Model # ASA51

Internet #100662181

Store SKU #356002

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


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

  • Designed to work in dry/arid climates
  • Is not an air conditioner
  • High quality components at low costs
$912.46 /each

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Product Overview

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.

  • Side discharge design
  • Circulates air at up to 5,500 CFM based on motor speed
  • Cools up to 1,650 sq. ft. for whole-house cooling
  • Designed for use with 1/3, 1/2 or 3/4 HP motor (sold separately)
  • Uses high performance 8 in. rigid media
  • Easy connect to water supply for continuous operation
  • Unique perforated air inlet screen provides more air flow than the competition
  • Galvanized-steel cabinet provides durability
  • Tough, polyester-resin coating on exterior surfaces
  • Blower wheel designed for quiet operation
  • UL classified for safe operation
  • Evaporative cooler performs best in dry, arid climates
  • Made in Denison, TX
  • Which type of evaporative cooler is best suited for your needs?
  • Areas best suited for evaporative coolers:

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Name 5000 CFM Down-Draft Roof 8 in. Media Evaporative Cooler for 1650 sq. ft. (Motor Not Included) 5000 CFM Side-Draft Wall/Roof 8 in. Media Evaporative Cooler for 1650 sq. ft. (Motor Not Included) 7000 CFM Side-Draft Wall/Roof 8 in. Media Evaporative Cooler for 2300 sq. ft. (Motor Not Included) 5000 CFM 120-Volt 2-Speed Side-Draft Wall/Roof 12 in. Media Evaporative Cooler for 1650 sq. ft. (with Motor)
Brand MasterCool MasterCool MasterCool MasterCool
Ratings (15) (10) (8) (6)
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Warranty / Certifications

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Customer Questions & Answers


Asked by: DMG
The recommended application for the ASA51 or ASA35 is as follows: A steady water supply is required for the operation of this cooler. If water source comes from an external water faucet, a sillcock and shutoff valve will need to be purchased and installed. 1. Install sillcock and water valve on faucet. 2. Run ¼” plastic or copper tubing from the faucet to the unit. 3. Install one end of tubing to water valve by placing nut and ferrule on tubing and tightening the nut until water tight. (Note:- do not connect the water supply to any soft water application.)
Answered by: EssickAirProducts
Date published: 2016-10-10

Can home Base install this cooler, or recommend an installer. Redding, California 96002

Will be installed on a mobile home
Asked by: Dennis
The manufacturer is unable to recommend an installer. However, you may check with any local HVAC technician.
Answered by: EssickAirProducts
Date published: 2016-06-01

What size duct is needed, and how big is outlet opening?

Asked by: carl
The duct opening is 17 3/4'' x 17 3/4''.
Answered by: CommunityAnswer
Date published: 2016-02-08
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Customer Reviews

5000 CFM Side-Draft Wall/Roof 8 in. Media Evaporative Cooler for 1650 sq. ft. (Motor Not Included) is rated 4.5 out of 5 by 10.
Rated 5 out of 5 by from Good Buy This cooler works great. I've had it installed for about two months now with no problems, absolutely no leaks, and very good operation. The only negative comments I have are: the sheet metal is somewhat flimsy, so you have to be careful when you remove the inspection panels not to bend them; a couple of sheet metal screws were over-tightened at the factory and the threads were stripped as a result; the filter media added a mild but odd odor to the air for the first week or so of operation. I would abolutely buy this cooler again and I would recommend it to a friend. Strangely, it was much cheaper to buy the bare unit and purchase the motor, pulley, and purge pump separately rather than buying a complete assembled unit.
Date published: 2012-08-28
Rated 3 out of 5 by from Bitter sweet... Though I have had good luck w/ Home Depot in the past I wasn't so lucky with this one. I purchased it because it had free shipping - for a 200 pound piece of equipment that is a plus. However it arrived dented in three different places. On top of that since I had a used 3/4 hp motor all I needed was the pulley and the one recommended for this unit had the wrong bore shaft. Other than that it works great just looks like it has been around the block. I guess I could have refused shipment but what would you do if you lived in Arizona in June?
Date published: 2011-05-31
Rated 5 out of 5 by from Simply The Best I ordered this online for pickup at my local store. I had the same model on my Phoenix house for 18 years before the cabinet rusted through and needed replacement, so this one was easy to just put up in its place. The pads last for years at a shot, so you eventually save money over Aspen pad models. The sections (wet section and blower cabinet) are able to be separated for ease of transport and I was able to get the entire thing in the back of my SUV. All in all a very high quality unit.
Date published: 2012-05-08
Rated 5 out of 5 by from Awesome Cooler This the third mastercool unit I've owned for different houses. The air feels much like AC in that it's cold like AC but not overly humid like your typical swamp cooler. Even during the humid monsoon season this unit gets us through quite comfortably! I've got mine connected to a thermostat and couldn't be happier!!
Date published: 2012-05-27
Rated 5 out of 5 by from Much better than the old unit . This unit is designed much better than the previous mastercool cooler I had. The thermoplastic wet section should last much longer than the original unit .
Date published: 2014-03-18
Rated 4 out of 5 by from Only the best for my tenants... As a home owner, we have a single rigid media pad unit (AeroCool Pro) on our home. It is VASTLY better than a standard 3-sided evap cooler. It's lasted 15 yrs. now, with very minimal rust and corrosion evident. As a property owner, when it came time to replace a tenant's standard 3-sided evap. cooler (which hasn't lasted anywhere near as long and was completely rusted out), when I discovered a 3-sided unit and this one were only about $125 difference, I decided, if we COULD mount if to the side of the building, we WOULD install it. Needless to say, our tenants are completely happy. And, therefore, so are we. Please note, this unit is a standard residential unit and, thus, does not have a 2nd pump (purge) option, which our AeroCool Pro (The AeroCool Trophy series is the same as this unit) does. But this model does have a higher version, which is the same as our AeroCool Pro. If you can afford it, buy that one. The reason for less than 5 stars, is because there were some dings and paint damage to the unit upon delivery.
Date published: 2015-07-14
Rated 4 out of 5 by from Cooler purchase The product is good but when we removed it from the box to put it on the roof, it had several dents in it.
Date published: 2015-09-08
Rated 4 out of 5 by from Works exacly as needed. Overall the cooler was pretty simple to install. Once I figured out how to take it apart, that is. Keeps my green house at the temperature where I need it. The installation instructions around the motor/pulley were a bit on the vague side for someone who does not deal with this type of equipment. But, I was able to work around the issues encountered. Over all the unit works well, time will tell how long it will last.
Date published: 2012-10-19
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