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RT-PRC031-EN 71
Performance Data—Heat
Table 30 Hot Water Coil Heating Capacities (Q/ITD)
Water
Flow High Capacity Low Capacity
(GPM) 40 80 120 160 200 30 60 100 140 175
Casing
Airflow
(CFM)
WPD
(ft.) 0.3 1.0 2.1 3.7 5.6 0.2 0.6 1.5 2.8 4.3
A, B, C 16000 7.57 9.02 9.59 9.90 10.10 5.50 6.54 7.05 7.29 7.42
20000 8.26 10.08 10.84 11.25 11.52 6.02 7.34 8.01 8.33 8.50
23000 8.67 10.75 11.64 12.13 12.44 6.34 7.85 8.63 9.01 9.21
28000 9.21 11.69 12.78 13.39 13.79 6.77 8.56 9.52 9.99 10.25
33000 9.65 12.46 13.74 14.47 14.94 7.11 9.15 10.28 10.84 11.14
38000 10.00 13.11 14.56 15.40 15.94 7.38 9.65 10.93 11.58 11.93
43000 10.29 13.67 15.28 16.21 16.83 7.61 10.08 11.50 12.22 12.62
45000 10.39 13.87 15.54 16.51 17.15 7.69 10.23 11.71 12.46 12.88
Notes:
1. Capacities are expressed as MBH (Q) per degree (F) of initial temperature difference (ITD) between the entering steam temperature (F)
and the entering (return) air temperature (F) to the coil.
2. WPD is waterside pressure drop in feet of water
3. Hot water capacity is at 180°F entering water temperature and 65°F entering air temperature
4. Maximum entering water temperature is 200°F.
5. Capacities do not include fan heat.
Table 31 Steam Coil Heating Capacities (Q/ITD)
Casing Airflow(CFM)
High
Cap
Low
Cap
A, B, C 16000 7.33 4.99
20000 8.17 5.67
23000 8.73 6.10
28000 9.55 6.71
33000 10.27 7.20
38000 10.92 7.61
43000 11.52 7.95
45000 11.74 8.07
Notes:
1. Capacities are expressed as MBH (Q) per degree (F) of initial temperature difference (ITD)
between the entering steam temperature (F) and the entering (return) air temperature (F) to
the coil.
2. Steam coil capacity is at 15 psig and 65°F entering air temperature.
3. Capacities are expressed as MBH (Q) per degree (F) of initial temperature difference (ITD)
between the entering steam temperature (F) and the entering (return) air temperature (F) to
the coil.
4. The maximum recommended steam pressure is 35 psig.
5. Capacities do not include fan heat.
Table 32 Properties of Steam
Steam Pressure (psig) 2 5 10 15 20 25 30 40 50
Temperature of Steam (F) 219 227 239 250 259 267 274 287 298