Duct & HVAC / Auxiliary Air Heaters: Precision Airflow Thermal Control
Duct & HVAC / Auxiliary Air Heaters: Precision Airflow Thermal Control
| Technical Specs | Range / Typical Values |
| Voltage | 208V – 600V (3-Phase common) |
| Safety | Manual & Automatic reset limit switches |
| Airflow | Optimized for low pressure-drop |
High-Efficiency Airflow Design: Engineered with minimal static pressure drop, allowing your ventilation systems to maintain optimal flow rates while maximizing heat exchange.
Finned for Performance: Our auxiliary heaters often feature stainless steel or aluminized steel fins brazed to tubular elements. This increases the surface area, allowing for lower sheath temperatures and longer element life.
Modular “Slide-Out” Construction: Designed for easy installation and maintenance, many models feature a “drawer” design that allows the heating bundle to be removed without dismantling the entire ductwork.
Safety First: Every unit is equipped with primary and secondary thermal cutouts (manual and automatic reset) to prevent overheating in the event of airflow failure.
| Feature | Open Coil Duct Heaters | Finned Tubular (Auxiliary) |
| Airflow Speed | Low to Medium | Medium to High Velocity |
| Max Outlet Temp | Up to 1000°F (538°C) | Up to 800°F (427°C) |
| Corrosion Resistance | Moderate (Dry air only) | High (Moist or outdoor air) |
| Voltage Range | 120V to 600V (Single/3-Phase) | 120V to 600V (Single/3-Phase) |
Commercial HVAC: Reheat for VAV (Variable Air Volume) boxes, supplemental heating for heat pump systems, and multi-zone climate control.
Industrial Drying: Dehydration of food products, curing of coatings, and moisture removal in pharmaceutical processing.
Auxiliary Cabin Heating: Supplemental heating for specialized vehicles, crane cabs, or remote telecommunication shelters.
Load Banks: Dissipating electrical energy in backup power testing systems.
For critical industrial processes, a heating element is only as good as its durability and control. At Runkel, we specialize in high-spec thermal engineering. From high-vacuum environments to hazardous explosion-proof zones, we provide fully customized heaters integrated with bespoke Control Cabinets for a true “plug-and-play” experience.
The Total Solution: Integrated Control Cabinets. We don’t just provide the heat; we provide the brain. To ensure your heating system operates safely and accurately, we offer Custom-Built Control Cabinets tailored to your specific heater:Precise Control: PID or PLC-based systems for temperature accuracy within $\pm 1$°C.Safety First: Integrated over-temperature protection, leakage circuit breakers, and emergency stops.User Interface: Digital displays, HMI touchscreens, or remote monitoring capabilities.Custom Voltage: Built to match your local industrial power standards (e.g., 220V, 380V, 440V, or 480V).
“Complex Requirements, Simple Execution.”
Direct Replacement of Legacy Parts:
If your imported equipment has a failed flanged heater or a specialized vacuum element that is too expensive or slow to source from the OEM, we can reverse-engineer and manufacture a replacement that meets or exceeds the original specs.
Material Excellence:
We select materials based on your environment—whether it’s Incoloy 800 for high-temperature oxidation or Pure PTFE for chemical longevity.
Start Your Custom Build Today
Whether you need a replacement Defrost Heater for a cold storage unit or a complete Explosion-Proof Circulation System with a control panel, we are ready to assist.