HESSAIRE MC18M Portable Outdoor Swamp Cooler – Up to 500 sq. ft.

This swamp cooler offers an energy-efficient cooling solution for various settings. Its durable construction and portability make it perfect for outdoor use, while its quiet operation ensures comfort without disruption. The option to use it with portable power sources adds flexibility for remote locations or outdoor events.

Key Features:

  • 1,300 CFM airflow
  • 5 settings: 2-speeds for fan-only operation, 2 speeds for fan plus pump / evaporation, or pump / evaporation only
  • 4.8-gallon water tank
  • 53.4 dB noise level (quieter than normal conversation)
  • Designed for outdoor use, more durable than indoor models
  • Cooling range up to 15 feet
  • Covers up to 500 square feet in partially enclosed areas


  • 3-4 hours of evaporative cooling on a full tank; turn off pump switch when tank is empty
  • Continuous operation possible with garden hose connection
  • 85 watts power consumption

Portability and Convenience:

  • Simple set up: push to install wheels, add water to tank manually or install hose adapter.
  • Weight: 16 lbs (without water)
  • Dimensions: 48″D x 48″W x 48″H
  • Carrying handle and caster wheels for easy movement
  • Freestanding design


  • Suitable for outdoor and indoor use (ensure proper ventilation indoors)
  • Ideal for patios, workshops, garages, and more
  • Can be powered by a portable power station, 12-volt car charger (adapter needed), or household electrical outlet

Maintenance Tips:

  • Use fan only mode when the water tank is empty
  • Easily replaceable media pads (Xel50 19″ x 17″)
  • Be sure electrical wires and connections stay dry at all times

Additional Information:

  • Color: White and gray
  • 1-year warranty on parts




You can find more products and accessories at the Hessaire store at Amazon.


  • Most effective in climates under 60% humidity
    Find your average humidity levels at TimeAndDate.com by entering your nearest city
  • Most effective in partially enclosed areas
  • Combine this with any shade
  • For areas up to 950 sq. ft. – Hessaire MC37M
  • For areas up to 1600 sq. ft. – Hessaire MC61M

Additional information


most effective in climates under 60% humidity.


has its own 4.8 gallon water tank. Can also use garden hose connection.


Power by household current (100-240 volt 50/60 Hz outlet).
Can also be powered by 12-volt car charger (adapter needed) or portable power station

cools this size area

5’ x 5’ x 5’ (1.5m x 1.5m x 1.5m); 500 cubic feet (42-56 cubic meters).
Cooling breeze can reach 15 feet or more.


1300 CFM