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Duct Heater

Duct Heaters represent advanced air heating technology specifically engineered for direct installation in air handling units, HVAC systems, and industrial ductwork to efficiently heat non-pressurized air streams. These sophisticated heating assemblies are designed to provide rapid thermal response, uniform airflow heating, and exceptional energy efficiency in demanding air treatment applications. The innovative design enables seamless integration into existing ductwork while delivering precise temperature control and optimal heating performance for diverse industrial and commercial air heating requirements.

Fast thermal response

Low pressure drop designs

High watt density up to 40 W/in²

  • Energy-efficient operation with optimized heat transfer design
  • Corrosion-resistant materials for harsh industrial environments
  • Modular design enabling easy maintenance and element replacement
  • Custom shapes and configurations for specific applications
  • See all 14 features
Overview

Product Description

Duct Heaters represent advanced air heating technology specifically engineered for direct installation in air handling units, HVAC systems, and industrial ductwork to efficiently heat non-pressurized air streams. These sophisticated heating assemblies are designed to provide rapid thermal response, uniform airflow heating, and exceptional energy efficiency in demanding air treatment applications. The innovative design enables seamless integration into existing ductwork while delivering precise temperature control and optimal heating performance for diverse industrial and commercial air heating requirements. Manufactured using premium-grade materials and advanced engineering techniques, these heaters are available in multiple configurations including open-coil designs featuring NiCr resistance elements, straight tubular elements with MgO insulation, and finned-tubular elements for enhanced convective heat transfer. Each configuration is optimized for specific air heating applications, providing superior thermal performance while maintaining low pressure drop characteristics essential for efficient air handling system operation. The robust construction ensures reliable long-term operation under continuous duty cycles. These versatile heating solutions deliver rapid heat-up capabilities, uniform airflow distribution, and high energy efficiency, making them ideally suited for HVAC systems, cleanrooms, paint booths, industrial drying processes, pharmaceutical air treatment, food processing ventilation, and specialized air handling applications. The advanced design incorporates safety features including over-temperature protection, airflow interlocks, and thermal cutouts to ensure safe operation and prevent element burnout in varying airflow conditions. Advanced engineering features include precision-manufactured galvanized steel or stainless-steel mounting frames with flanged or slide-in rail configurations for easy installation and maintenance. Weather-resistant terminal enclosures with IP65/67 ratings provide reliable electrical connections and environmental protection. Optional finned configurations mechanically bonded to tubular elements significantly boost convective performance for applications requiring enhanced heat transfer coefficients. High-temperature ceramic fiber insulation and specialized gasketing prevent heat loss and air bypass, ensuring optimal thermal efficiency. As energy-efficient heating solutions for modern air treatment systems, Duct Heaters offer superior thermal performance through optimized heat transfer design and minimal pressure drop characteristics. The modular construction enables easy maintenance and element replacement while the corrosion-resistant materials ensure extended operational life in demanding environments. Optional hazardous area certifications including ATEX and CIMFR enable safe operation in classified locations, making these heaters essential for industries requiring reliable, efficient, and safe air heating in critical ventilation and process air applications.
Why It Performs

Key Features

  • Energy-efficient operation with optimized heat transfer design
  • Corrosion-resistant materials for harsh industrial environments
  • Modular design enabling easy maintenance and element replacement
  • Custom shapes and configurations for specific applications
  • Uniform temperature profiles across entire duct cross-section
  • Low pressure drop characteristics preserving airflow efficiency
  • Rapid thermal response for quick temperature adjustments
  • Advanced safety systems including airflow and temperature protection
  • Hazardous area certifications for classified location applications
  • Multiple element configurations optimizing heat transfer performance
  • Precision temperature control with integrated sensor options
  • Robust construction ensuring extended operational life
  • Easy installation with flanged or slip-in mounting options
  • Comprehensive control integration for automated operation
Build Quality

Construction

  1. 01

    Advanced Heating Elements

    Choice of open-coil NiCr elements, MgO-packed tubular elements, or finned-tubular configurations engineered for optimal heat transfer, rapid thermal response, and extended operational life.

  2. 02

    Precision Mounting Frame

    Robust galvanized steel or stainless-steel frame with flanged or slide-in rail configurations for secure duct installation, proper element support, and easy maintenance access.

  3. 03

    Weather-Resistant Terminal Housing

    IP65/67-rated, ATEX, or CIMFR certified electrical enclosure with ceramic terminal blocks and cable glands ensuring secure electrical connections and environmental protection.

  4. 04

    Enhanced Fin Assembly

    Optional galvanized steel or stainless-steel fins mechanically bonded to tubular elements for significantly improved convective heat transfer performance and thermal efficiency.

  5. 05

    Thermal Insulation System

    High-temperature ceramic fiber insulation and precision gasketing preventing heat loss, air bypass, and ensuring maximum thermal efficiency and operator safety.

  6. 06

    Integrated Control Interface

    Optional temperature sensors, control panels, and safety systems including airflow switches, over-temperature protection, and automated control interfaces for precise air heating management.

Technical Data

Specifications

Frame Material Options
Galvanized Steel, SS304/310/316/321 (application dependent)
Heating Element Materials
SS304/310/316/321, Incoloy, Titanium (custom options)
Element Configuration
Open Coil, Tubular, Finned Tubular (optimized designs)
Maximum Watt Density
Up to 40 W/in² (6.2 W/cm²)
Power Rating Range
Up to 2 MW (custom ratings available)
Voltage Options
Up to 600V AC/DC (customizable configurations)
Air Velocity Range
0.5–20 m/s recommended for optimal performance
Operating Temperature Range
–20°C to 650°C air temperature
Pressure Drop
Optimized low pressure drop design
Temperature Control Accuracy
±2°C with integrated sensors and controllers
Safety Features
Airflow interlocks, thermal cutouts, over-temp protection
Mounting Options
Flanged, slip-in, custom configurations available
Enclosure Rating
IP65/67 standard, hazardous area options available
Service Life
5 to 10+ years typical HVAC operation
Where It's Used

Applications

  • HVAC air handling units and climate control systems
  • Industrial drying ovens and curing tunnels
  • Paint booths and powder coating production lines
  • Food processing hot-air treatment systems
  • Pharmaceutical cleanroom air handling
  • Semiconductor manufacturing air treatment
  • Annealing and heat treatment chamber heating
  • Textile drying and fabric processing systems
  • Dehumidification and moisture control applications
  • Chemical processing ventilation heating
  • Laboratory and research facility air conditioning
  • Commercial building climate control systems
  • Industrial process air preheating
  • Cleanroom and sterile environment heating
Questions

Frequently Asked Questions

A Duct Heater is an electric heating element assembly designed to heat air as it flows through ductwork or air handling systems. It is commonly installed in HVAC systems, air treatment plants, and industrial ventilation units. As air passes through the duct, it flows over electric heating elements mounted on frames or flanges, heating the air directly before it moves downstream into the process area or occupied space.

Worldwide Supply

Available In

We manufacture the Duct Heater in India and export it to 20 countries. Choose yours for local supply details.

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