Flat Wire Zig-Zag Heaters

Designed for Long Life and Quick Response Times

Flat wire (zig-zag) air heaters are compact, high-watt-density heating elements ideal for efficient air heating in appliances, commercial kitchens, and space heating systems. They use stitched flat wire on mica boards to deliver fast, reliable heat with low pressure loss and can be configured as standard or fully custom designs for specific OEM applications.

Flat-Wire Air Heaters Explained

Flat wire, sometimes called zig-zag or stitch-bent heating elements, are wire heating elements formed into a flat zig-zag pattern and mounted on an insulating support such as mica. This construction concentrates surface area and watt density in a compact, lightweight package, making them well suited for forced-air and convection-style air heating applications.

Construction and Design Features

• High watt density for fast, efficient air heating in compact spaces.
• Robust flat wire and mica construction for long service life.
• Low airflow pressure drop with excellent heat transfer.
• Available in standard sizes or fully custom OEM designs.
• Optional metal housing for easy integration with fans and blowers.
• Some designs allow instant fan shutoff with no cool-down cycle.

A typical flat wire heater assembly includes mica boards, stitch-bent flat wire elements, a mica support structure, and power leads or terminals. Depending on the design, the heater can also be integrated into a metal housing to simplify mounting in ductwork, air curtains, blowers, or fan assemblies.

Because the wire is exposed to the airflow, air passes easily over the flat wire geometry, which promotes maximum heat transfer to the air stream with relatively low pressure drop. In some properly engineered designs, the thermal mass and layout are optimized so that no extended cool-down cycle is required, allowing the fan to be shut off immediately without damaging the element.

Performance and Application Advantages

Flat wire heaters are commonly used anywhere moving air needs to be heated quickly and efficiently, including small and large appliances, residential and commercial kitchen equipment, and various space or enclosure heating systems. Their higher achievable watt density compared with many coiled-wire air heaters allows more power in a smaller volume, providing faster response and more compact system designs.

Standard configurations exist for many airflow and power requirements, but these elements are also frequently customized for OEMs to match specific voltages, wattages, dimensions, mounting methods, and airflow paths. This flexibility lets engineering teams choose a proven catalog design or collaborate on a fully tailored heater that integrates cleanly into a new product platform.

Let's Work Together

Eichenauer designs and supplies wire air heaters for a range of fan, blower, and duct-style heating applications and can assist with both standard and custom solutions. The Newport, NH team can be contacted via phone at 603-863-1454 or via our contact us page to discuss air heater requirements, operating conditions, and integration details.