|
Table 1:Cleanroom HVAC requirements
|
||||||
|
(Recommended to meet and exceed Federal Standard 209E,209Class 1VLF,and ISO 14644-1)
|
||||||
|
ISO14644-1
Per cubic meter
|
209E
Intern. (SI)
|
209E English(USA)
per cubic ft.
|
Suggested minimum ceiling coverage
|
Suggested
filter type
|
Suggested minimum
air velocity
@ceiling level
|
Suggested minimum cleanroom
air changes
|
|
Class3
Particle counts
≥0.1μm-1,000
≥0.5μm-35
|
Class M
|
Class1
Particle counts
≥0.1μm-35
≥0.5μm-1
|
100%ceining coverage
|
ULPA filters providing efficiency of 99.99995% at 0.12μm
|
75 to 90 fpm (0.38to0.46m/sec)
|
500 to 640 ach
|
|
|
Class M 1.5
|
Class1
Particle counts
≥0.1μm-35
≥0.5μm-1
|
100%ceining coverage
|
ULPA filters providing efficiency of 99.99995% at 0.12μm
|
75 to 90 fpm (0.38to0.46m/sec)
|
450 to 640 ach
|
|
|
Class M 2
|
Class 10
Particle counts
≥0.1μm-99.1
≥0.5μm-2.83
|
100%ceining coverage
|
ULPA filters providing efficiency of 99.99995% at 0.12μm
|
70 to 80 fpm (0.36to0.41m/sec)
|
420 to 600 ach
|
|
Class4
Particle counts
≥0.1μm-10,000
≥0.5μm-352
|
Class M 2.5
|
Class 10
Particle counts
≥0.1μm-345
≥0.5μm-10
|
100%ceining coverage
|
ULPA filters providing efficiency of 99.99995% at 0.12μm
|
75 to 90 fpm (0.36to0.41m/sec)
|
420 to 600 ach
|
|
|
Class M 3
|
Class 100
Particle counts
≥0.1μm-991
≥0.5μm-28.3
|
80%ceining coverage
|
HEPA filters providing efficiency of 99.99995% at 0.12μm
|
50 to 70 fpm (0.26to0.36m/sec)
|
300 to 480 ach
|
|
Class5
Particle counts
≥0.1μm-100,000
≥0.5μm-3520
|
Class M 3.5
|
Class 100
Particle counts
≥0.1μm-3,450
≥0.5μm-100
|
75%ceining coverage
|
HEPA filters providing efficiency of 99.99995% at 0.12μm
|
50 to 70 fpm (0.26to0.36m/sec)
|
300 to480 ach
|
|
Class6
Particle counts
≥0.1μm-1,000,000
≥0.5μm-35200
|
Class M 4.5
|
Class1000
Particle counts
≥0.5μm-1,000
|
40%ceining coverage
0.1μm-34,500
|
HEPA filters providing efficiency of 99.99995%
|
30 to 50 fpm (0.15to0.25m/sec)
|
180 to 300 ach
|
|
Class7
Particle counts
≥0.1μm-1,000
≥0.5μm-35
|
Class M 5.5
|
Class10,000
Particle counts
≥0.1μm-345,000
≥0.5μm-10,000
|
30%ceining coverage
|
HEPA filters providing efficiency of 99.99995% at 0.3to0.5μm
|
20 to 30 fpm (0.10to0.15m/sec)
|
60 to 100 ach
|
|
Class8
Particle counts
≥0.5μm-3,520,000
|
Class M 6.5
|
Class100,000
Particle counts
≥0.1μm-3,450,000
≥0.5μm-100,000
|
15%ceining coverage
|
HEPA filters providing efficiency of 99.99995% at 0.12μm
|
15 to 20 fpm (0.08to0.10m/sec)
|
36 to 90 ach
|
|
Note:Air changes developed for cleanroom heights 9,to16,
|
||||||
|
Table2:Generic cleanroom class M3.5(ISO Class5)
|
||||
|
Mechanical equipment operating costs breakdown
|
||||
|
|
Typical(avr.12facilities,old)
|
Altern.(avr.12facilities,new)
|
||
|
System compinent
|
%of total year
|
$/sq.ft.year
|
%of total
|
$/sq.ft.year
|
|
Make-up AHUs
|
11
|
2.86
|
16
|
2.72
|
|
Recirculating AHUs
|
35
|
9.1
|
|
|
|
Cooling:DX air-cooled units
|
34
|
8.84
|
|
|
|
Heating:Steam,zone reheat-electric
|
9
|
2.34
|
|
|
|
Humidification:Steam
|
1
|
0.26
|
|
|
|
Exhaust fans
|
10
|
2.6
|
15.3
|
2.6
|
|
Fan-filter units
|
|
|
20.2
|
3.43
|
|
Cooling:Chillers with cooling towers
|
|
|
39
|
6.63
|
|
Heating:Hot water zone reheat-hot water
|
|
|
9
|
1.53
|
|
Humidification:Adiabatic
|
|
|
0.5
|
0.85
|
|
TOTAL for 40,000-60,000
sq.ft facility with actualcleanroom occuping 30-40%lf facility space |
100%
|
$26.00
|
100%
|
$17.76
|
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