Boiler Room Units of Measure

1 Boiler Horsepower = 34.5 lb steam from & at 212 F

1 Boiler Horsepower = 33, 480 Btu/hr

1 gallon water = 8.34 pounds

1 cu ft water = 7.48 gallons

1 cu ft resin = 30,000 grains

1 grain hardness = 17.1 ppm

Psig (gauge) + 14.7 = Psia (absolute)

C = ( F-32 ) x 5/9      F = ( 9/5 x C ) + 32

Btu steam output = Btu input efficiency

1 psi = 27.7 inches water column

1 psi = 16 oz

Fuel Values

#6 oil = 150,000 Btu/gallon

#4 oil = 145,000 Btu/gallon

#2 oil = 140,000 Btu/gallon

Natural Gas = 1,000 Btu/cubic foot

1 Therm = 100,00 Btu

Coal = 12,000 Btu/pound

Wood (Dry) = 8,000 Btu/pound

1 kW electricity = 3,413 Btu

Saturated Steam