: Extra weather protection for outdoor sauna installations
  • Redwood Outdoors Doormat: Exclusive accessory included with sauna purchase only

Alaskan All-In-One Cold Plunge 

  • Control Options
     – Wi-Fi Model: Remotely control temperature via smartphone or tablet
     – Standard Model: Local digital control for on-site adjustments
  • Stained Finish: Rich, pre-sealed finish for added protection and convenience
  • Heat-Treated Hemlock Exterior: Heat-treated for enhanced durability, stability, and resistance to moisture
  • Balboa CLIM8ZONE™ Deluxe Dual Heater + Chiller: High-efficiency cooling and heating from 37°F to 104°F
  • Built-In UV Water Sanitation System: Maintain clean and clear water effortlessly with the advanced UV sanitation system, ensuring a hygienic and pleasant plunge every time
  • Insulated Vegan Leather Lid with Child Safety Lock: Helps retain temperature and ensures safety
  • Built-In Non-Slip Steps: Clean, integrated access built directly into the structure with grooved stairs for safe entering and exiting
  • Chiller Filter Cartridge (1): Keeps your water crystal clear and clean

For more details or to purchase, call 1-800-567-8036.

Product Specifications

Product Diagrams

Specifications - Sauna

Seating Capacity

2 people depending on the seating arrangement as well as the size and proximity of the bathers
Wood Type

Canadian Thermowood
Exterior Dimensions

62 ¾” L x 50 ¾” W x 82 ¾” H with trim installed
Weight

910 lbs
Accessories Included
Sauna rocks, light fixture, and shingles
Door

Tempered glass door included
Porch

Front step sold separately
Number of Cradles

2
Electrical Requirements

120V for lighting and 240V for heater
Light Fixture Dimensions

9" L x 9 ¼ W x 7" H

Specifications - Cold Plunge

Seating Capacity

1 person
Wood Type

Canadian Thermowood
Exterior Dimensions

57" L x 44" H x 37" W
Dry Weight

360 lbs
Max Water Volume
104 gallons
Liner

Moulded acrylic (white)
Chiller Type

Balboa Clim8zone™ Deluxe Dual Chiller + Heater Included
Electrical Requirements

120V, 60Hz, 12A Max (compatible with US standard household outlets)
Cooling Capacity

Cools water down to 37F
Heating Capacity

Heats water up to 104F
Dual Chiller + Heater Decibel Level

45db max
Clim8zone™ Horse Power

1.5 HP
Operating Temperature Range

32°F -110°F
Cold Plunge Lid

Vegan leather lid with childlock safety feature
Tub Drain Connections

Drip drain for condensation; Collapsible drain with 3/4" garden hose connection for tub draining
Filter

1 filter included

Packaging & Shipping Information - Sauna

Shipping Format Wooden crate
Shipping Dimensions 76” L x 50” W x 24” H

Packaging & Shipping Information - Cold Plunge

Shipping Format Wooden crate
Shipping Dimensions 61" L x 41" W x 50" H

 

 

Heater Options & Power Requirements

We have carefully selected the very best heaters to pair with our saunas, ensuring an exceptional experience no matter which option you decide on. When making your selection, consider factors such as design, Wi-Fi versus manual control, steam type, and power requirements. Choosing the right heater is the next step in building your dream sauna oasis.

Important: All heaters must be installed by a certified electrician. We recommend obtaining at least two quotes from qualified providers.

Questions? Our Product Experts are available for help! Call us at 1-800-567-8036.
Harvia KIP

A traditional Finnish wall-mounted heater with dual manual controls, including a delay timer that can be set up to 8 hours in advance. Its split-face stones deliver gentle, classic bursts of steam.

Wattage: 6kW & 8kW

Voltage: 240V

Amps: 30A (6kW) & 40A (8kW)

Wi-Fi: Optional upgrade with the 8kW

Mounting Type: Wall mounted

Rock Capacity: 44 lbs.
Harvia Spirit

A sleek, modern heater with a curved design and Wi-Fi control. Its open-stone design holds a generous volume of stones, delivering soft, even heat and rich steam.

Wattage: 6kW & 8kW

Voltage: 240V

Amps: 30A (6kW) & 40A (8kW)

Wi-Fi: Standard

Mounting Type: Wall mounted

Rock Capacity: 99 lbs.
Harvia Virta

Our most powerful heater, built for frequent use and exceptional performance. This heater delivers steady heat and abundant steam with the added convenience of Wi-Fi control.

Wattage: 8kW & 10.5kW

Voltage: 240V

(10.5kW 208V 3-phase commercial model available upon request)

Amps: 40A (8kW) & 50A (10.5kW)

Wi-Fi: Standard

Mounting Type: Floor standing

Rock Capacity: 132 lbs. (8kW) & 176 lbs. (10.5kW)
Homecraft Revive

The largest heater in our Homecraft lineup, built for the ultimate sauna experience. Producing powerful, consistent heat and generous steam when water is poured over the stones.

Wattage: 9kW

Voltage: 240V

Amps: 50A

Wi-Fi: Optional upgrade available

Mounting Type: Floor standing

Rock Capacity: 220 lbs.
Homecraft H-Series

Built for both performance and dependability; offering a balance of power and refined design. Engineered for efficient heat distribution, simple controls and light bursts of steam.

Wattage: 9kW

Voltage: 240V

Amps: 50A

Wi-Fi: Optional upgrade available

Mounting Type: Wall mounted

Rock Capacity: 44 lbs.

 

About Our Heat-Treated Lumber

Made of Hemlock 

Our saunas and cold plunge tub exterior are made of hemlock, chosen for its natural ability to insulate, resist moisture, and withstand the elements. In hot environments, hemlock remains cooler to the touch and retains heat more effectively than cedar. All the hemlock we use is sourced from responsibly managed forests in Canada that adhere to strict environmental and social standards.  

Heat-Treated for Exceptional Durability 

Our hemlock undergoes a specialized thermal modification process to increase durability. This three-phase process begins with kiln-drying the wood, followed by heating it to temperatures above 400°F (204°C), finished by slowly cooling through a controlled steaming process. This procedure changes the wood on a cellular level, compressing its internal channels to create a denser structure. The result is a stronger material that is better protected against damage from environmental factors such as weather and insects. The natural moisture resistance of hemlock is also enhanced, preventing swelling and warping over time. 

All Natural, Built to Last 

Our thermal modification process relies solely on heat and water—no chemicals involved. This technique increases the lifespan of your wood naturally, without the use of any additives. 

Caring For Your Cold Plunge

Regular maintenance is needed to keep your cold plunge running in peak condition. The built-in UV sanitation system kills most bacteria, but routine water testing, chemical balancing, filter cleaning, and water replacement is still needed.  
Please refer to your Cold Plunge User Manual for detailed instructions on how to perform routine maintenance tasks. 

Recommended Water Maintenance: 

  • Once a week - test the water to maintain the proper alkaline, pH, and calcium (hardness) levels, adjusting with the appropriate treatments to keep the water within a recommended range. Our Water Balancing Kit provides the chemicals and the testing strips needed to make these adjustments.  
  • Once a month - clean the water filter by soaking it in a filter cleaning agent for 24 hours, then rinse and air dry before reinstalling. Tip: We recommend keeping an extra filter on hand to be swapped out during the cleaning process, reducing the down time of your cold plunge.  
  • Every 3 months - drain the tub and change the water. While the tub is empty, wipe the acrylic liner with a microfiber cloth and soapy water.  
  • Every 6-12 months - replace the water filter to maintain optimal water quality.   
 

Winter Usage 

Your Cold Plunge has a built-in dual heater/chiller and can be used throughout the seasons, whether you are taking an invigorating cold dip or a warm soak. However, when outside temperatures start to dip below freezing, it is time to winterize your tub to protect it from damage.  
When temperatures drop below 32°F, you must winterize your cold plunge to avoid ice forming in the internal components and damaging the equipment. Damage caused by use in temperatures below 32 °F is not covered by the warranty. 
Please follow your Cold Plunge User Manual for detailed instructions on how to winterize your model of cold plunge. 

Delivery Day: What to Expect

Redwood Outdoors saunas and cold plunge tubs are shipped using freight delivery to ensure safe, secure transport from our warehouse to your home. Below is everything you need to know about shipping and what to expect on your delivery day.

How Redwood Outdoors Products are Shipped

Our saunas and cold plunge tubs are shipped in durable wooden crates designed to protect the product during transit. 

  • With the shipment of a sauna, the heater, rocks and accessories will either arrive in a box strapped to the top of your crate or arrive separately.

We partner with multiple trusted freight carriers to ensure your order arrives safely and efficiently at your curbside. 

  • Once your shipment leaves our warehouse, you’ll receive an email with a tracking number and link to follow your delivery.  

If you’ve ordered multiple large products—such as a sauna and a cold plunge—they may arrive in separate shipments.  

Freight Delivery 

Our shipments are delivered by a large freight truck, typically equipped with a liftgate. This allows the carrier to lower the crate to ground level upon arrival.  

  • If your delivery location has limited access for large trucks—such as steep, unpaved, gated, or restricted roads—please contact our customer service team before shipment so we can review access requirements and help you prepare.  

Delivery Day

Your shipment is on the way, here's how to prepare. 

Once your order arrives at the carrier’s local depot, they will contact you to schedule a delivery appointment. 

  • Appointments are typically scheduled within 2–3 business days of arrival at the depot.  
  • Please ensure that someone is available to receive and sign for the delivery when it arrives at your home. 
    • If your heater is shipped separately, a signature will be required for that shipment as well.  

All freight shipments are curbside delivery, meaning the crate is placed at the end of your driveway or nearest accessible location.  

  • For liability reasons, freight carriers are unable to move shipments beyond the curb or into backyards, garages, or other areas of the property.  If you need help relocating your crate after delivery, we recommend arranging assistance in advance.

Questions about shipping or delivery?

Please contact us. Our customer support team is happy to help.

Call: 1-800-567-8036 

Email: support@redwoodoutdoors.com

Warranty Information

Our wooden saunas are backed by a 1-year limited warranty. For Harvia sauna heaters, we offer a 1-year warranty on heating elements and a 5-year limited warranty on other components for residential use. For Homecraft sauna heaters, we offer a 2-year limited warranty for residential use.

Our cold plunge tubs and cold plunge chiller systems are backed by a 1-year limited warranty.

For full details and terms of our product warranties, please visit: https://www.redwoodoutdoors.com/warranty

Assembly & Manuals

Easy DIY Installation

Designed for Hassle-Free Assembly

Our saunas and cold plunges are designed for easy DIY installation, with no cutting, modifications, or special skills required. Each sauna kit includes pre-cut, interlocking panels that fit together precisely, allowing you to assemble your sauna in just a few hours using basic construction skills.

Our cold plunges arrive ready to use; just unpack, plug-in, fill with water, and plunge away.

Every sauna ships with a printed assembly manual inside the crate, tailored specifically to your model, always follow these instructions during installation. If you'd like to preview the process ahead of time, digital assembly manuals and assembly videos are available online here.

Cold plunge manuals are available online. You can find cold plunge user manuals here.

Before You Begin Installation

Review Instructions and Gather Supplies

Before you begin installation, carefully read through your assembly manuals and gather all necessary supplies.

Required Tools

Sauna and cold plunge set ups require common household tools; this includes some of the following:

Tools for Sauna Assembly:

  • Power drill with T20 ("torx") bit
  • Rubber mallet
  • Hammer
  • Two adjustable wrenches
  • Measuring tape
  • Level

Tools for Cold Plunge assembly:

  • Screwdriver
  • Scissors

Choose the Right Location

Select a stable, level location with sufficient clearance for assembly and access. Be sure the area allows for proper drainage and has convenient access to electricity. Thoughtful site selection helps ensure safe operation and long-term durability.

Check Local Building Requirements

Depending on your location, a building permit or HOA approval may be required to build a sauna. Always check local regulations before installation.

Hire an Electrician

A trusted licensed electrician must be hired to install your sauna heater. Sauna heaters do not plug in to standard outlets and must be hardwired to your electrical panel.

Build a Solid Foundation

A solid, level base is essential for the longevity and performance of your sauna and cold plunge.  
For Saunas  
Recommended foundation types include:  
  • Concrete pad or concrete footings under each sauna cradle   
  • Solid deck or reinforced platform  
  • Compacted gravel base  
  • Level stone or paver patio  
The foundation must support the full weight of the sauna and all occupants.  
For Cold Plunges  
Recommended foundation types include:   
  • Level concrete pad   
  • Reinforced deck or platform   
  • New vinyl or laminate surface   
  • Sturdy ceramic or tile floor   
  • Level stone or paver patio  
The foundation must support the full weight of the cold plunge, water, and occupant.    

Setting up your Fire & Ice Bundle

Our designs are always evolving. Please refer to your user manual when you are ready to begin setting up your sauna and cold plunge.


Our customer support team is available to assist with questions before, during, or after installation.

Call: 1-800-567-8036 

Email: support@redwoodoutdoors.com


Ignite & Invigorate

Experience the revitalizing power of heat and cold—designed for total balance, recovery, and renewal.

Wellness that Fits

Compact or spacious, our Fire & Ice packages are designed to adapt to your space and routine.

Elevate Your Recovery

Soothe, energize, and reset—harness the power of contrast therapy for total mind-body wellness.

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