Unused 22MM BTU Heatec Ultra-Low NOx Vertical Natural Gas Fired Heater Package. Model 16010-40. Coil Duty 20,380,687 Btu/hr. Economizer Duty 1,759,313 Btu/hr. Heater Duty 22,140,000 Btu/hr. Required Burner Input (HHV) 30,555,370 Btu/hr. Heater Effiiency (LHV) 80%. Maximum Tube Metal Temperaure (AICHE) 727 F. Maximum Fluid Film Temperature (AICHE)698F. Turnaround Temperature 1863F. Stack Temperature 755 F. Stack Diameter 36". Top Gap 2.625". Bottom Gap 3.625 ". Heater Thermal Fluid Pressure Drop 5.164 PSID. Heater Flue Gas Pressure Drop 0.957 in w.c. Process fluid LIQ CUS. Process Fluid Volume Flow Rate (Inlet) 1,404 gpm. Process Fluid Mass Flow Rate 339,355 lb/hr. Process Fluid Inlet Temperature 584.61F. Process Fluid Outlet Temperature 670.10F.Coil Pipe OD 4.5". Coil pipe ID 4.03". Coil Mean Diameter 105.75". Coil # of Loops is 69.75. Coil # of Flow Circuits is 4. Coilt Heating Surface is 2275 sq. ft. Coil Volume 277 gallons. Coil Presure Drop 5 PSID. 2-Pass Flue Gas Pressure Drop 0.57 in w.c. Combustion Chamber Diameter 101.25". Combustion Chamber Length 27.28'. 2nd Pass Velocity 60.41 ft/sec. Economizer # of Rows 4. Economizer Tubes/Row 6. Economizer # of Flow Circuits 6. Economizer Branch Tube Size 4. Economizer Manifold Tube Soize 8. Economizer Transverse Pitch 8". Economizer Longitudinal Pitch 6.928". Economizer Fin Height 1". Economizer Fin Spacing 5 #/in. Economizer Effective Finned Length 6'. Economizer Total Surface Area 2169.8 sq. ft. Economizer Total Volume 162.7 gallons. Economizer Fluid Pressure Drop 0.44 PSID. Economizer Flue Gas Pressure Drop 0.38 in w.c. Economizer Flue Gas Inlet Temperature 972.17F. Built 2018.