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MEW Series

Corrosion‐Resistant Washdown Electric Unit Heater

When the working environment pushes the limits, you deserve heat that can rise to the occasion. The Modine MEW Corrosion-Resistant Washdown Electric Unit Heater is engineered for wet, humid, and corrosive areas where standard heaters can’t survive. Designed with fully enclosed housing, sealed electrical connections, and a moisture-resistant coating, the MEW delivers dependable, long-lasting performance in facilities such as food processing plants, wastewater treatment centers, greenhouses, and car washes.

Models

  • 10 Model Sizes: 3 kW (10,250 BTU) to 39 kW (133,100 BTU)
Where To Buy

Highlighted Features

Corrosion-Resistant Construction

Designed with a heavy-duty 304 stainless steel housing and epoxy-coated heating elements, the MEW Washdown Unit Heater resists corrosion, humidity, and chemical exposure—ideal for washdown or high-moisture applications.

Watertight, Washdown-Rated Design

Engineered to meet NEMA 4X standards, this unit features fully gasketed electrical enclosures and watertight connections—ensuring safe, dependable operation during regular cleaning or washdown procedures.

Clean, Efficient Electric Heat

Powered by electricity, the MEW provides efficient, even heat without combustion or venting requirements—delivering safe comfort in environments where air quality and sanitation are critical.

Product Details & Specifications

Key Features

Corrosion-Resistant Construction

  • Wash-down-rated design built to withstand high-pressure cleaning and direct water spray
  • Stainless steel 16-gauge 304 cabinet and spiral-finned heating elements maximize operating life
  • NEMA Type 4X Protection guards against water penetration, enhancing longevity in corrosive or washdown settings.
  • For applications up to 70 PSI in non-hazardous areas
  • Permanently lubricated motor and epoxy-coated fan reduce maintenance and downtime
  • No combustion or venting. Ideal for sealed or humidity-controlled spaces
  • Totally enclosed motor prevents moisture and contaminants from entering critical components

Install- and service-friendly mounting and controls

  • Includes a stainless steel wall/ceiling mounting kit
  • Universal mounting bracket for wall or ceiling mounting for 3-20 kW models, and wall mounting only for 25-39 kW
  • 120v controls and field wiring connections

Industrial-Grade Performance

  • High-capacity performance available in a range of kilowatt ratings to meet industrial heating demands
  • Horizontal Air Discharge for even heat distribution for open floor plans or work zones
  • Customizable to your application with remote or built-in thermostat, disconnect switch, 3-way fan switch, built-in pilot light, and manual-reset high-temp limit

Integrated Safety Features

  • Reliable overheat protection with automatic-reset high-limit controls
  • US Coast Guard Marine Classification available with the following selected options: a built-in manual reset, a high-temperature limit (M), and a built-in disconnect switch (D)
Options

10 Model Sizes:

  • MEW30 – 3 kW (10,250 BTU)
  • MEW50 – 5 kW (17,050 BTU)
  • MEW75 – 7.5 kW (25,600 BTU)
  • MEW100 – 10 kW (34,100 BTU)
  • MEW150 – 15 kW (51,200 BTU)
  • MEW200 – 20 kW (68,250 BTU)
  • MEW250 – 25 kW (85,300 BTU)
  • MEW300 – 30 kW (102,350 BTU)
  • MEW350 – 35 kW (119,450 BTU)
  • MEW390 – 39 kW (133,100 BTU)
Supply Voltage:
  • 208V/1Ph/60Hz
  • 240V/1Ph/60Hz
  • 208V/3Ph/60Hz
  • 240V/3Ph/60Hz
  • 480V/3Ph/60Hz
  • 600V/3Ph/60Hz
Additional Options:
  • Thermally protected 1⁄2 HP Motor with permanently lubricated ball bearings.
  • Optional built-in NEMA Type 4X thermostat.
  • Cabinet material is type 304 stainless-steel, 16-gauge (0.06” / 1.52 mm).
  • Upgrade all external fasteners to stainless steel
  • Factory-installed thermostat (built-in or remote)
  • Factory-installed pilot light
  • Factory-installed 3-position fan switch
  • Factory-installed door interlock disconnect
  • Factory-installed manual reset temperature high-limit. Includes factory-installed door interlocking disconnect switch to meet CE and U.S Coast Guard Marine Duty requirements. This option replaces the automatic reset temperature high-limit

US Coast Guard Marine Rating is available only with the following options selected:

  • Built-in manual reset
  • High-temperature limit (M)
  • Built-in disconnect switch (D)
Accessories
  • Wall Mounting Bracket
  • Summer/Winter Switch
  • Thermostat
  • Thermostat Guard
Warranty
Applications

The MEW is designed for spaces where moisture, chemical vapors, or wash-down procedures make other heaters fail. Common applications include:

  • Food and beverage processing plants
  • Wastewater treatment facilities
  • Car washes and detailing bays
  • Agricultural and greenhouse operations
  • Marine environments and coastal facilities
  • Industrial areas requiring regular sanitation

Tech Documents

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