7 • 283
LP-Gas System
2004 • LaPalma
Each gallon of LP-Gas produces 91,502 BTU’s of heat. One 27 gallon
tank produces two million BTU’s. Total consumption depends on the rate of
usage by each appliance and the operating time. The stove and heating systems
typically use the most gas. With sub-freezing temperatures and high winds,
consumption by the furnace can be very high. Check the tank level often in
cold weather.
Determine Fuel Consumption:
To determine approximately how many hours an LP-Gas
appliance will operate on one gallon of LP use the following
formula:
• LP-Gas appliances are rated in Input BTU (British
Thermal Unit). The rating is usually stamped or printed
on a tag affixed to the appliance. For example: Input
rating of the appliance is 10,000 BTU’s.
• One gallon of LP-Gas produces 91,502 BTU’s.
• Divide the amount of BTU’s of one gallon of LP-Gas
(91,502) by the rating on the appliance in this example
10,000. Net continuous operation time for one gallon of
LP-Gas for this appliance would be approximately 9.2
hours.
The above formula can be useful when trying to determine the
approximate length of time a tank of LP-Gas will last. Generally, LP-Gas
appliances do not operate continuously. An example would be the typical
cycling of the furnace or water heater.
Determining how long a tank of LP-Gas will last:
• Combine the BTU input totals of all appliances and the
approximate length of time these appliances operate per day.
• Multiply the number of liquid gallons in the LP tank by 91,502.
• Divide the total of BTU’s of the LP tank by the total number of
BTU’s the appliances consume. This will equal the approximate
number of hours of operation before refueling.
WARNING: LP-Gas is highly volatile and extremely
explosive. Never use matches or open flame to test for leaks.
Use only approved LP-Gas leak testing solution to test for
leaks. Unapproved solutions can damage copper tubing and
brass fittings. Never attempt to adjust LP-Gas regulators
without the use of proper equipment. Improper LP-Gas
regulator adjustment will affect the performance of LP-Gas
operated appliances. Incorrect flame or explosion can occur.
Only qualified personnel should perform any maintenance
or repair to the LP-Gas system.
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