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HER Series

Horizontal Electric Unit Heater

When you need powerful heat without gas or venting, the Modine HER Horizontal Electric Unit Heater series is the ideal solution. Designed for commercial, industrial, and institutional environments, this all-electric heater provides consistent, efficient warmth using durable, maintenance-free elements. Featuring quiet operation, horizontal air discharge, and a wide capacity range, the HER series offers unmatched flexibility. Available in a variety of sizes and heating capacities for various applications, including warehouses, workshops, stairwells, and mechanical rooms, the Modine HER series ensures reliable comfort while also supporting cleaner and more sustainable heating goals.

Models

  • 8 Model Sizes: 3 kW (10,200 BTU) to 25 kW (85,300 BTU)
Where To Buy

Highlighted Features

modine horizontal electric unit heater, model HER, front view

Versatile, Space-Saving Design

The HER’s horizontal design and multiple mounting options make it ideal for warehouses, manufacturing areas, schools, and garages—providing powerful heat without sacrificing floor space.
modine horizontal electric unit heater, model HER, magnified detail view of the back of the unit, showing a detailed view of the fan, fan motor, and fav cage.

Quiet, Reliable Electric Heat

The HER delivers clean, even heat with minimal noise—perfect for spaces where air quality and comfort matter most. It’s available in a range of power outputs to fit virtually any application.
electric unit heater front detail image, model HER, featuring a zoomed in front view, silver and brushed stainless steel Modine logo decal, sleek gray powder coating finish, black directorial louvers, and electric heating element inside of unit

Durable, Low-Maintenance Construction

Built with a heavy-duty steel housing, corrosion-resistant finish, and easy-access terminal connections, the HER is designed for dependable operation and simplified maintenance in demanding environments.

Product Details & Specifications

Key Features
  • All-Electric Operation: No gas, no emissions. Ideal for electrified buildings and sustainability goals.
  • Multiple Power Configurations: Available in single- or three-phase options to fit most electrical systems.
  • High-Capacity Heating Elements: Delivers reliable warmth across a wide BTU range.
  • Compact Horizontal Design: Mounts easily near ceilings to save floor space.
  • Adjustable Louvers: Direct heat precisely where it’s needed for even comfort.
  • Quiet, Maintenance-Free Operation: No combustion, no venting, and minimal moving parts.
  • Durable 20 ga. Steel Construction: Built for long life in commercial and industrial environments.
  • Flexible Mounting: Ceiling or wall brackets allow for optimal airflow orientation.
  • Flexible Mounting: Ceiling or wall brackets provide optimal airflow direction.
  • Adjustable Deflector Blades: Modify the heat throw length and direct heated air either upwards or downwards.
  • Accessible Terminal and Junction Boxes: Simplify access to heating-element terminals, overheat control switch, power supply, and control connections.
  • Enclosed Motors: Safeguarded against thermal overload for enhanced reliability.
  • Balanced Fans: Both statically and dynamically balanced for stable operation.
  • Automatic Overheat Control: Interrupts power to the heating elements if overheating occurs, resetting once it’s safe.
  • Removable Fan and Motor Assemblies: Allow for maintenance without lowering the unit heater.
  • Hinged Bottom Access: Provides easy access to controls for convenience.
  • DEA in the USA: Proudly designed, engineered & assembled in America.
Options

8 Model Sizes:

  • HER 30 – 3 kW (10,200 BTU)
  • HER 50 – 5 kW (17,100 BTU)
  • HER 75 – 7.5 kW (25,600 BTU)
  • HER 100 – 10 kW (34,100 BTU)
  • HER 125 – 12.5 kW (42,700 BTU)
  • HER 150 – 15 kW (51,200 BTU)
  • HER 200 – 20 kW (68,200 BTU)
  • HER 250 – 25 kW (85,300 BTU)

Supply Voltage:

  • 208V/1Ph/60Hz
  • 240V/1Ph/60Hz
  • 208V/3Ph/60Hz
  • 240V/3Ph/60Hz
  • 480V/3Ph/60Hz
  • 600V/3Ph/60Hz

Factory-Installed Disconnect Switch

  • Three-pole disconnect switch with a rotary dial mounted within an exterior recess on the bottom control compartment access panel.

Factory-Installed Low-Voltage Transformer

  • 24V transformer mounted in the interior of the control panel compartment to permit connection to a low-voltage thermostat.

Factory-Installed Thermostat

  • Line-volt thermostat with adjustment dial and temperature sensing bulb located on the back side of the unit, with a temperature set point range of 40 to 100°F and rated at 25A @ 240V
Accessories
  • Vertical Air Deflector Blades
    • Truncone, Cone-Jet
    • One-Way Louver, Two-Way Louver
  • Low-voltage Control Kit
  • Vertical Deflector Blades
  • Wall Mounting Bracket
  • Summer/Winter Switch
  • Thermostat
  • Thermostat Guard
Warranty
Applications

The HER series is perfect for spaces where gas isn’t practical or available. Its clean, all-electric operation makes it ideal for:

  • Warehouses and loading docks
  • Mechanical rooms and utility areas
  • Workshops, garages, and maintenance bays
  • Entryways, hallways, and stairwells
  • Commercial or institutional facilities pursuing decarbonization goals

Application Tip: Recommended for use in buildings with low ceilings and few obstructions, the HER is typically placed around the perimeter of the building, allowing the air stream from each heater to “wipe” the wall and produce a blanket of warm air along the building’s outside walls, where heat loss is greatest.

Tech Documents

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