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505429-JTG-F-1010
64 Johnson Controls Unitary Products
Air Handling and Hot Water Coil Accessory Heating Capacity
Air Handling and Steam Coil Accessory Heating Capacity
NOTE: Steam Rate = (lbs/Hr.) = 1.025 x MBH
J25NC / 1HW0406
1
1
These capacities do not include any blower motor heat.
NOTE: Temperature Water Drop (ºF) = (2 X MBH) / GPM.
UNIT
MODEL
HOT WATER
COIL MODEL
GPM CFM
CAPACITY (MBH)
ENTERING WATER TEMPERATURE MINUS ENTRY AIR TEMPERATURE °F.
70 90 110 130 150
J25NC 1HW0406 50
6,000 204 263 325 384 443
8,000 236 304 372 440 508
10,000 265 341 416 492 568
12,000 291 374 457 540 623
Hot Water Coil Capacity Correction And Pressure Drop Vs GPM
1
1
For pressure drop in feet (water), multiply these values by 2.31.
HOT WATER COIL MODEL GPM
PRESSURE DROP
PSI
CAPACITY CORRECTION
FACTOR
1HW0406
25 0.4 0.79
50 1.0 1.00
75 1.8 1.04
100 3.4 1.07
J25NC / 1NF0454
UNIT
MODEL
STEAM COIL
MODEL
CAPACITY (MBH) @ 2 PSIG
1
1
These capacities do not include any blower motor heat.
CFM DRY BULB TEMPERATURE OF AIR ENTERING COIL (°F)
10 30 50 70
J25NC 1NF0454
6,000 471 424 380 330
8,000 535 483 432 380
10,000 592 535 478 422
12,000 642 580 518 456
Steam Coil Capacity Correction Factors For High Steam Pressure
STEAM PRESSURE (PSIG) 5101520 25
CAPACITY CORRECTION FACTOR 1.05 1.12 1.19 1.25 1.30