Open-Coil Air Heating Assemblies

Open-Coil Air Heating Assemblies

Open-coil air heating assemblies are designed for applications that benefit from rapid thermal response and direct exposure of the resistance wire to a moving air stream. The heating wire is supported on suitable insulators within a frame, allowing a compact heater arrangement with low thermal mass. These assemblies can be configured to match the duct or machine geometry and may be used where a fast change in outlet-air temperature is needed. Their performance and safety depend heavily on airflow rate, distribution, wire temperature, support spacing, and protection against contamination or contact. Open-coil heaters are not appropriate for every environment, particularly where combustible contamination, corrosive vapours, or uncontrolled airflow may be present. A properly engineered assembly may include fan interlocks, airflow monitoring, staged power control, guards, and independent over-temperature protection.