Rheem GEN12S Manual de Instalação descarregar pdf (Página 13)

Fuel Comparison Chart

The fuel comparison chart shown below is provided for your

reference.

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. The table below provides guidance on tank size

selection.

Required Propane Tank Size (Lowest Average Winter Temperature), in Gallons

Fuel Comparison Chart

Withdrawal Rate 32°F 20°F 10°F 0°F -10°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

Physical Properties Propane Natural Gas

Normal Atmospheric State Gas Gas

Boiling Point (in °F):

Initial -44 -259

End -44 -259

Heating Value:

BTU per gallon (Net LHV*) 83,340 63,310

BTU per Gallon (Gross**) 91,547

Cubic Feet (Gas) 2,500 1,000

Density*** 36.39 57.75

Weight† 4.24 2.65

Octane Number:

Research 110+ 110+

Motor 97

*LHV (Low Heat Value) is the more realistic rating.

**Gross Heat Value 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".

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Rheem GEN12S Manual de Instalação Página 13