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MasterCool MMBT12 Portable Swamp Cooler

MasterCool MMBT12 2-Speed Portable Swamp Cooler

Model: MMBT12 | SKU: ma3739
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Price: $639.95
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  • FREE Standard Shipping
  • In Stock - Usually ships in 3 to 5 days.

Additional Warranty Options Available
3-Year Appliance Warranty (Date-of-Purchase) ($49.95) Details
5-Year Appliance Warranty (Date-of-Purchase) ($99.95) Details
  • Product Overview

    The MasterCool MMBT12 Portable Swamp Cooler cools areas up to 600 square feet at 1,145 cubic feet per minute (CFM). Durable and superbly engineered, this model is ideal for use in workshops, patios, garages, and decks.  Plus, it features a convenient direct hose hookup, a 2-speed fan, and 4-way directional louvers to maximize performance.  

    Natural Cooling

    Unlike refrigerant air conditioners, which cool using a refrigerant gas system, the MasterCool MMBT12 uses the natural process of water evaporation. First, hot air is drawn into the evaporative cooler through the unit vents and passed through a damp evaporative cooling pad. When the moving air is brought into contact with the water-saturated pad, evaporation occurs as the heat from the hot air causes water molecules to transform into a gas. The evaporative cooling pad absorbs the heat out of the air while a powerful fan disperses fresh, cool air throughout your space.

    Versatile and Portable

    This portable swamp cooler rolls on casters for easy transport. It works both indoors and outdoors and even functions as a fan by adjusting a simple control. In fan mode, it has a high setting and a low setting. It also has a 2-speed fan with a 4-way directional air grille, giving you more control over airflow direction for wider coverage. Quiet operation means you can use it in your yard or workplace without worrying about excessive noise. 

    Additional Features

    • Fan-Only Mode—Operate the MMBT12 without the pump when only a fan is desired.
    • Use Hose or Water Reservoir—Choose between filling the 8-gallon water tank or simply attaching your cooler to a water hose for continuous filling.
    • Uses No Chemicals—This evaporative cooler doesn’t use any of the chemicals found in AC units, such as Freon, making it more eco-friendly.
    • Uses 75% Less Energy Than an AC—Because it uses much less energy than a typical air conditioning unit, you’ll see lower energy costs
    • Supplies Natural, Fresh Air—Provides a steady breeze of cooled outdoor air.  


    The MasterCool MMBT12 is a 2-speed indoor/outdoor cooler that's ideal for cooling areas up to 600 square feet.

    What Customers Love

    • Budget- and Eco-Friendly - This unit uses minimal electricity to cool your space, so it's easier on the environment and your power bill.

    Things to Consider

    • Works Best in the Right Conditions—This model works best in low-humidity climates. Additionally, indoor use requires ready access to outdoor air via an open door or window.

    Manufacturer's Warranty

    2-Year-Limited Warranty

    Manufacturer's Literature

    MasterCool MMBT12 Owner's Manual
    User's Guide for the MMBT12 Swamp Cooler

    What's In The Box?

    • MasterCool MMBT12 Swamp Cooler
    • Owner's Manual

    View All Swamp Coolers »
  • Specifications

    Evaporative Cooler TypeResidential
    Coverage Area600 sq. ft.
    Recommended UseIndoor and Outdoor
    Height37.38 in.
    Width32.63 in.
    Depth22.13 in.
    Weight96 lbs.
    Number of Fan Speeds2
    Cubic Feet Per Minute (Max CFM)1145 CFM
    Water Reservoir Capacity8 gallons
    Water Level IndicatorNo
    Hose HookupYes
    Remote ControlNo
    Programmable TimerNo
    Adjustable LouversNo
    Oscillating LouversNo
    Germ ProtectionNo
    Voltage110-120 V
    Maximum Amperage8.1 Amps
    Power Cord Length8 ft.
    Automatic Overheat ProtectionNo
    Safety CertificationsUL
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