Outdoor Cedar or Thermowood Hot Tub With External Firewood Heater and Cover

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Shym Saunas offers Cedar Hot Tubs Kits in Australia, representing all the luxury and comfort of a Hot Tub at a more affordable price. This Outdoor Cedar or Thermowood Hot Tub With External Firewood Heater and Cover is an easy-to-assemble DIY outdoor Hot Tub. Assembly can be accomplished in just a few hours and is very easy to do.

Outdoor Cedar Hot Tub With External Firewood Heater and Cover

Made with high-quality materials, outdoor wood-fired hot tubs are sure to become the highlight of any home. They are perfect for hosting friends and family and offer a great opportunity to bond and get to know each other better.

Unwind in style & feel revitalised with your loved ones in a cedar hot tub

At Shym Saunas we believe that hot tubs are not only good for anyone’s well-being but are also essential to creating a setting where we could relax, connect and have a conversation. Saunas and Hot Tubs are the best way to unwind, relax and spend quality time with those we love, our families, and friends.

Our Outdoor wood-fired hot tub is large enough to accommodate 2 to 10 people. We offer 3 standard sizes:

  • 1,500mm – 4 – 5 person 
    1,800mm – 6 – 7 person 
    2,100mm – 8 – 10 person 

2 height options are available:

  • 900mm and 1,200mm

Highlighted Features

Wood-Burning Hot Tubs: Luxury at Low Expense

Wooden hot tubs tend to be more affordable than acrylic or rotomolded spas, especially if you go with a DIY wood fired cedar hot tub kit. This way, you can have a great quality wooden tub without spending too much money.

2 people having a good time on a outdoor cedar hot tub
outdoor cedar hot tub

High-grade Canadian Western Red Cedar

Our products are made from high-quality Canadian Western Red Cedar that is naturally endowed with a sweet aromatic scent and the ability to avoid fast decay. Having a thickness of around 1.5 inches (3.85 centimeters), the cedar wood is an excellent choice for outdoor hot tubs and wood-burning hot tubs due to its natural properties and high insulating values.

Outdoor Cedar or Thermowood Hot Tub With External Firewood Heater and Cover

High-grade Thermo-treated Hemlock

Optionally you can choose thermo-wood as a material for your hottub. It is created by heat-treating hemlock timber to temperatures ranging from 180 – 230° in special chamber kilns for up to 96 hours

  • It is dimensionally stable
  • Resistant to growth of fungi and rotting 
  • Average life span is prolonged meaning your hottub will last longer! 
  • Better insulation properties

Heat Treated Timber Planks

For the perfect home spa experience, you need more than just hot water. You need comfortable, durable, and dimensionally stable hot tub wood that can stand up to years of use. That’s why our wooden hot tubs are manufactured with heat-treated timber planks giving them increased resistance to dimensional changes, rot, and insect infestation.

Heat Treated Timber Planks
Outdoor Cedar or Thermowood Hot Tub With External Firewood Heater and Cover

Comes with an External Wood-Fired Heater

The full-glass sauna doors are made from tempered glass and are actually able to withstand high temperatures and splashes of water better. The cabin door is specifically developed for saunas and therefore is much more effective than a regular door would be. The door glass is reinforced with an extra 8 mm thick layer of safety glass, making it sturdy and long-lasting. Plus, the glass has a clear tone that creates an inviting and calming ambiance. It gives a greater impression of light and space while also being safe and secure.

High-Density Polystyrene Foam For Our Thermal Covers

We utilise only high-density polystyrene foam for our thermal covers. Our unique cover design provides superior heat retention and durability. Made of U.V. resistant marine grade vinyl and Chlorine resistant plastics. Utilises lockable safety clip mechanism.
Outdoor Cedar Hot Tub With External Firewood Heater and Cover
stainless steel straps for hot tub


Straps and other metal parts are made of 304# stainless steel.


outdoor cedar hot tub material

Hot Tub​

Cedarwood or Redwoods has straight fibrous strands that absorb water, causing it to expand equally and form a permanent water-tight seal. They also have excellent resistance to decay and have a natural, inviting scent.
Outdoor Cedar or Thermowood Hot Tub With External Firewood Heater and Cover

Stainless Steel​

The straps, heater, and other metal parts made from 304# stainless steel have excellent corrosion resistance properties

External wood-fired heater

The wood-fired heater is situated outside the wooden hot tub which makes it easier to operate, maintain, and clean.

  • The heater is made of stainless steel (AISI304) making it resistant to rusting and corrosion.
  • External heater gives extra space for 2 more people inside the hot tub.
  • Power: 16 KW
  • L × W × H = 580 mm × 360 mm × 540 mm
  • Chimney length: 2m
specifications for hottub firewood heater


Each kit includes the following items:

  • A wood-fired external stainless-steel heater and chimney
  • Stainless steel tightening straps
  • Wooden Benches
  • Wooden steps
  • Plumbing accessories including inlet and outlet pipes, valves, connections
  • High-density polystyrene foam thermal insulation cover
  • Assembly manuals and instructions and installation video


  • Pick Up is available from the warehouse at no additional cost.
  • We can deliver within Tasmania for an additional charge of $300-$500.
  • We offer an interstate freight of $500-$1000 (please contact us for details).



Wood-burning Western Red Cedar hot tubs are eco-friendly, sustainable, durable, and beautiful firewood tub.

That’s right. Cedar wood is an incredible wood that’s naturally rot and insect-resistant, making it ideal for both indoor and outdoor hot tubs. It’s also one of the most carbon-neutral building materials available, as it sequesters carbon throughout its life cycle.

Western Red Cedar is one of the best green building materials. Its timber is produced from sustainable processes in Canada with only less than ⅓ of 1% of the Columbia region’s Cedar that’s harvested per year. With each tree taken down for sauna or hot tub manufacturing, 3 are replanted.

eco friendly sauna and hot tubs
Spend Family Time in hot tub

Spend Family Time for Less

Whether you’re soaking up the sun in the summer or enjoying the crisp air of winter, a wood-burning hot tub is a great way to relax and rejuvenate with your family and friends.

No Required Electricity Means No Electricity Bills

Wood-burning hot tubs do not require an electrical connection with just some fire wood needed to make it work. This means, that not only will you be experiencing the steady, natural-feeling warmth of the tub, but also the relief of not paying any utility bills! As a result, wood-burning stoves are a preferred method for many people. In addition, wooden hot tubs can be enjoyed in the areas where there is simply no power available.

hot tub wood fired heater

Cheaper Than Any Form Of Outdoor Entertainment

A wooden hot tub is a more cost-effective and stylish option for anyone looking to add some recreational value to their home. The initial investment for a medium-sized cedar hot tub with all the necessary accompanying equipment like pumps, heaters, and filters would be about two to three thousand dollars less than that of an inground swimming pool.

Moreover, the chemicals required to maintain pH-balanced water in a hot tub are also relatively cheaper than those used for a pool.

Most importantly, while an inground swimming pool requires professional help for both installation and maintenance, setting up a hot tub is relatively easy and does not demand too much time commitment either.

Style your Deck/Backyard

Outdoor living spaces are important for your well-being and should be taken advantage of. With today’s hectic lifestyles, being surrounded by traffic, buildings, and people can be stressful. Having a lovely wooden outdoor hot tub or sauna can offer you the essential calmness and balance you need in your life.
Style your Deck, Backyard with hot tubs
Australian wooden hot tubs are the perfect addition to any backyard. They blend perfectly with the natural surroundings and can add a touch of luxury to any home. The tubs are made from high-quality wood, and each one is handcrafted to ensure the highest level of quality. So go ahead and refurbish that dull, empty deck today!
Style your Deck, Backyard with hot tubs (2)