This is a great question. Here is what we can tell you.

1) Know the Temperature and Humidity of where you plan to use the cooler

We have used our cooler in California and have seen up to 20+ degree colder air coming out of the unit. Keep in mind that a swamp cooler works off of ambient temperature and humidity(Click to view chart). Generally, swamp coolers start to become less efficient when the humidity is over 50 percent. A swamp cooler can lower ambient temperature a good 6 to 10+ degrees and allow you take that well deserved nap.

Weather constantly changes and so will the output of your swamp cooler. You may be running your cooler on one trip and get 20 degree colder air and another trip you run it might only get 6 degree colder air. Review the chart in the link below. The takeway here is that the output of the cooler is based on humidity/temperature.

Due to the evaporative process used by these swamp coolers, they are best used in hot, dry climates, including the Southwestern and Western United States.

2) A Swamp Cooler is NOT an Air Conditioner.

Air Conditioners work off a completely different set of standards than does a swamp cooler.

Click here and review this chart to see if a swamp cooler makes sense for you

2) How big is the area you intend to cool?

Our cooler will not cool off your 1,800 square foot home. Not even close!

The fan used in Evaporative Cooler is what defines the space the cooler can cool. Evaporative Coolers are rated by CFM's (Cubic Feet Per Minute). This is the amount of air the fan in the cooler can push.

The computer fan we use (Model AFC1212DE @ 1.6 amps) is a relatively high rated at almost 155 cfm. We recommend you think about additional small battery operated fan(s) to assist the swamp cooler in moving the air inside the space. We have found this becomes more important when you start reaching the maximum size area of the cooler.

Our bucket cooler (based on the fan output) is sized for an area of 311 cubic feet.

So a maximum area would be around 7 foot long by 7 foot wide area with a 6 1/2 foot ceiling height

(7foot wide x 7foot long) X 6.5 foot ceiling = 318.5 cubic feet

318.5 cubic feet / 2 = 159.25 CFM needed.

A real world example: When we close off the bedroom in our RV and run our cooler it works great to cool off that room. In addition to just the swamp cooler we utilize 1 to 2 small battery operated fans to move the air from the cooler.