Markel HF Series Custom Built Electric Duct Heaters
Markel HF Series Open Coil Duct Heaters ship 4-5 weeks after order placement.
Warren custom built open coil electric duct heaters are manufactured to your order specifications. The standard lead time (time from order placement until shipment) for these heaters is 6 weeks. Expedited production cycles are available for an additional charge, so please contact us if quick shipment is required.
Markel HF Series Open Coil Duct Heaters Features:
• Galvanized steel control box with optional ½” insulation and hinged cover.
• Primary and secondary overtemperature protection.
• De-energizing definite purpose contactors.
• Differential pressure fan interlock.
• 24 Volt control transformer.
• Heaters over 48 Amps have fusing per the National Electric Code.
• Line terminal blocks.
• NEMA 1 control panel is standard, other NEMA ratings are available.
• Slip-in or flange mount.
• Integral or remote controls.
• ETL Listed for zero clearance to combustible surfaces.
• Meets National Electric Code requirements.
• High grade Nickel/Chromium resistance wire insulated from the element supports by ceramic bushings.
• Minimum duct size is 8" wide x 6" high.
• Maximum wattage is 20KW / square foot.
For pricing on a HF Series duct heater, please call or e-mail with the following information:
- Volts.
- Phase.
- Kilowatts.
- Width.
- Height.
- Internal duct insulation thickness.
- Control Volts.
- Stages.
- Airflow (Control panel is extended upstream and same height as duct).
› HR (Horizontal left to right).
› HL (Horizontal right to left).
› VU (Vertical up).
› D (Vertical down).
- Options
› A (Additional stage).
› B (“A” Alloy element wire).
› C (Disconnecting contactors).
› D (Pneumatic-electric switch).
› E (Circuit fusing for heaters under 48 Amps).
› F (Flanged construction).
› G (Door interlock disconnect switch).
› H1(SCR Control single phase heater).
› H3 (SCR Control three phase heater).
› I (NEMA 1 Dust tight control box).
› J (Electronic step controller).
