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