The following chart summarizes the amount of temperature decreased in the premises by the C2India Evaporative Air Cooler. It depends on the relative humidity and temperature of the ambient air.

For example, under the temperature of 35 °C and the relative humidity of outside air 50%, the air in the premises will be cooled to 28.5 ° C (drop of temperature for 6.5 °C). Under the temperature of outside air 45 °C and relative humidity of outside air 30%, the air in the premises will be cooled to 32.5 °C (drop of the temperature for 12.5 °C). However the level of comfort in the premises depends not only on decrease of the temperature in the premises but also on the movements of the air in the premises. So regarding 1st example the real feeling of heat by the body of the person as a result of influence of these two factors (decreasing of temperature and movements of the air) will be approximately corresponding to 25 °C. Regarding the 2nd example the real feeling of heat by the body of the person will be approximately corresponding to 31 °C. This is the phenomenon of evaporative air cooling, creating required level of comfort for people, animals & plants.

SUPPLY AIR TEMPERATURE:

Ambient Dry Bulb Temperature Degree(°C)

Relative Humidity

10%

20%

30%

40%

50%

60%

70%

80%

90%

10

4.0

4.5

5.5

6.0

7.0

7.5

8.0

9.0

9.5

15

7.5

8.5

9.5

10.5

11

12

13

13.5

14.3

20

11

12

13

14.5

15.5

16.5

17.5

18.5

19

25

14.5

16

17

18.5

20

21

22

23

24

30

17.5

19.5

21

22.5

24

25

26.5

28

29

35

20

23

25

26.5

28.5

30

31.5

32.5

34

40

23

26.5

29

31

32.5

34.5

36.5

N/A

N/A

45

26

29

32.5

35

39.5

41

N/A

N/A

N/A

50

29

32.5

36.5

43.5

N/A

N/A

N/A

N/A

N/A

*Supply air temperature is taken at outlet of fan.

TEMPERATURE SENSATION ON HUMAN:

Air Velocity m/s

Supply Air Temperature °C

25

26

27

28

29

30

31

32

Equivalent Temperature Sensation on Human °C

8

22.1

23.5

24.7

26.5

27.8

29.2

29.8

32.2

9

22.1

23.5

24.7

26.5

27.8

29.2

29.8

31.2

10

22.0

23.3

24.5

26.2

27.4

29.0

29.6

31.0

11

22.0

23.2

24.5

26.2

27.4

29.0

29.6

31.0

12

21.9

23.1

24.3

26.0

27.2

28.8

29.4

30.6

*When air passes over human skin, it causes a sensation of 2-3 degree lower than supply air temperature.