274 | Section 7 LP-Gas System ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- ----------------- Monarch SE 2004
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 Units).
The rating is usually stamped or printed on tag affixed to the
appliance. For example: the 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 equals 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.
LP-GAS
CONSUMPTION
TYPICAL APPLIANCE BTU RATINGS
Water Heater (Atwood)
10 Gallon - 10,000 BTU
Furnace (Atwood)
35,000 BTU
Cooktop
9,000 BTU - Front
6,500 BTU - Rear
7,100 BTU - Oven
Refrigerator (Norcold)
2-Door - 1,500 BTU
4-Door - 2,200 BTU
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