Dualcoil

Dualcoil is a term used to describe a heating element arrangement consisting of two individual coils designed to heat a single load. In many contexts, notably in vaping devices, dual coils are mounted in close proximity on a deck and wired to a power source in either series or parallel configurations. In series, the two coils share the supply voltage, resulting in a higher total resistance and typically slower ramp with lower current. In parallel, the effective resistance is reduced, increasing current for faster heat-up but placing higher demand on the power source and battery.

The dualcoil setup is often chosen to increase the available heating surface area, which can enhance vapor production and flavor retention. It can also promote more even heat distribution across the wick when properly aligned with airflow. However, it introduces greater mechanical and electrical complexity. Potential drawbacks include higher mass and space requirements, possible uneven heating or hot spots if one coil performs differently from the other, and increased battery drain due to the lower overall resistance when wired in parallel.

Design considerations for dualcoil systems include wire material (such as Kanthal, stainless steel, or nickel-chromium), gauge (commonly in the 26–34 AWG range for vaping), and coil geometry. Proper spacing, insulation from the deck, and appropriate airflow are important to achieve consistent performance. Regular maintenance, including cleaning and replacing coils and wicks, helps maintain flavor and safety.

See also: coil, vaping, Ohm's law.