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China Air Duct Heaters - High-Quality Suppliers and Factory Options for Industrial and HVAC Applications

Air duct heaters are essential components in industrial and HVAC applications, designed to effectively heat air within ducts to enhance outlet temperatures. Commonly utilized in air conditioning systems and various industries, these heaters are typically installed through a lateral opening in the duct. Our factory specializes in manufacturing high-quality air duct heaters that meet diverse operational needs, categorized by operating temperature (low, medium, or high) and air velocity (low, medium, or high). As a leading supplier in China, we are committed to providing reliable and efficient heating solutions tailored to meet the specific requirements of our customers
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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.

    Temperature Ranges

    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.

    Vibration & Control

    Steel plates are used to support the heating tubes to reduce vibration, and an over-temperature control device is installed in the junction box.

    Safety Interlocks

    A coupling device ensures the heater starts only after the fan starts. Additionally, a differential pressure device is installed before and after the heater to prevent fan failure.

    Pressure Limits

    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.

    Frequently Asked Questions (FAQ)

    What are the different temperature classifications for air duct heaters?

    Air duct heaters are classified into three temperature ranges: low-temperature heaters (up to 160°C), medium-temperature heaters (up to 260°C), and high-temperature heaters (up to 500°C).

    How does the air duct heater reduce structural vibration?

    The heater utilizes steel plates to support the heating tubes, which effectively minimizes vibration during operation.

    What safety features prevent the heater from operating without the fan?

    A coupling device is installed between the fan and the heater, ensuring that the heater can only start after the fan is running.

    How is fan failure detected and managed?

    A differential pressure device is installed before and after the heater to detect and prevent issues arising from fan failure.

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

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