Evaporative Cooling versus Air Conditioning Capacity Comparison
Many people ask about the capacity of our portable evaporative coolers as compared to air conditioning units, perhaps this will be of assistance:
Based on design conditions for air conditioners of 80°F db and 67°F wb
Approximate Loads
Unit BTUh Sensible Latent Design Airflow
20-ton AC 240,000 171,500 57,200 6,350 cfm (est)
5-ton AC 60,000 42,700 14,200 1,580 cfm
3.25-ton AC 39,000 28,600 9,500 1,060 cfm
2.167-ton AC 26,000 19,100 6,400 708 cfm
1.5-ton AC 18,000 14,300 4,800 530 cfm
0.83-ton AC 10,000 7,200 2,400 265 cfm
PAC36 EC 97,050 97,050 na 9,600 cfm
TwistAire EC 54,540 54,540 na 5,000 cfm
Since Evaporative Cooling uses only 100% outside air the equipment does not have the component of latent load that the AC equipment must satisfy.
Comparing the EC capacity to the AC sensible capacity only:
 | Port-A-Cool 36" (9,600 cfm) would be equivalent to a 10 ton AC unit at 80/67 conditions. |
| TwistAire (5,000 cfm) would be equivalent to a 6 ton AC unit at 80/67 conditions. |