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Open Coil Heaters
Electric Open Coil Heater
OEM Open Coil Heater Manufacturer
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Open Coil Heating Elements
OEM Open Coil Heater

Open Coil Heater

Wattheat manufactures custom open coil heaters for industrial air heating, HVAC systems, drying equipment, air curtains, and OEM heating applications. Designed with high-quality resistance wire and durable ceramic insulators, our open coil heating elements provide fast heat transfer, uniform airflow heating, and long service life. We offer complete customization for voltage, power, coil configuration, frame design, and mounting methods to meet various industrial heating requirements.

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Open Coil Heaters
Electric Open Coil Heater
OEM Open Coil Heater Manufacturer
Open Coil Air Heater
Open Coil Heating Elements
OEM Open Coil Heater

Open Coil Heater

Wattheat manufactures custom open coil heaters for industrial air heating, HVAC systems, drying equipment, air curtains, and OEM heating applications. Designed with high-quality resistance wire and durable ceramic insulators, our open coil heating elements provide fast heat transfer, uniform airflow heating, and long service life. We offer complete customization for voltage, power, coil configuration, frame design, and mounting methods to meet various industrial heating requirements.

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What Is an Open Coil Heater?

An open coil heater is an electric heating element that generates heat through exposed resistance wire supported by ceramic insulators or metal frames. Because the heating wire is directly exposed to airflow, open coil heaters provide rapid heat transfer, high thermal efficiency, and low thermal mass. They are widely used in HVAC equipment, industrial ovens, air handling units, drying systems, air curtains, and process air heating applications.

Industrial Open Coil Heater

Key Features of Open Coil Heaters

  • Fast heating response
  • High heat transfer efficiency
  • Excellent airflow heating
  • Low thermal mass
  • Uniform temperature distribution
  • Compact and lightweight construction
  • Long operating life
  • Easy replacement and maintenance
  • Custom frame and coil configurations
  • Suitable for continuous industrial operation

Typical Applications of Open Coil Heaters

IndustryTypical Applications
HVACAir Handling Units (AHU)
HVACDuct Heaters
Commercial BuildingsAir Curtains
IndustrialDrying Equipment
IndustrialIndustrial Ovens
ManufacturingHeat Treatment Systems
TextileDrying Machines
Food ProcessingAir Heating Systems
PackagingShrink Packaging Equipment
CleanroomAir Circulation Systems

Open Coil Heater Specifications

ArameterOptions
Voltage12V – 480V
PowerCustomizable based on application requirements
Heating WireNickel-Chromium (NiCr) / Iron-Chromium-Aluminum (FeCrAl)
Frame MaterialStainless Steel / Galvanized Steel
InsulatorHigh-temperature Ceramic
Coil DiameterFully Custom
Coil PitchFully Custom
Operating TemperatureDesigned to meet specific process requirements
MountingCustomized to fit existing hardware

Custom Open Coil Heater Solutions

Every industrial heating system has unique airflow, temperature, and installation requirements. Wattheat provides complete OEM customization, including:

  • Voltage & Wattage: Scalable to your system’s electrical load.

  • Heating Wire Material: Optimized for your specific temperature range.

  • Coil Geometry & Ceramic Layout: Engineered for ideal heat distribution.

  • Frame Dimensions & Mounting: Precision-matched to your CAD drawings or samples.

  • Terminals & Leads: Configured for your specific assembly environment.

  • Protective Guards: Added safety features for complex installations.

We manufacture open coil heaters according to your drawings, samples, or technical specifications.

Open Coil Heater Construction

A typical open coil heater consists of:

  • Resistance heating wire: High-efficiency NiCr or FeCrAl alloys.

  • Ceramic insulators: High-dielectric strength support components.

  • Support frame: Corrosion-resistant structural metalwork.

  • Electrical terminals: Secure points for power distribution.

  • Mounting brackets: Engineered for stable installation.

The exposed heating wire allows direct heat transfer to moving air, making open coil heaters highly efficient for forced-air heating systems.

Why Choose Wattheat

Since 2009, Wattheat has established itself as a trusted partner for global OEM manufacturers, providing precision-engineered heating solutions that bridge the gap between design concepts and industrial reality. We don’t just supply heaters; we provide end-to-end thermal management support.

  • Custom Engineering & Prototyping: We provide expert technical consultation and rapid prototypes to accelerate your time-to-market.

  • Flexible & Scalable Production: Our production lines handle everything from low-volume trials to large-scale industrial orders to meet your supply chain needs.

  • Uncompromising Quality Control: We utilize strict inspection protocols and international standards to ensure reliable performance in demanding environments.

  • Proven Global Supply Chain: With extensive export experience, we provide seamless logistics and reliable delivery to keep your production on track.

Part of the Industrial Heating Family

Open coil heaters are part of Wattheat’s industrial heating solutions for process heating and air heating applications. Explore our related product lines:

Wattheat Product Catalog Band Heaters

Band Heaters

Barrels, nozzles, pipes, extrusion equipment

Wattheat Products - Cartridge Heater

Cartridge Heaters

 Molds, dies, platens, hot plates

Wattheat Product Catalog-Strip Heaters

Strip Heaters

 Flat surfaces, machinery heating

Wattheat Product Catalog-Flat Heaters

Flat Heaters

Surface heating and thermal control

Wattheat Product Catalog-Finned Heaters

Finned Heaters

Air heating systems & forced-air applications

Wattheat Product Catalog-Immersion Heaters

Immersion Heaters

 Tanks, liquids, process heating

Wattheat Product Catalog-Hot Runner Heaters

Hot Runner Heater

Injection molding , manifolds, nozzles

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Frequently Asked Questions (FAQ)

OEM Open Coil Heater Manufacturer

They are widely used in:

  • Air handling units
  • Duct heaters
  • Air curtains
  • Drying systems
  • Industrial ovens
  • Process air heating

Yes. Wattheat provides custom voltage, wattage, frame dimensions, coil geometry, terminals, and mounting configurations according to OEM requirements.

Common options include:

  • Nickel-Chromium (NiCr)
  • Iron-Chromium-Aluminum (FeCrAl)

Material selection depends on operating temperature and application.

Yes. Properly designed open coil heaters are suitable for continuous industrial operation with appropriate airflow and temperature control.

Selection depends on:

  • Supply voltage
  • Required power
  • Airflow rate
  • Operating temperature
  • Installation space
  • Mounting method

Our engineering team can recommend the most suitable configuration based on your application.

Yes, we specialize in OEM replacements. If you provide the technical specifications or a sample of the existing heater, we can manufacture an equivalent unit that fits your current hardware seamlessly.

OEM Open Coil Heater Manufacturer

Contact Us

We will contact you within 1 working day, please pay attention to the email with the suffix “@wattheat.com”.

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We will contact you within 1 working day, please pay attention to the email with the suffix “@wattheat.com”.

Victor LEE - Wattheat of Founder