Wood-fired heating
Wood-fired heating
Wood-fired heating is a traditional way to warm your hot tub, with lighting and tending the fire as a part of the experience. It takes time and a little attention, from adding the first logs to checking your water as it gradually warms. For those who enjoy that slower pace, preparing the soak is part of the pleasure.
Wood-fired heaters are especially well suited to cabins, rural retreats and off-grid settings, where you can heat the water without an electrical connection for the heater itself.Â
Our 26 kW wood-fired heater
Made from 316 stainless steel, our 26 kW external heater combines a spacious firebox with practical features for tending the fire.
The heat-resistant glass door gives you the opportunity to watch the fire crackle as you enjoy a soak, adding not only warmth to your water, but also the overall experience. The sliding air vent lets you easily adjust the air supply to the fire, while the ash drawer makes ash removal straightforward and mess-free.
A protective metal mesh guard surrounds the lower section of the chimney to help reduce the risk of accidental contact with the hot pipe. This provides an additional precaution, which is especially convenient for owners with children or pets.
- Heat-resistant glass makes flames part of the experience.
- Adjustable air supply
- Remove collected ash once the heater has cooled.
- Heat protecting chimney guard
A compact option for smaller tubs
Our 22 kW external heater is a compact option for smaller water volumes, recommended for our Ofuro tubs of around 650 litres. Made from the same 316 stainless steel as our 26 kW heater, it features a solid front cover with a wooden handle for comfortable handling.
The cover tilts forward and lifts out to give you access to the firebox, then slides back into place and locks into position. An adjustable air vent lets you regulate the air supply to the fire.
Much like the 26kW heater, this heater also includes a protective metal mesh chimney guard to help reduce the risk of accidental contact with the hot pipe. The heater also comes with a connection set for installation.
External heating
An external wood-fired heater sits beside your hot tub, with two connections allowing water to circulate between the tub and the heater. Keeping the firebox outside the bathing area leaves the full interior available for seating. There’s no internal stove or protective partition taking up space, giving you more room to sit comfortably with others.
The separate position also makes the heater easy to access from outside the tub. You can add wood, adjust the airflow and tend the fire without reaching across the bathing area. Once the heater has cooled, the firebox and ash drawer are ready for cleaning.
Natural circulation
As water warms inside the heater, it rises and returns to the tub through the upper connection. Cooler water from the tub enters the heater through the lower connection, creating a natural circulation loop.
This principle, also known as thermosiphon allows the wood-fired heating circuit to circulate water without an electric pump.
The external heater can be positioned beside the tub to suit your layout, within the installation requirements for connection height, pipe routing and clearances.
What is included?
Both the 22kW and 26 kW heater are supplied with the components needed to connect it to your cedar hot tub.
- 22/26 kW external heater in 316 stainless steel
- Two 1-metre chimney sections
- A 1-metre chimney heat shield
- Heat-resistant connection hoses
- Tub wall fittings
Wood-fired heating with electric comfort
A hybrid setup combines a wood-fired heater with an electric spa control system, giving you flexibility in how you heat your hot tub. When you have time to light and tend the fire, you can enjoy the slower preparation of wood-fired bathing. For everyday use, electric heating offers a convenient way to maintain your chosen water temperature without keeping a fire going.
The spa control system manages the electric heating component, providing automatic temperature control alongside the manually operated wood-fired heater. This makes a hybrid setup an appealing option if you enjoy heating with wood but also want your hot tub to fit more easily into a regular bathing routine.
Explore our hybrid heating page to learn more about the available combinations and how they suit different ways of using your hot tub.
Technical information
Compare our 22 kW and 26 kW wood-fired heaters, including firebox dimensions, materials and included components. Open the technical overview below to explore both models in detail.
