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Engineering the Future: Designing and Retrofitting Comtherm Burners - Spray Booths and Powder Coating Ovens

Engineering the Future: Designing and Retrofitting Comtherm Burners - Spray Booths and Powder Coating Ovens


In the industrial sector, the choice of burners can significantly impact the efficiency and quality of processes such as spray painting and powder coating. With nearly five decades of manufacturing expertise, Comtherm has emerged as a reliable name in the realm of industrial process burners. This comprehensive guide aims to assist engineers and decision-makers in designing or retrofitting Comtherm burners for spray booths and powder coating ovens.

The Comtherm Advantage

Comtherm burners are engineered to fire a variety of commercial gases, including LPG and natural gas, as well as low-calorific gases like syngas and hydrogen. This flexibility makes them ideal for a wide range of industrial applications. Moreover, they are designed for high efficiency, low emissions, and ease of maintenance. Comtherm also offers burners for distillate oils, and units are available in dual and multi-fuel variants.

Key Features

  • High Efficiency: Optimised for maximum fuel-to-heat conversion.
  • Low Emissions: Engineered to meet stringent environmental standards.
  • Robust and Reliable: Built for longevity and minimal maintenance.
  • Fuel Versatility: Capable of firing multiple types of fuel.
  • Technical Support: Backed by a team of experts who use the products they sell.

Applications in Spray Booths and Powder Coating Ovens

Spray Booths

In the context of spray booths, the focus is often on air replacement plants and large spray or drying rooms. Comtherm's in-duct line burners are particularly well-suited for these applications. Their design ensures uniform heat distribution, which is crucial for the even curing of paint or coatings.

Powder Coating Ovens

For powder coating ovens, temperature uniformity and control are paramount. Comtherm burners offer the precision required to ensure that the powder adheres and cures uniformly, thereby guaranteeing the quality of the finished product.

Sizing Burners for Your Application

Burner Capacity

Once the heat load is calculated, the next step is to select a burner with a capacity that matches or slightly exceeds the heat load. It's advisable to have a bit of extra capacity for unforeseen circumstances or future expansion.

Turn-Down Ratio

The turn-down ratio is the ratio of the maximum to minimum heat output of the burner. A higher turn-down ratio offers greater flexibility in controlling the heat output, which is particularly useful in applications requiring precise temperature control.

Nuances of Requirements

Airflow Considerations

In spray booths, proper airflow is essential for removing fumes and overspray. Therefore, the burner must be compatible with the booth's exhaust system. Inadequate airflow can lead to uneven heating and potential safety hazards.

Zoning and Safety

For both spray booths and ovens, zoning is crucial. The burner should be capable of delivering heat uniformly across different zones within the application. Additionally, safety features like flame failure devices and over-temperature protection should be considered.

Fuel Efficiency

Given the rising costs of fuel, selecting a burner with high fuel-to-heat conversion efficiency is economically beneficial. Comtherm burners are designed for high efficiency, making them a cost-effective choice.

Emission Compliance

Ensure that the selected burner complies with local and international emission standards. Non-compliance can result in legal repercussions and potential downtime.

Control Systems

Advanced control systems can offer real-time monitoring and adjustments, thereby optimising the performance of the burner. Features like PID controllers and programmable logic controllers (PLCs) can add a layer of sophistication to your setup.


Selecting the right burner is a critical decision that involves multiple factors, from sizing to nuanced requirements like airflow and zoning. Comtherm, with its extensive range and technical support, offers a holistic solution for engineers and decision-makers. By following this comprehensive guide, you can ensure optimal performance, safety, and efficiency in your spray booths and powder coating ovens.

Ready for a Burner That Fits Your Needs?

With Comtherm, you get more than just a product—you get a partner. Our technical team is here to help you design a burner system that's just right for you.

Why go generic when you can go custom?

Reach out to us today and find out how we can make your industrial processes better.

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