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Internet # 100662181

Model # ASA51

Store SKU # 356002

5000 CFM Side-Draft Wall/Roof 8 in. Media Evaporative Cooler for 1650 sq. ft. (Motor Not Included)

$956.00
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  • Designed to work in dry/arid climates
  • Is not an air conditioner
  • High quality components at low costs
  • View More Details

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Product Details

About This Product

This MasterCool down-discharge evaporative cooler is provide an economical, environmentally-friendly means of cooling up to 1,650 sq. ft. Engineered for maximum airflow and superior durability, the MasterCool line of coolers not only save energy dollars, but provides years of worry-free cooling comfort for you and your family. This unit can accommodate a 1/3, 1/2 or 3/4 HP motor (sold separately) based on your cooling needs. This evaporative cooler performs best in dry, arid climates.

Highlights

Product Information

Internet # 100662181

Model # ASA51

Store SKU # 356002

Specifications

Dimensions: H 28 in, W 42 in, D 45 in

Dimensions

Product Depth (in.)

45 in

Product Height (in.)

28 in

Product Width (in.)

42 in

Details

Air Volume (CFM)

5000

Color Family

Cream

Color/Finish

Cool Sand

Commercial / Residential

Commercial / Residential

Cooling Area (Sq. Ft.)

1650

Discharge Direction

Side Draft

Evaporative Cooler Features

No additional features

Evaporative Cooler Pad Material

Cellulose

Evaporative Cooler Product Type

Whole House Evaporative Cooler

Included

No additional components or accessories are included

Indoor/Outdoor

Outdoor

Inlet - Single/Duel/Ducted

Single Inlet

Material

Galvanized Steel

Maximum compatible motor horsepower (hp)

.75

Motor Included

No

Mount Location

Floor Mount, Roof Mount, Wall Mount

Pack Size

1

Product Weight (lb.)

163 lb

Returnable

90-Day

Single or dual inlet

Single inlet

Water Tank Capacity (Gallons)

8

Warranty / Certifications

Certifications and Listings

UL Classified

Manufacturer Warranty

1-yr limited warranty on cabinet against leakage due to rust out/limited lifetime warranty on water reservoir/5-yr limited warranty on media/1-yr limited warranty on parts

Questions & Answers

is the media included ASA 51 evaporative cooler
ByAug 8, 2026
1 Answer | 
Answer This Question

Hello! Yes, the pad media does come with the cooler. If you have any other questions or concerns, please email us at info@essickair.com. -Melissa, Mastercool

By|Aug 10, 2026


    What is the outlet duct size
    ByJan 12, 2026
    1 Answer | 
    Answer This Question

    Hello, RonMc! The duct opening on this cooler is 19-3/4 inches square. If you have any other questions about our product, please email us at info@essickair.com. -Melissa, Champion Cooler

    By|Jan 12, 2026


      Does this unit come with the mounting bracket for the motor?
      ByMay 8, 2025
      1 Answer | 
      Answer This Question

      Hello! Yes, this unit comes with the motor mount brackets. -Melissa, Mastercool

      By|May 8, 2025


        Why does the 800-643-8341 number not get answered if it is posted here as an answer?
        ByJan 16, 2025
        1 Answer | 
        Answer This Question

        Hello! Our office was closed Monday in observance of the Holiday. Our office is now open. You may reach us from 8 to 5, Central Standard time, Monday through Friday at 1-800-643-8341. -Melissa, Champion Cooler

        By|Jan 21, 2025


          How often do you have to change cooling pad/panel?
          ByMay 14, 2024
          1 Answer | 
          Answer This Question

          Hello, Raymond! We recommend changing your pad media every season during spring start up or during winter shut down. If you have any other questions about our products, please email us at info@essickair.com. -Melissa, Champion Cooler

          By|May 14, 2024


            I have two Adobe air units model# Mrc55wb .What Master Cool units would replace them? Thank you
            ByMar 5, 2024
            0 Answer | 
            Answer This Question

            Can I use the 12 media on this 5000 mastercool?
            ByAug 1, 2023
            1 Answer | 
            Answer This Question

            Hello, Chapis! This cooler cannot use 12-inch media, but model number ASA5112 is a 12-inch media unit. If you have any other questions about our product, please email info@essickair.com. -Melissa, Champion Cooler

            By|Aug 3, 2023


              how much does unit weigh
              ByMay 8, 2023
              1 Answer | 
              Answer This Question

              Hello! The shipping weight for the ADA51 is 163 lbs., and the operating weight is 227 lbs. If you have any other questions regarding this unit, please email us at info@essickair.com.

              By|May 9, 2023


                Viewing 1-8 of 17

                Customer Reviews

                4.4 out of 5

                • 4.4 out of 36 reviews
                • 89% recommend this product
                Filter by:
                Showing 1-10 of 36 reviews
                Thank God I don't have to go atop roof every spring & fall multiple times.
                Replaced roof top swamp cooler with this unit off kitchen. Used remote control at top of stairs by loft with 4 wire control of unit with shorter run to power. got significant rebate because of purge & remote sensing. Installed April 2014, replacing pads this week for first time, probably should have done before. $82 for new pad set at Home Depot with veterans discount. Air flow through house is great!
                by
                Response from EssickAirProductsApr 23, 2025
                Hello, Dr. Bob! Thank you so much for giving us your feedback. We appreciate it! -Melissa, Mastercool
                  • Recommended
                  Unit was damaged in shipment.....large dent in the rear right hand side. Unfortunately due to extreme heat (114 F) it had to be installed anyway!
                  by
                  Response from EssickAirProductsJun 27, 2024
                  Hello! Thanks for taking the time to post your review. We are sorry to hear you had an issue with your cooler purchase. If you’d like some help with this, please email us at info@essickair.com, or give us a call at 1-800-643-8341, 7:30 a.m. – 6:00 p.m. CST, Monday through Friday. Thanks! -Melissa, Champion Cooler
                  • Verified Purchase
                  The worst manufacturer item made in America I’ve ever bought quality is poor if I had a truck I’d return it
                  by
                  Response from EssickAirProductsJun 27, 2024
                  HomeDepotCustomer - Thank you for taking the time to share your feedback on our product. We greatly value customer reviews, as they are crucial for our continuous improvement efforts. Our goal is to provide high-quality, affordable products, and I regret to hear that we did not meet your expectations this time. I would appreciate the opportunity to understand your experience better. Could you please contact me directly at twilson@championcooler.com? Your insights are important to us, and we are committed to addressing your concerns and ensuring your satisfaction. Thank you for giving us the chance to make things right. We hope to retain your trust and continue serving you as a loyal customer. Tina Wilson / Customer Service Supervisor / Champion Cooler
                  • Verified Purchase
                  1 found this review helpful
                  This 4500cfm (at single inlet pressure) does a consistently better job than my previous cooler. W...
                  This 4500cfm (at single inlet pressure) does a consistently better job than my previous cooler. While it can only bring 95 degree air down to 65, that's all I need. I've now had the same unit on my daughter's 900 sf house for 2.5 years, son's 1500 sf house 1 year and mine (1600sf up, walkout basement down) now for 1 month. All of them seem to be working fine, but you do need to have a clamp on amp meter to check the current draw (at breaker box), my son's burned up a motor in about one year, when I checked it with the same Dial motor I found it needed a different pulley (sheave) to be adjusted into the right amp range.
                  by
                  Response from EssickAirProductsJun 17, 2018
                  Hi, Bill. Thanks so much for taking the time to give us your feedback. We appreciate it! - Sydney, Essick Air Products
                  • Verified Purchase
                  • Recommended
                  2 found this review helpful
                  Our last one rusted out in 10 years. When it was time to replace, we knew MasterCool was the bes...
                  Our last one rusted out in 10 years. When it was time to replace, we knew MasterCool was the best. We got it installed right before the heat came to Tucson. This new unit works much better than the old one. I do wish it came with a plastic media instead of cardboard and was already either rust-proof or stainless.
                  by
                  • Verified Purchase
                  • Recommended
                  3 found this review helpful
                  Fantastic
                  This unit is exceptional, a real upgrade from its 20 year old Champion predecessor. The manufacturing exudes quality, and my regular HVAC guy and his son complimented the unit specifically several times each. The performance is phenomenal and when pairedp with its max 3/4 HP motor it matches an old 6500 CFM unit and 1 HP motor. My house is now cool, comfortable, and when installed correctly by experienced professionals, the low setting is extremely quiet. And what a great price!
                  by
                  Response from EssickAirProductsOct 13, 2025
                  Hello! Thanks for taking the time to rate and review our product. We love stars! -Melissa, Champion Cooler
                    • Recommended
                    This customer chose to rate the product and not provide text.
                    by
                    • Verified Purchase
                    This customer chose to rate the product and not provide text.
                    by
                    • Verified Purchase
                    This customer chose to rate the product and not provide text.
                    by
                    • Verified Purchase
                    I would have given this a 5 star, but the float valve and supply line included are cheap, so I replaced it immediately. Otherwise, this is a great evaporative cooler.
                    by
                    Response from EssickAirProductsJun 19, 2024
                    Hello, Brian! We appreciate you taking the time to share your thoughts. -Melissa, Champion Cooler
                    • Verified Purchase
                    Showing 1-10 of 36 reviews

                    Compare Key Features

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                    Product Snapshot

                    Ideal for whole-house cooling in dry climates, covering 1650 sq. ft. with powerful 5000 CFM airflow.
                    Ideal for homeowners looking for powerful cooling, making temperature control easier and more efficient with up to 90% efficiency.
                    Ideal for whole-house cooling in dry climates, covering 1650 sq. ft. with 5000 CFM airflow for efficient performance.
                    Ideal for whole-house cooling in dry climates, covering 2, 300 sq. ft. with powerful 7, 000 CFM airflow.

                    CFM Rating

                    5000
                    3970
                    5000
                    7000

                    Cooling Area

                    1650 sq. ft.
                    1820 sq. ft.
                    1650 sq. ft.
                    2300 sq. ft.

                    Water Tank Capacity

                    8 gallons
                    11 gallons
                    10 gallons
                    10 gallons

                    Type of Draft

                    Side Draft
                    Down-draft
                    Down-draft
                    Side Draft

                    Remote Control