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Ohku Wood Fired Hot Tub

$8,495.00

The Ohku tub is the world’s first wood-fired concrete hot tub. It is generously comfortable for one, two or a small family of four. Like Japanese ofuro tubs, our soaking tub is meant for complete relaxation and reconnection, leaving you feeling nurtured by nature. The freestanding concrete tub is a low water volume design that ergonomically hugs the body, wrapping you in warmth as you lie back. The concrete finish of the tub feels smooth as silk against your skin, yet is durable enough for any season. It sits atop our beautiful floating cedar wood platform and heats in under an hour. All necessary fittings, including the stainless steel wood-fired heater and floating cedar wood platform are included with each tub, to have you soaking outdoors in no time. Elevate your outdoor space with the Ohku two-person hot tub.  

Handcrafted from Natural Materials

2-4 Person Capacity

Heats in Under an Hour

Lowest Water Volume: 60 Gallons

THE DETAILS

We've thought of it, so you don't have to.

High Efficiency Heater

External heaters are more efficient in maintaining water temperature, while keeping your tub free from ash and debris.

Low Maintenance

Our tub doesn't require any regular maintenance or upkeep. Just rinse or wipe it down after use, and you're good to go.

Ergonomic Design

Experience transformative relaxation with our smooth stone curvature, that hugs the body and reduces water volume.

Chemical-Free

Forget the pH tests and the harmful chemicals. Soak in fresh, untreated water, and water your garden when you pull the plug.

Intuitive Assembly

To make your entire experience enjoyable and relaxing, we've made sure the set up is straightforward and easy.

All-Season Use

We only use the most durable materials that can withstand the elements, so you can enjoy your tub all year long.

High Efficiency Heater

External heaters are more efficient in maintaining water temperature, while keeping your tub free from ash and debris.

Ergonomic Design

Experience transformative relaxation with our smooth stone curvature, that hugs the body and reduces water volume.

Low Maintenance

Our tub doesn't require any regular maintenance or upkeep. Just rinse or wipe it down after use, and you're good to go.

Chemical-Free

Forget the pH tests and the harmful chemicals. Soak in fresh water, and water your garden when you pull the plug.

Intuitive Assembly

To make your entire experience enjoyable and relaxing, we've made sure the set up is straightforward and easy.

All-Season Use

We only use the most durable materials that can withstand the elements, so you can enjoy your tub all year long.

Ergonomic Design

Experience transformative relaxation with our smooth stone curvature, that hugs the body and reduces water volume.

Chemical-Free

Forget the pH tests and the harmful chemicals. Soak in fresh, untreated water, and water your garden when you pull the plug.

All-Season Use

We only use the most durable materials that can withstand the elements, so you can enjoy your tub all year long.

High Efficiency Heater

External heaters are more efficient in maintaining water temperature, while keeping your tub free from ash and debris.

Low Maintenance

Our tub doesn't require any regular maintenance or upkeep. Just rinse or wipe it down after use, and you're good to go.

Ergonomic Design

Experience transformative relaxation with our smooth stone curvature, that hugs the body and reduces water volume.

Chemical-Free

Forget the pH tests and the harmful chemicals. Soak in fresh, untreated water, and water your garden when you pull the plug.

Intuitive Assembly

To make your entire experience enjoyable and relaxing, we've made sure the set up is straightforward and easy.

All-Season Use

We only use the most durable materials that can withstand the elements, so you can enjoy your tub all year long.

A luxury handcrafted piece to turn your backyard into a personal oasis. Our Concrete Wood Fired Hot Tub is a double ended freestanding tub with rounded soft edges and thick exterior walls, making it the perfect piece for your outdoor space. Its minimalistic and off-grid design doesn’t require any electricity and is the perfect addition to any home or accommodation site. 

The Ohku Tub blurs the boundaries between a wood fired hot tub, a soaking tub, and an outdoor bathtub: it functions like a wood fired hot tub, is inspired by the culture of Japanese soaking tubs, and most physically resembles that of a freestanding bathtub. Stripped of any chemicals, jets, or pumps, this wood fired soaking tub leaves the user with the raw and elemental experience of soaking in the outdoors. The experience of soaking in the Ohku Wood Fired Hot Tub is as close as you can get to a natural hot spring experience.

The Nordic-inspired cedar wood platform elevates the concrete tub to the precise height for optimum heating. The water is heated by the principle of thermosiphon, a method of passive heat exchange, based on natural convection. The water heated from the stove displaces the cold water in the tub, naturally circulating through the external stainless steel heater without the need of electricity.

The sustainable design of the tub uses only natural materials, including concrete from raw aggregate, stainless steel, and premium western red cedar wood. Red cedar wood was chosen due to its incredibly durable and naturally rot-resistant properties, and like its concrete counterpart, doesn’t require any maintenance or upkeep.

Dimension: 69.5″ L x 36.125″ W x 19.375″ H

Weight: 720 LBS

Wall Thickness: 2″

Recommended Fill Capacity: 60 GAL

Water Capacity: MAX 120 GAL

Dimensions: 25″ L x 16″ W x 18″ H

Firebox Dimensions: 18″ L x 14″ W x 10″ H

Heat exchange surface area: 9 sq. ft.

Weight: 52 LBS

Stove body: 20-gauge Grade 308 Stainless Steel

Stove front: 1/8″ Steel

Firebox Door: Cast Iron

Stove grate: Stainless Steel

Heat Output: 47,000 BTUs

Easy, no-build assembly cedar wood platform.

Dimensions: 72″ L x 47″ W x 9″ H

Our tub can be heated to temperature in under an hour with just an armful of wood. The external wood-fired stove not only heats efficiently, but also maintains the perfect soaking temperature for hours.

An ideal bath temperature can range between 90-105ºF, depending on personal preference. We recommend heating the tub up to 90ºF, and allowing it to naturally raise to your desired temperature.

Unlike other two-person hot tubs on the market, the Ohku tub uses 50% less water and can be drained after each use, so there is no need to add harmful chemicals. For a more resourceful soak, consider draining your tub into your garden beds or lawn. 

No electricity is required for our wood-fired soaking tub.

The Wood-Fired Hot Tub does not require professional installation or assembly. All you need is a flat surface and a water source. The tub can be carried by 4-6 people, and can be easily assembled by 2. 

We offer flat rate freight shipping of $500 USD to the continental US and Canada. For more information, check our Shipping Policy. For International Shipping, please contact us.

Our tubs are made to order and can take up to 6-8 weeks to manufacture.

We offer a 1 Year Limited Warranty for the Ohku Wood Fired Hot Tub and a 3 Year Limited Warranty for the External Wood Fired Heater.

Built with quality materials to last a lifetime.

Reinforced Concrete

The natural concrete mixture is incredibly durable, heat-conductive, and has insulative properties, so it will heat quickly and retain the heat as you soak for years to come.

Premium Western Red Cedar

Naturally resistant to rot, humidity, and insect damage, wester red cedar wood is one of the most durable untreated woods for outdoor use.

Stainless Steel

This high-impact resistant metal is an ideal material for outdoor wood-burning heaters, as it is long lasting and can withstand extreme high and low temperatures.

NATURALLY BEAUTIFUL

Concrete Characteristics

We’ve partnered with the leading experts in concrete manufacturing to bring you the highest quality concrete tubs that are built for the outdoors. Every wood fired hot tub is individually handcrafted to embrace the natural beauty and characteristics of concrete. Due to the natural composition of concrete, each product will have natural variations and be slightly unique. 

Holes or pockmarks on the surface of the tub is very natural and common with cast concrete, as this is the trapped air within the mixture. 

Texture and flow-lines can also occasionally occur when water is introduced to the mixture and is absorbed by the dry material.

Features

• Premium grade (308) stainless steel stove body and firebox
• Heavy steel stove front
• Cast iron door with adjustable draft
• Durable stainless steel grate
• Tub connections provided
• Generous size firebox, 18″L x 14″W x 10″H
• Vented smoke-outlet for secondary combustion
• 3/4-inch drain for freeze protection
• Ash drawer for easy removal of ashes
• Long-handled ash rake provided

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