# Archives

Chart below is a “Rule of Thumb” Guide Only Not a Substitute For an Engineered Calculation
When in doubt, always choose one size larger

1. Consult zone map to find correct zone
2. Consult table to find correct “minutes per air change” for your zone
3. Determine area to be cooled in cubic feet (building length x width x height)
4. Divide cubic feet (step 3) by minutes per air change (step 2) to determine CFM
5. Select correct Champion Cooler model according to CFM and expected static pressure

If CFM falls between models, choose the larger model

High means places with unusual heat sources from hot equipment or processes, crowded conditions, etc.

Normal means no unusual heat sources – typical home or office.

Exposed means walls, roof exposed to the sun, poor insulation, etc.

Insulated means walls and roof well insulated and/or shaded.

EXAMPLE

A house in Phoenix AZ, 40 feet long by 30 feet wide with an 8-foot ceiling. Insulated, no unusual heat sources.

30 x 40 x 8 = 9,600 cubic feet
Zone: 2
Minutes per Air Change: 2
9,600 / 2 = 4,800 CFM

A 4800 CFM Cooler model is indicated.

# Select An UltraCool Unit for Your Area

## See the map and chart below to help you select a proper sized UltraCool Unit for your home

Select area A, B or C where you live from the map
See the approximate square footage you’d like to cool on the chart
Select the UltraCool Model that best matches your square footage
Note: Aspen pad type coolers must be a larger cfm size to do the same areaCalculations based on approximately 80º F room temperature with 8′ ceilings
Always choose the next larger size up when in doubt

Note: Beginning with the gray area and Eastward,
evaporative cooling efficiency decreases tremendously.
Evaporative cooling can still be used,
especially for greenhouse cooling & humidification.

 UltraCool
 Approximate Square Footage To Be Cooled UltraCool Model Number Horsepower Zone A Zone B Zone C Side Draft Down Draft ASA 50 ADA 50 1/2 1000 1200 1400 ASA 50 ADA 50 3/4 1200 1400 1600 ASA 70 ADA 70 3/4 1600 1800 2000 ASA 70 ADA 70 1 1800 2000 2200