24
Table 19 — Component Pressure Drops (in. wg)
Sizes N, P, Q (75-105 Ton Nominal Capacity)
LEGEND
COMPONENT
AIRFLOW (cfm)
15,000 19,000 23,000 27,000 31,000 35,000 39,000 43,000 47,000 52,000
High-Capacity Evaporator Coil (75-90)
0.05 0.10 0.14 0.18 0.22 0.26 0.29 0.32 0.34 0.37
High-Capacity Evaporator Coil (105)
0.04 0.09 0.14 0.19 0.24 0.28 0.32 0.36 0.40 0.44
Humidi-MiZer
®
System (75-105)
0.02 0.03 0.05 0.09 0.17 0.25 0.39 0.54 0.70 0.91
Hydronic Coil (75-105)
0.13 0.20 0.28 0.37 0.46 0.57 0.68 0.80 0.93 1.10
Steam Coil (75-105)
0.14 0.22 0.31 0.41 0.51 0.63 0.75 0.88 1.02 1.21
Low Gas Heat (75-105)
0.15 0.20 0.26 0.33 0.41 0.49 0.58 0.68 0.78 0.92
Medium Gas Heat (75-105)
0.18 0.25 0.33 0.42 0.51 0.62 0.73 0.85 0.98 1.15
High Gas Heat (75-105)
0.26 0.35 0.45 0.56 0.67 0.80 0.94 1.09 1.24 1.45
Electric Heat (108 kW)
0.05 0.08 0.12 0.16 0.21 0.27 0.34 0.42 0.50 0.62
Electric Heat (108 kW,
High-Static Supply Fan)
0.08 0.12 0.17 0.24 0.32 0.41 0.51 0.63 0.75 0.93
Electric Heat (144 kW)
0.06 0.09 0.13 0.18 0.23 0.30 0.38 0.46 0.55 0.68
Electric Heat (144 kW,
High-Static Supply Fan)
0.08 0.13 0.19 0.27 0.35 0.45 0.56 0.69 0.83 1.02
Electric Heat (190 kW)
0.06 0.10 0.14 0.19 0.26 0.33 0.41 0.51 0.61 0.75
Electric Heat (190 kW,
High-Static Supply Fan)
0.09 0.14 0.21 0.29 0.39 0.50 0.62 0.76 0.91 1.12
Electric Heat (265 kW)
0.07 0.11 0.15 0.21 0.28 0.36 0.46 0.56 0.67 0.82
Electric Heat (265 kW,
High-Static Supply Fan)
0.10 0.16 0.23 0.32 0.43 0.55 0.68 0.84 1.00 1.24
FILTERS
Mixed Air Filters
4 in. MERV 8
0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00
4 in. MERV 14
0.21 0.27 0.33 0.39 0.44 0.50 0.56 0.61 0.67 0.74
Cartridge Filter with 2 in. Pre-Filter
0.38 0.48 0.58 0.68 0.78 0.88 0.98 1.08 1.18 1.30
Cartridge Filter with 4 in. Pre-Filter
0.30 0.38 0.46 0.54 0.62 0.70 0.78 0.86 0.94 1.04
MERV 14 Bag with 2 in. Pre-Filter
0.30 0.38 0.46 0.54 0.62 0.70 0.78 0.86 0.94 1.04
MERV 14 Bag with 4 in. Pre-Filter
0.23 0.29 0.35 0.41 0.47 0.53 0.59 0.65 0.71 0.78
MERV 15 Bag with 2 in. Pre-Filter
0.30 0.38 0.46 0.54 0.62 0.70 0.78 0.86 0.94 1.04
MERV 15 Bag with 4 in. Pre-Filter
0.23 0.29 0.35 0.41 0.47 0.53 0.59 0.65 0.71 0.78
Final Filters
Cartridge Filter with 2 in. Pre-Filter
0.39 0.50 0.61 0.71 0.82 0.92 1.03 1.13 1.24 1.37
Cartridge Filter with 4 in. Pre-Filter
0.32 0.40 0.48 0.57 0.65 0.74 0.82 0.91 0.99 1.09
MERV 15 Bag with 2 in. Pre-Filter
0.32 0.40 0.48 0.57 0.65 0.74 0.82 0.91 0.99 1.09
MERV 15 Bag with 4 in. Pre-Filter
0.24 0.30 0.36 0.43 0.49 0.55 0.62 0.68 0.74 0.82
HEPA with 2 in. Pre-Filter
0.47 0.60 0.73 0.85 0.98 1.11 1.23 1.36 1.48 1.64
HEPA with 4 in. Pre-Filter
0.39 0.50 0.61 0.71 0.82 0.92 1.03 1.13 1.24 1.37
Economizer Pressure Drop
0.07 0.09 0.11 0.15 0.19 0.24 0.29 0.35 0.41 0.50
High-Static PE Fan (off)
0.02 0.05 0.09 0.12 0.15 0.19 0.24 0.30 0.35 0.44
Standard PE Fan (90-105) (off)
0.00 0.05 0.10 0.13 0.17 0.21 0.25 0.30 0.35 0.44
Standard PE Fan (75) (off)
0.06 0.08 0.10 0.13 0.15 0.20 0.25 0.29 0.36 0.43
Outdoor Airflow Station
0.00 0.03 0.07 0.09 0.11 0.14 0.17 0.20 0.23 0.28
PE — Power Exhaust