Briggs & Stratton 01938-0 Installation And Start-Up Manual page 16

Bri_s & Stratton Power Products Home Generator
Installation Manual
Fuel Comparison Chart
Physical Properties
Normal Atmospheric State
Boiling Point (in °F):
Initial
End
Heating Value:
BTU per gallon (Net LHV*)
BTU per Gallon (Gross *_*)
Cubic Feet (Gas)
Density***
Weight t
Octane Number:
Research
Motor
Butane
Gas
32
32
94,670
102,032
3,264
31.26
4.81
Propane
Gas
-44
-44
83,340
91,547
2,516
36.39
4.24
Natural Gas
Gas
-259
-259
63,310
1,000
57.75
2.65
94 II0+ II0+
90 97
LHV (Low HeatValue) is the more realistic rating.
** Gross HeatValue does not consider heat lost in the form of water during combustion.
*** Density is given in "Cubic Feet of Gas per Gallon of Liquid".
Weight is given in "Pounds per Gallon of Liquid".
Size of Propane Tank Required at Various Temperatures When Kept at Least
Half Full
Given the gas withdrawal rate and the lowest average winter temperature, an installer can specify the required LP storage
tank size:
Withdrawal Rate 32°F 20°F I 0°F 0°F - I 0°F -30°F -40°F
50 CFH 115 115 115 250 250 400 600
100 CFH 250 250 250 400 500 1000 1500
150 CFH 300 400 500 500 1000 1500 2500
200 CFH 400 500 750 1000 1200 2000 2500
300 CFH 750 1000 1500 2000 2500 4000 5000
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