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China Air Duct Heaters from Reliable Suppliers | High-Quality Heating Solutions from Top Factory

Air duct heaters are essential components in industrial and air conditioning systems, designed to enhance the air temperature within ducts. These units are typically installed through lateral openings in the ductwork, providing efficient heating solutions for various applications. Available from top China suppliers and factories, our air duct heaters are categorized by their operating temperatures—low, medium, or high—and air velocities—low, medium, or high. By choosing our products, you can ensure optimal air heating performance tailored to your specific industrial 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.

    Frequently Asked Questions

    What are the temperature limits for the different types of air duct heaters?

    Low-temperature heaters are designed for gas temperatures no higher than 160°C; medium-temperature heaters operate up to 260°C; and high-temperature heaters can handle gas temperatures up to 500°C.

    How do air duct heaters reduce operational vibration?

    They feature a structural design that utilizes steel plates to support the heating tubes, which effectively minimizes vibration during operation.

    What safety features prevent the heater from running without airflow?

    A coupling device is installed between the fan and the heater. This interlocking safety mechanism ensures that the heater can only start after the fan has already started running.

    Why is a differential pressure device installed?

    The differential pressure device is positioned before and after the heater to monitor pressure changes and prevent system hazards in the event of a fan failure.

    What is the maximum gas pressure limit for a duct heater?

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