Evaporative Swamp
Swamp Cooler – How To Pick The Right Size To Really Cool A Room
The swamp cooler is becoming more and more popular as a cost effective way to cool or an automotive shop. They do not rely on the standard refrigeration process in order produce cooler air. A typical swamp cooler uses good old fashion evaporation to cool air in a room. This evaporation process is both energy efficient and easy on the environment. Swamp coolers have been used for decades in dry, desert climates where they work the best, but you will also see these units behind the benches of your favorite football team in those hot September months. Auto shops have also started using them as an inexpensive way to keep their shops cooler and mechanics more productive. However, there may be some confusion on how they operate and how to select the correct size swamp cooler.
The temperature of air coming out of an swamp cooler obviously depends on the temperature and the humidity of the air going in. A swamp cooler can deliver comfortable air under a wide variety of typical summertime temperature and humidity ranges.
In addition to dropping the temperature of the air, evaporative cooling offers an additional cooling benefit. The constant movement of the air created by the blower – the cooling breeze it creates, if you will – makes the occupants of a room feel 4 to 6 degrees cooler than the actual temperature. This is the same effect you feel when you turn on a ceiling fan or a simple window fan. For this reason, the “effective temperature” created by an evaporative cooler will feel 4 to 6 degrees cooler than temperatures shown on the chart.
An added benefit of evaporative cooling is that it works best in the hottest time of the day. As the temperature outside increases as the sun climbs, the humidity normally drops. In the early morning, for example, the temperature may be 70 degrees, with a relative humidity of 60 percent. By mid-afternoon, when the temperature has climbed to 90 degrees, the humidity may well have dropped to 30 percent – conditions that make the swamp cooler work more effectively.
For a swamp cooler to effectively cool, it must be the proper size for the job. A small portable unit, for example, will not adequately cool a large-sized room.
While the output of air conditioners are rated in BTUs (British Thermal Units), portable evaporative coolers are rated by CFMs (the cubic feet per minute of air that the cooler can blow into your home).
Whether it is for a single room or a whole house, there is a simple formula for determining the proper size of swamp cooler you need. Figure the cubic feet of space you want to cool, and then divide that number by two. The quotient will give you the CFM rating for the proper-sized evaporative air cooler.
For example, if you have a 1,500 square foot home with 8 foot-high ceilings:
1,500 x 8 = 12,000 cubic feet
12,000 % 2 = 6,000 CFM needed
Now you armed with the proper information to select the right swamp cooler for you. However, this formula may not always be needed or work for you. A good example is a large auto shop. The actual square footage may immense, but don’t let this discourage you from purchasing a swamp cooler. Many auto shops purchase a unit and aim it directly on the mechanic working. The mechanic still gets the benefit of the cool air from the swamp cooler, even though it is not cooling the entire shop. Another good example is a football team using one in an open stadium. They are obviously not trying to cool the entire stadium, just the players.
About the Author
Jason has been in the construction equipment and industrial sales business for over 10 years. He owns and operates Red Hill Supply to better serve the automotive and industrial industries. –
Automotive Tools
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How to Buy an Evaporative Swamp Cooler
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EVAPORATIVE 3-SPEED AIR SWAMP COOLER/FAN/HUMIDIFIER w/ IONIZER+REMOTE CONTROL $131.95 |
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Champion Evapcool 3000-CFM Evaporative (Swamp) Cooler $399.99 |
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CP18 600-CFM 120V Portable Evaporative Swamp Cooler $170.00 |
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1-1/3-HP 230-Volt 2-Speed Evaporative Swamp Cooler Motor $99.00 |
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Champion Evaporative Swamp Cooler. 21,000 CFM 5 HP 3Q Power Model 14/21 SD $1,995.00 |
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Champion Evapcool 6500-CFM Evaporative (Swamp) Cooler $559.99 |
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Champion Evapcool 350-CFM Evaporative (Swamp) Cooler $206.00 |
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Champion Evapcool 650-CFM Evaporative (Swamp) Cooler $249.99 |
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Champion Evapcool 4500-CFM Evaporative (Swamp) Cooler $569.00 |
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Champion Evapcool 3500-CFM Evaporative (Swamp) Cooler $449.99 |
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Champion Evapcool 4800-CFM Evaporative (Swamp) Cooler $472.99 |
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Champion Evapcool 4500-CFM Evaporative (Swamp) Cooler $463.99 |
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Champion Evapcool 3000-CFM Evaporative (Swamp) Cooler $459.99 |
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3/4-HP 115-Volt 2-Speed Evaporative Swamp Cooler Motor $109.99 |
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1/2-HP 115-Volt 2-Speed Evaporative Swamp Cooler Motor $89.99 |
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3/4-HP 115-Volt 1-Speed Evaporative Swamp Cooler Motor $99.99 |
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1/3 HP 115-Volt 2-Speed Evaporative Swamp Cooler Motor $79.99 |
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1/2-HP 115-Volt 1-Speed Evaporative Swamp Cooler Motor $79.99 |
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1/3 HP 115-Volt 1-Speed Evaporative Swamp Cooler Motor $82.99 |
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1/3-HP 2-Speed 115V Evaporative Swamp Cool Motor $83.99 |
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AdobeAir MasterCool II Evaporative Swamp Air Cooler $599.00 |
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NEW Mobile Portable Evaporative Swamp Cooler Ionizer $148.75 |
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Essick CP35 Evapcool 350 CFM Portable Ultracool Evaporative Swamp Cooler $199.99 |
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Essick / Champion CP18 UltraCool 600CFM Portable Evaporative (Swamp) Cooler $159.99 |
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Champion MMBT14 Evapcool 4000 CFM Portable Ultracool Evaporative Swamp Cooler $599.99 |
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Dial 2204 1/2 HP 115V 2 Speed Evaporative Swamp Cooler Replacement Motor $89.99 |
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Evapcool 2800-CFM Window Evaporative (Swamp) Cooler $360.00 |
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New Mastercool 21,000CFM 240 volt Evaporative Swamp Cooler Pump Model CP480B $35.00 |
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PPS # 81564 3/4 HP 115V 2 Speed Evaporative Swamp Cooler Replacement Motor $129.99 |
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PPS # 81524 1/3 HP 115V 2 Speed Evaporative Swamp Cooler Replacement Motor $99.99 |
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PPS # 81544 1/2 HP 115V 2 Speed Evaporative Swamp Cooler Replacement Motor $99.99 |
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Dial Mfg 2201 1/3 HP 115V 1 Speed Evaporative Swamp Cooler Replacement Motor $79.99 |
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Dial Mfg 2202 1/3 HP 115V 2 Speed Evaporative Swamp Cooler Replacement Motor $84.99 |
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Dial Mfg 2203 1/2 HP 115V 1 Speed Evaporative Swamp Cooler Replacement Motor $84.99 |
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Dial Mfg 2204 1/2 HP 115V 2 Speed Evaporative Swamp Cooler Replacement Motor $89.99 |
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Dial Mfg 2205 3/4 HP 115V 1 Speed Evaporative Swamp Cooler Replacement Motor $99.99 |
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Dial Mfg 2206 3/4 HP 115V 2 Speed Evaporative Swamp Cooler Replacement Motor $99.99 |
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Dial 3453 40″ x 28″ x 12″ Rigid Mastercool Evaporative Swamp Cooler Filter Media $119.99 |
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Dial 3438 40″ x 28″ x 8″ Rigid Mastercool Evaporative Swamp Cooler Filter Media $89.99 |
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Dial 3437 40″ x 23″ x 8″ Rigid Mastercool Evaporative Swamp Cooler Filter Media $69.99 |
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Dial Mfg 3080 36″ x 20′ Dura-Cool Cut To Fit Evaporative Swamp Cooler Filter Pad $59.99 |
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Dial Mfg 1540 115V Power Clean Purge Pump for Evaporative Swamp Coolers $49.99 |
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PPS # AC-1 8″ x 40″ x 28″ Single Inlet Evaporative Swamp Cooler Filter Media $109.99 |
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(6) PPS Pkg # 6IP 20″ x 22″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $19.99 |
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(6) PPS Pkg # 3IP 24″ x 30″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $25.99 |
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(6) PPS Pkg # 7IP 22″ x 24″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $27.99 |
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(6) PPS Pkg # 4IP 20″ x 36″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $29.99 |
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(6) PPS Pkg # 45IP 24″ x 24″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $29.99 |
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(6) PPS Pkg # 2IP 22″ x 34″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $29.99 |
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(6) PPS Pkg # 12IP 28″ x 32″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $29.99 |
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(6) PPS Pkg # 44IP 24″ x 27″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $32.99 |
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(6) PPS Pkg # 1IP 28″ x 34″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $32.99 |
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(6) PPS Pkg # 5IP 24″ x 36″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $32.99 |
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(6) PPS Pkg # 46IP 29″ x 29″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $32.99 |
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(6) PPS Pkg # 49IP 30″ x 30″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $32.99 |
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(6) PPS Pkg # 8IP 30″ x 36″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $35.99 |
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(6) PPS Pkg # 24IP 32″ x 36″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $36.99 |
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(6) PPS Pkg # 30IP 32″ x 40″ Aspen Snow-Cool Evaporative Swamp Cooler Pad $42.99 |
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PPS Pkg. # 300-1 1 Gallon Submarine Sealer Paint for Evaporative Swamp Coolers $19.99 |
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(6) ea PPS # 300-1 1 Gallon Submarine Sealer Paint for Evaporative Swamp Coolers $109.99 |
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Evaporative Swamp Air Cooler with Humidifier – by Sunpe $145.00 |
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Evaporative Swamp Cooler – by Sunpentown $135.00 |
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2 – Evaporative/Swamp Cooler Parts – 1″ Shaft Collar W/ Gasket $4.00 |
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NEW Swamp Cooler Bleed-off Kit 1/2″ Dial Evaporative $14.99 |
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SPT SF-611 Portable Evaporative Swamp Air Cooler with Cooling Pad $119.95 |
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New Mobile Portable Evaporative Air Swamp Cooler w Box $263.10 |
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Champion 5,000-CFM Evaporative (Swamp) Window Cooler With Remote Control $619.00 |
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New Mastercool 7500CFM 240 volt Evaporative Swamp Cooler Pump Model CP400B $30.00 |
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Champion M150 Ultracool 1100 CFM Portable Gadabout Jr Evaporative Swamp Cooler $259.99 |
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New Power Clean 115v Purge Pump for Evaporative Swamp Coolers By Dial Mfg. Inc $45.00 |
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KuulAire Portable Evaporative Swamp Cooler – Port-A-Cool KA50 – 750 CFM – NEW $252.90 |
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3-SPEED EVAPORATIVE OSCILLATING AIR SWAMP COOLER/HUMIDIFIER/FAN w/ REMOTE+TIMER $121.95 |
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NEW! QUIET EVAPORATIVE AIR SWAMP COOLER/HUMIDIFIER/FAN w/ IONIZER+REMOTE CONTROL $112.95 |
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NEW Symphony Portable Air Evaporative Swamp Cooler CFM $220.32 |
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Champion Mastercool 120V 4000-CFM Portable Ultracool Evaporative (Swamp) Cooler $629.00 |
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Evaporative Air Swamp Cooler Ionizer Conditioner SF-613 $109.00 |
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Evaporative Air Swamp Cooler Ionizer Conditioner SF-613 New $109.99 |
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2 – Evaporative/Swamp Cooler Parts – 3/4″ Shaft Collar W/ Gasket $6.00 |
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Weather Guard Canvas Evaporative Cooler Cover 34″ x 34″ x 36″ Swamp Cooler Cover $30.00 |
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3/4 HP 2 Speed Evaporative Swamp Cooler Motor 115 Volt NEW Evap Cool Motor $89.99 |
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Dial 2204 1/2 HP 115V 2 Speed Evaporative Swamp Cooler Replacement Motor $79.99 |
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Champion Evapcool 5000-CFM Window Evaporative (Swamp) Cooler $609.00 |
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Champion Evapcool 4000-CFM Window Evaporative (Swamp) Cooler $599.99 |
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Handy Cooler – First-ever Hand Held Evaporative Battery Fan in Black. Cools air up to 30F. Runs on batteries or USB. $32.50 This is the real thing, not that knockoff! The one and only original Handy Cooler, with our official logo marked on the product, instructions and packaging. **Small fan that can cool air up to 30F. This revolutionary evaporative cooling fan is the closest thing to a hand held mini air conditioner! Use it outdoors or keep it indoors as a desk fan. Provides gentle cool breeze. Uses evaporative cooli… |
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SPT SF-608R Portable Evaporative Air Cooler $76.25 Sunpentown Evaporative Air Cooler. Conveniently rolls from room to room and uses LESS energy than Air Conditioners! The Air Cooler does exactly what the name implies, though it’s not an air conditioner. Here’s how it works: The Evaporative Air Cooler sucks air through a wick saturated with water. As the air flows through the wick, some of the water evaporates into the air, consuming the heat that’… |
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KuulAire PACKA45 Portable Evaporative Cooling Unit with 200 Square Foot Cooling Capacity, 375 FCM, Black $154.99 When it’s hot enough for ya, you need a solution and evaporative coolers can really help. The problem is that many of them look like abandoned lab equipment. Not this Kuulaire 375 evaporative cooler, though. It cools a 200 sq. ft. area by 10 to 25deg F with a 4-gal. water reservoir and 375 CFM fan. The fan’s attractive case features swing louvers to direct the cooled air and has casters for portab… |
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Evaporative Coolers Cooling Neck Band Evaporative Coolers Cooling Neck Band is designed to drape around the neck and held in place. Evaporative body cooling garments harness the COOLING ENERGY that is produced when water naturally changes from liquid to gas. (Evaporation). Cooling vests body cooling are efficient and effective cold packs, which cool the body in any environment, under or over clothes and are light weight. Our cooling g… |
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Drive Medical Adjustable Universal Rear, Anti-Tipper with Wheels, Black $45.87 Adjustable Universal Rear, Anti-Tipper With Wheels… |
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Nutrabolics Fight Factor, Fruit Punch, 11-Ounce $24.44 Nutrabolics Fight Factor 315 g… |
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Small Fan & Mini-Air Conditioner: The Original Handy Cooler in Blue. Portable and convenient. Runs on batteries or USB. Cools air up to 30F. $34.30 Small fan that can cool air up to 30F. This revolutionary evaporative cooling fan is the closest thing to a hand held mini air conditioner! Use it outdoors or keep it indoors as a desk fan. Provides gentle cool breeze. Uses evaporative cooling technology. Add water to soak the cooling filter. Ambient air is forced through the wet cooling filter and cools down. Works best in dry and hot climates. F… |
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Small Fan & Mini-Air Conditioner: The Original Genuine Handy Cooler in Pink. Cools air up to 30F. Runs on USB or batteries. Genuine version with logo: Handy Cooler. $36.00 Small fan that can cool air up to 30F. This revolutionary evaporative cooling fan is the closest thing to a hand held mini air conditioner! Use it outdoors or keep it indoors as a desk fan. Provides gentle cool breeze. Uses evaporative cooling technology. Add water to soak the cooling filter. Ambient air is forced through the wet cooling filter and cools down. Works best in dry and hot climates. F… |
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24×24 Aspen Snow-Cool Premier Cooler Pad (6 Pack) $41.94 These pads are NOT to be used for conveyor-type swamp coolers!… |
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impco Air Coolers (ADOMMB14) Mobile MasterCool 1/2 HP Personal Evaporative Cooler $1,207.14 Designed for maximum velocity Dual air inlet design requires less floor space Quiet, concentrated air distribution Cools residential, commercial, agricultural and industrial hot spots 4,500 cfm; area cooled: 1,400 sq. ft.An affordable solution to spot cooling, the Mobile MasterCool® line provides powerful evaporative cooling. Constructed of powder coated metal with the strength of encapsulated s… |
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