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Air Duct Heater

 Air duct heaters are used in industrial ducts, air conditioning ducts, and various other industries. They heat the air to increase the outlet temperature. They are generally inserted into the lateral opening of the duct. They are categorized by operating temperature: low, medium, or high; and by air velocity: low, medium, or high.

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    Technical Parameters
    Application
    Technical Features

    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.

    Application

    Electric duct heaters are primarily used to heat air from an initial temperature to the desired temperature. They are widely used in many scientific research and production laboratories, including those in the aerospace, weapons, chemical, and university sectors. They are particularly suitable for automatic temperature control and testing high-flow, high-temperature integrated systems and accessories. Electric air heaters have a wide range of applications: they can heat any gas, and the hot air they produce is dry, moisture-free, non-conductive, non-flammable, non-explosive, and non-chemically corrosive. They are highly effective and provide a rapid (controllable) temperature rise in the heated space.

    Technical Features

    1. They can heat air to very high temperatures, up to 450°C, while maintaining a shell temperature of only around 50°C.
    2. Efficiency: Over 0.9.
    3. High heating and cooling rates, up to 10°C/s, with fast and stable regulation. They eliminate temperature drift caused by temperature lead or lag, making them ideal for automatic control.
    4. Excellent Mechanical Properties: it exhibits superior mechanical properties and strength compared to any other heating element under the impact of high-pressure air flow. This makes it particularly suitable for testing systems and accessories that require continuous air heating for extended periods of time.
    5. Durable, with a service life of decades when used within specified procedures.
    6. Clean air and compact size.