Heaters for Wood-Fired Hot Tubs – Efficient and Durable Heating Solutions

Whether you're a hot tub manufacturer looking for a reliable heater supplier, or a DIY enthusiast building your own wood-fired hot tub, we offer a carefully selected range of heaters that meet the highest quality standards.
 

Octa Heater

Octa Heater for Wood-Fired Hot Tubs

Our most popular heater model – available in three different sizes (varying in length): S, M, and L.
Octa heaters are equipped with advanced double-flow heat exchangers that significantly improve heating efficiency by enhancing heat transfer.
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Delivery takes 7-10 working days.
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Delivery takes 7-10 working days.

  • Safety Features

  • Best Types of Firewood for UKO Heaters

  • Why Choose UKO Heaters?

Safety Features

UKO heaters are designed with essential safety features in mind. The main body of the heater remains cool to the touch, as the inner fire chamber is surrounded by a water heating chamber. This means the outer surface only heats up to the temperature of the water inside.
Additionally, the lower part of the chimney is equipped with a thermal guard for extra protection.

However, users are responsible for following basic fire safety guidelines, such as maintaining a safe distance of at least 2 metres between the chimney and any roof or flammable materials, and avoiding placing flammable items near the heater.

Best Types of Firewood for UKO Heaters

The most suitable firewood for UKO heaters is hardwood—such as oak, ash, birch, maple, or beech. These dense wood types burn slower and hotter, producing more heat with less smoke and residue compared to softwood.
Hardwood is more efficient at maintaining a steady temperature over time, making it ideal for heating UKO heaters.

For optimal combustion efficiency, it is important to use well-seasoned wood with a moisture content below 20%.

Why Choose UKO Heaters?

Safety First – Designed with key safety features to ensure secure and comfortable use.

 

Fast Heating – Efficient heat exchange system enables quick and effective water heating for your hot tub or water tank.

 

CE Certified – Complies with the highest European quality and safety standards.

 

Easy Maintenance – Simple to clean and maintain, ensuring long-term performance and reliability.

  • Heater UKO Octa

  • Features

UKO Octa outdoor heater - maximum comfort

Meet our classic outdoor heater, renowned for its reliability and versatility.

 

  • This heater fits all types of tubs - whether fibreglass, acrylic, wood or a variety of shapes including round, square and oval ofuro - ensuring a perfect fit for any size.
  • Placed on the outside of the hot tub, it frees up more space inside, allowing for a more spacious bath without the need for a larger tub.
  • Ideal for those who appreciate both timeless design and functionality, this heater maximises comfort in your hot tub.

Double-pass heat exchanger in the UKO Octa furnace

This heater model features a high-efficiency double-pass heat exchanger that delivers enhanced performance through:

  • Improved Heat Transfer
    The design extends the path of hot air, allowing for more effective water heating.
  • Doubled Contact Surface
    As hot air circulates twice through the system, the contact area between hot air and water significantly increases.
  • Lower Emissions
    Better combustion leads to reduced wood consumption and fewer emissions, making the process more eco-friendly and cost-efficient.

Support, auf den Sie sich verlassen können – vor und nach Ihrem Kauf.

Haben Sie eine wichtige Frage zu unseren Hot Tubs oder unserem Service? Unser erfahrenes und engagiertes Kundenserviceteam beantwortet Ihnen gerne alle Details, die Sie interessieren. Kontaktieren Sie uns einfach über Ihren bevorzugten Kanal.

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