Table:
0
A
B
C
D
E
F
1
Usage
Class
Performance
Performance test
Particulate size approaching 100% retention
Test Standard
2
Primary filters
G1
65%
Average value
>5µm
BS EN779
3
Primary filters
G2
65–80%
Average value
>5µm
BS EN779
4
Primary filters
G3
80–90%
Average value
>5µm
BS EN779
5
Primary filters
G4
90%–
Average value
>5µm
BS EN779
6
Secondary filters
F5
40–60%
Average value
>5µm
BS EN779
7
Secondary filters
F6
60–80%
Average value
>2µm
BS EN779
8
Secondary filters
F7
80–90%
Average value
>2µm
BS EN779
9
Secondary filters
F8
90–95%
Average value
>1µm
BS EN779
10
Secondary filters
F9
95%–
Average value
>1µm
BS EN779
11
Semi Hepa
H10
85%
Minimum value
>1µm
BS EN1822
12
Semi Hepa
H11
95%
Minimum value
>0.5µm
BS EN1822
13
Semi Hepa
H12
99.5%
Minimum value
>0.5µm
BS EN1822
14
Hepa
H13
99.95%
Minimum value
>0.3µm
BS EN1822
15
Hepa
H14
99.995%
Minimum value
>0.3µm
BS EN1822

Questions and formulas:
Question: Which  Performance has a Test Standard of bs en779, and a Particulate size approaching 100% retention of >2µm, and a Class of f6?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(F1="bs en779")*(E1=">2µm")*(B1="f6")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(F2:F15="bs en779")*(E2:E15=">2µm")*(B2:B15="f6")),3))
Level: medium
Question: Which Performance has a Usage of hepa and a Class of h14?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(A1="hepa")*(B1="h14")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(A2:A15="hepa")*(B2:B15="h14")),3))
Level: medium
Question: Which Particulate size approaching 100% retention has a Usage of semi hepa and a Class of h12?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(A1="semi hepa")*(B1="h12")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(A2:A15="semi hepa")*(B2:B15="h12")),5))
Level: medium
Question: Which Test Standard has a Usage of secondary filters, and a Class of f5? Question 4
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(A1="secondary filters")*(B1="f5")),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(A2:A15="secondary filters")*(B2:B15="f5")),6))
Level: medium
Question: Which Performance has a Performance test of average value, and a Class of f6?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(D1="average value")*(B1="f6")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(D2:D15="average value")*(B2:B15="f6")),3))
Level: medium
Question: Which Class has a Performance test of minimum value, and a Usage of semi hepa, and a Performance of 99.5%?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(D1="minimum value")*(A1="semi hepa")*(C1="99.5%")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F15,(D2:D15="minimum value")*(A2:A15="semi hepa")*(C2:C15="99.5%")),2))
Level: medium