|Unlike air conditioning, evaporative cooling does not require an airtight structure to operate at maximum
efficiency. In fact, you need to allow your home to "breathe." Opening doors and windows or installing Up-
dux™ vents to let air escape to the attic properly ventilates your home.
Evaporative cooling is also an environmentally-friendly alternative to air conditioning since it has no CFC's
Evaporative coolers use 70% less power than air conditioning.
A 1500 square foot home is located in Phoenix, Arizona where the dry bulb temperature is 107, the wet
bulb temperature is 71, and the wet bulb depression is 36.
Assuming air conditioning supplies 500 square feet of cooling per ton, 3 tons of air conditioning would be
required to cool a 1500 square foot home. Since an air conditioner would probably run most of the time in
this climate, its electric usage would be approximately 3.6 Kw per hour depending on your utility.
Using an Essick, Champion or Tradewinds cooler with a minimum of 5000 CFM and ¾ horsepower motor,
total power consumption (motor and pump combined) would be approximately 0.991 Kw per hour.
If the air conditioner and the evaporative cooler ran for a comparable period of time, the ratio of energy
for the evaporative cooler to the air conditioner would be 0.991 Kw per hour to 3.6 Kw per hour, or 0.275.
This means the evaporative cooler would use 72 ½% less power than an air conditioner to cool the same
area in the same environment.
Energy Cost Savings
Assuming a new energy cost of .14¢ per Kwh, this comparison would result in a possible net savings of
($362.88 - $99.89) = $262.99 each month! With this type of savings, evaporative coolers are a significant
cost effective alternative to air conditioning.
Evaporative cooling provides 100% fresh, cool air continuously while traditional
refrigerated air conditioning utilizes a closed system that recirculates the same stale
dry air over and over. Constant air movement of the evaporative cooler pushes hot
air out removing dust, pollen, smoke, odor, and pollution and replaces it with cool