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China Air Duct Heater Suppliers - High-Quality Heating Solutions from Our Trusted Factory

Air duct heaters are essential components in various industries, including HVAC systems and industrial applications in China. These heaters are designed to effectively warm air within ductwork, enhancing the outlet temperature for improved climate control. Manufactured by reliable suppliers and factories, our air duct heaters are tailored for installation through the lateral openings of ducts, ensuring optimal performance. They are classified based on operating temperature ranges—low, medium, and high—as well as air velocity—low, medium, and high—allowing for versatile applications in different environments. Choose high-quality air duct heaters from trusted China suppliers to meet your specific heating needs
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    Technical Parameters

    Air Duct Heater Introduction

    They are primarily used for heating air in air ducts and are available in three different sizes: low-temperature, medium-temperature, and high-temperature. Their common structural feature is the use of steel plates to support the heating tubes to reduce vibration, and an over-temperature control device is installed in the junction box. In addition to over-temperature protection, a coupling device is installed between the fan and heater to ensure that the heater starts only after the fan starts. A differential pressure device is installed before and after the heater to prevent fan failure. The gas pressure heated by the duct heater should generally not exceed 0.3 kg/cm². If pressures exceeding this limit are required, a circulating electric heater should be used. Low-temperature heaters heat gas temperatures no higher than 160°C; medium-temperature heaters no higher than 260°C; and high-temperature heaters no higher than 500°C.

    Temperature Classification

    Available in three sizes: Low-temperature (up to 160°C), Medium-temperature (up to 260°C), and High-temperature (up to 500°C).

    Anti-Vibration Structure

    Features steel plates supporting the heating tubes to minimize vibration, ensuring long-term structural stability.

    Safety Interlocks

    Equipped with fan-heater coupling protection, differential pressure devices, and over-temperature control in the junction box.

    Frequently Asked Questions

    Q: What are the temperature limits for the different air duct heater sizes?

    Low-temperature heaters are suitable for gas temperatures up to 160°C; medium-temperature heaters handle up to 260°C; and high-temperature heaters can reach up to 500°C.

    Q: How does the duct heater reduce vibration?

    The common structural design utilizes steel plates to support the heating tubes, which effectively reduces vibration during operation.

    Q: What safety devices prevent the heater from operating without airflow?

    A coupling device is installed between the fan and the heater to guarantee the heater starts only after the fan is running. Additionally, a differential pressure device is installed before and after the heater to safeguard against fan failure.

    Q: What is the maximum gas pressure limit for these heaters?

    The gas pressure heated by the duct heater should generally not exceed 0.3 kg/cm². If your application requires higher pressure, a circulating electric heater must be used instead.

    Q: Where is the over-temperature control device located?

    The over-temperature control device is conveniently installed inside the junction box to protect the system from overheating.