EXHIBIT 2. Estimated Percentage of Particle Removal for Portable Units by CADR and by Room Size

 

Percentage of Particles Removed

Room Size

CADR

Smoke (20 min.)

Dust (20 min.)

Pollen (10 min.)

AC

T

AC

T

AC

T

5 x 6

10
40
80

49%
89%
95%

68%
97%
100%

49%
88%
95%

70%
98%
100%

–
57%
75%

–
93%
99%

9 x 12

40
80
150

53%
76%
89%

71%
89%
98%

52%
75%
89%

72%
89%
98%

24%
40%
58%

78%
86%
94%

12 x 18

80
150
300
350
450

53%
74%
89%
–
–

71%
87%
97%
–
–

52%
73%
–
91%
–

72%
88%
–
99%
–

24%
38%
–
–
69%

78%
85%
–
–
97%

18 x 24

150
300
350
450

51%
73%
–
–

70%
87%
–
–

50%
–
77%
–

71%
–
91%
–

23%
–
–
50%

78%
–
–
91%

20 x 30

300
350
450

63%
–
–

79%
–
–

-67%-

-84%-

-40%

-86%-

AC=Removal by the air-cleaning device
T= Removal by the air-cleaning device plus natural settling
Note: Estimates ignore the effect of incoming air. For smoke and, to a lesser extent, dust, the more drafty the room, the smaller the CADR required. For pollen, which enters from outdoors, a higher CADR is needed in a drafty room.
Source: Reference26.