Modine HER30C-SP Horizontal Electric Unit Heater, 3kW, 240V Single Phase

10,200 BTU Commercial Electric Heater | 380 CFM, 12-Ft Throw, Adjustable Louvers

The Modine HER30C-SP is a 3kW horizontal electric unit heater built for commercial and industrial spaces with low ceilings. It delivers 10,200 BTU at 380 CFM with a 12-foot heat throw and mounts at a maximum height of 8 feet. The HER series is designed to hang along building perimeters so the air stream "wipes" the wall, creating a warm-air blanket across outside surfaces where heat loss is greatest.

It runs on a 240V single-phase circuit and needs no gas line or vent pipe. Adjustable horizontal louvers direct airflow up or down, and optional vertical deflector blades add left-right control.

Quick Specs

• kW Rating: 3

• BTU Output: 10,200

• Voltage: 240V, 1-Phase, 60 Hz

• Airflow: 380 CFM (inlet)

• Temperature Rise: 25°F

• Heat Throw: 12 ft

• Max Mounting Height: 8 ft

• Dimensions (W x H x D): 14.25 x 17.5 x 17.25 in

• Weight: 34 lbs

Key Features

• Horizontal delivery with adjustable louvers: Standard horizontal air deflector blades adjust up or down. Optional vertical deflector blades provide left-right control. This gives full directional coverage from a single unit, ideal for perimeter placement in warehouses and workshops.

• Zero combustion, no venting required: All-electric operation means no gas connection, no exhaust pipe, and no emissions at the point of use. Safe for enclosed spaces, including greenhouses, food storage areas, and clean rooms.

• Compact footprint for low-ceiling buildings: At 14.25 x 17.5 x 17.25 inches and 34 lbs, the HER30 is one of the smallest commercial electric unit heaters available. Minimum bottom clearance is 6 ft (USA) or 8 ft (Canada), making it practical for garages, maintenance rooms, and mezzanine areas.

• Hinged bottom panel for service access: The control compartment opens from below without lowering the unit. Terminal blocks, contactors, and wiring are all accessible from a single panel. The fan and motor assembly can also be removed without taking the heater down.

• Auto-reset overheat protection: A capillary-tube overheat control interrupts power to the heating elements if the temperature exceeds safe limits. The fan continues running to cool the unit, and the control resets automatically once the temperature drops.

• Corrosion-resistant steel construction: 20-gauge steel casing is cleaned, phosphatized, and coated with baked-on polyester powdercoat paint. Suitable for humid environments like greenhouses.

Modine HER30C-SP Specifications

Also Available in Other Voltages

All voltage variants share the same physical dimensions, BTU output, airflow, and heat throw. The single-phase models (208V and 240V) are the most common for light commercial and residential applications.

Applications

The Modine HER30 horizontal electric unit heater is a compact electric alternative to gas unit heaters, built for buildings where ceiling height is limited, and gas service is unavailable or unwanted. Its horizontal air delivery and adjustable louvers make it effective along perimeter walls in warehouses, workshops, garages, greenhouses, maintenance rooms, and storage facilities. Multiple units can be arranged so that each supports the next unit's airstream, creating a circulatory air movement across the space.

At 3kW (10,200 BTU), this is the entry-level model in the HER series. It suits smaller zones, spot-heating applications, and supplemental heating in areas remote from the main system where extending gas or hot water lines would be too costly.

Available Accessories

• Wall Mounting Bracket: One-point suspension bracket for wall installation. Allows 90-degree horizontal swivel for optimal air direction. For HER50 through HER250 (HER30 uses ceiling suspension or pipe hanger kit).

• Pipe Hanger Adapter Kit: Two drilled 3/4" IPS pipe caps and two capscrews for threaded-pipe ceiling suspension. One kit per unit.

• Unit-Mounted Thermostat: Field-installed thermostat kit with 40°F to 90°F range. Mounts directly on the HER unit.

• Low-Voltage Control Kit: Allows connection of a low-voltage thermostat. Cannot be combined with the unit-mounted thermostat.

• Summer/Winter Switch: Winter mode cycles fan and elements together. Summer mode runs the fan continuously for air circulation while the thermostat controls elements only.

• Vertical Deflector Blades: Add left-right airflow control in addition to the standard up-down horizontal louvers.

Warranty

The Modine HER30C-SP horizontal electric unit heater carries a 2-year parts warranty covering defects in material and workmanship. Sheet metal components are covered for 1 year. Full warranty terms are available from Modine Manufacturing Company (Racine, WI). The warranty applies to the original owner-user and does not cover labor.

Buy the Modine HER30C-SP Horizontal Electric Unit Heater Online from Cleanflow

Cleanflow Utility Supply Company is an authorized Modine distributor serving customers across Canada and the United States. All orders ship free with a 30-day return policy. Whether you need a single 3kW horizontal electric unit heater for a workshop or multiple units for a warehouse perimeter, Cleanflow stocks the full HER series and ships direct.

Need a larger model or a different heater type? Browse our complete selection of heaters, including the Amp Dawg electric series and gas-fired Hot Dawg and PTP models.

Frequently Asked Questions

What size space can the HER30 heat?

At 10,200 BTU, the HER30 horizontal electric unit heater can heat approximately 250 to 350 sq ft in a well-insulated space with standard ceiling height. Actual coverage depends on insulation, ceiling height, climate zone, and desired temperature rise. Use a BTU calculator to determine your exact requirement.

Does this heater require venting or a gas connection?

No. The HER30 heater is 100% electric. No vent pipe, no gas line, no combustion exhaust. It connects to a 240V single-phase circuit and is ready to operate.

Can I mount this on a wall?

The HER30 horizontal electric unit heater comes with two tapped ceiling suspension holes. A pipe hanger adapter kit is available for threaded-pipe suspension. Note that the wall mounting bracket accessory is available for HER50 and larger models. For the HER30, ceiling suspension is the standard method.

What is the difference between HER and Amp Dawg electric heaters?

The HER series is commercial/industrial grade with adjustable louvers, multi-voltage options (including 480V three-phase), and 20-gauge steel construction. The Amp Dawg is a residential-focused unit with a cool-touch casing, dual heat stages, and a 10-year heat exchanger warranty. The HER30 delivers 10,200 BTU at 3kW; the smallest Amp Dawg (AMP057A) delivers 19,437 BTU at 5.7kW.

Is this heater suitable for a greenhouse?

Yes. The baked-on polyester powder-coat finish resists corrosion in humid environments. Multiple HER units can be placed around the greenhouse perimeter to create even heat distribution.

What electrical circuit does the HER30 need?

A dedicated 240V, single-phase, 60 Hz circuit. The power supply must be within 5% of the rated voltage. A fused or circuit breaker disconnect switch is required. Consult a licensed electrician for your specific installation.