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What Size Gas Line for 60000 BTU Furnace? (Explained)

Gas line size & length will vary from appliance to appliance since all have different requirements for gas lines.

You may use the regular gas line size if you work with average or regular home appliances. If you go for an industry-based gas appliance, it will need a bigger gas line.

You must consider three must-follow rules to get the perfect size gas line for your home appliances. That appliance’s power will come first, then the required gas line. Lastly, the extra length needs to be added.

Gas line size for 60000 BTU furnace

½ inch gas line is perfect for a 60000 BTU furnace since it is considered the regular powerful home appliance. You can use a half-inch gas line for every home appliance unless it gives you extra power. If your furnace is more than 60000 btu, ½ inch gas line will still be enough for it.

BTU or British Thermal Unit is a unit measurement of your home appliances. You may also consider it the best energy measurement system used worldwide for its global acceptance. You may also get your furnace or other appliances requirements to get the perfect gas line.

When you have planned to use a different powered furnace or a highly powerful appliance, you must ensure that you use the right size gas line.

If you use the below standard gas line or very small gas line, it will fail to provide enough power. You cannot think of using a ¾ or ⅜ inch gas line for your 60000 BTU furnace or other home appliances.

There is an international chart that you can follow to find out the safest gas line for your 60000 furnaces. The authorities suggest safely using a ½-inch gas line that will be perfect for 100000 BTU furnaces or other appliances. It is the required gas line size to use against your furnace.

Sometimes, the furnace may be around 38000 btu, and you can use the ¾-inch gas pipe for the same furnace.

However, you should not use less or smaller gas pipes unless you have fewer btu or powerful home appliances. Otherwise, you can use the half-inch gas pipe for most home appliances.

60000 btu is a standard for most house appliances; therefore, you should always try to use a half-inch gas line that will provide or handle the gas pressure perfectly and better than any other gas line.

If your gas line is small, but you have large & powerful appliances, it will require an extensive gas line.

When you have small home appliances that are less than 40 thousand BTU, you should stick to using a ¾ or ⅜ inch gas line that can handle your gas pressure.

You should not use less than ¾ inch gas line for your house appliances since it will be the safest option unless your appliances come up with high power.

Apart from the gas line size, you should also consider the gas line materials since the material will vary from pipe to pipe.

Gas lines should be flexible and should have a flexible structure to maintain the inside power. PVC gas line would be your best choice since it will ensure that you can use it for a long time.

Another tip for using a gas line for your home appliance or furnace is to use some extra length of your gas line.

Let’s say your desired gas line length is 30 feet; you should add some extra length and try to make it around 35 feet. It will be a flexible choice that you can use everywhere.

How many BTU can a 3/4 gas line carry?

A ¾ gas line can carry 750 and 1887 BTU per foot round for natural gas and LP gas, respectively. One thousand British thermal units (BTUs) equal one cubic foot of natural gas.

The total length of the pipe must incorporate additional space for all the fittings. Include roughly 5 feet of pipe for each fitting.

For instance, a pipe with a diameter of one inch and a length of thirty feet would be required for a burner that demands 374,000 BTU. Therefore, a gas line with a 3/4 inch diameter may carry 750 BTU.

To reiterate, one cubic foot of LP gas equals 2516 BTUs. For a pipe run that is 20 feet long and requires 787,000 BTU, you will need a pipe that is 1 inch in diameter. In the case of LP, a 3/4 gas line can transport 1887 BTU.

The farther you run a gas line, the fewer BTUs you will have available at the end of the line. Keep in mind that the amount of BTUs your system produces will decrease even further if you add fittings and elbows. On average, you will need to shorten the length by 5 feet for every fitting.

2 factors that affect the gas line size for the 60000 BTU furnace

The gas line size for the 60000 btu furnace is affected by a number of factors, including the maximum demand for gas, the allowable loss in pressure from the point of delivery to the gas appliance, the length of the gas piping and the number of fittings that are required, the specific gravity of the gas and diversity factors, and the length of the gas piping.

Gas Pressure:

When determining the size of piping for gas distribution, the first step is to estimate the gas pressure at the point of delivery. To verify the gas pressure at the meter quickly, you should call the gas supplier.

The gas pressure supplied to the systems of residential buildings is no greater than half a pound per square inch (psi). This is more than sufficient given that most gas appliances only require a pressure of 1/4 pounds per square inch (psi).

High pressure, defined as anything above 2 pounds per square inch, is often reserved for use in commercial and industrial settings. The provider puts a warning mark on the meter to indicate high pressure.


When the footage is calculated, that specific distance will be the sole one utilized for determining the size of the piping in that system.

If you had 44 feet, for instance, you would move on to the next column, which was 50 feet and use the numbers provided under that column.

What happens if your gas line is too small?

If your gas line is too small, it is most likely that the burner and the pilot might go out. Besides, you cannot have enough hot water until and unless you relit it. If the gas line were large enough, the burner and the pilot would stay lit.

An indirect heater does not receive “free heat,” and its performance will fall short of expectations if the boiler is insufficient to meet the requirements for both heating and the production of hot water.

The pipe is not large enough to transport the complete Btu input. Size reductions or fitting constraints can result in insufficient gas volume or an unacceptable drop in gas pressure.

This frequently occurs on the branches of piping systems. It is necessary to consider and accurately calculate the length of the branch in addition to any fittings.

How do you calculate a gas line for 60000 btu furnace?

Using the following tips, you can calculate a gas line for 60000 btu furnace, but I will explain the best way. Let’s follow some simple rules and calculate the suitable gas line size.

Branch Length:

This should be performed to ensure the highest degree of precision.

When determining the pipe size needed for each branch piping segment, it is essential to consider both the segment’s load and the total distance the pipe must travel from the origin of the supply to the branch’s farthest outlet.


Cubic feet per hour is the unit of measurement for the amount of gas consumed by your gas range (cfh). Simply dividing the BTUs by 1,000 will get you the cfh equivalent of the input rate measured in BTUs.

If your gas stove consumes 60,000 BTUs, the equivalent in cubic feet per hour would be 60 cfh.

You can use this information in conjunction with a gas piping table to establish the diameter of the gas pipe that will be necessary for the secure and effective operation of your appliance; however, you will also need to know the length of the pipe.

Please find out how long a pipe must be to connect the gas meter to the gas appliance in your home that is the farthest away from it.

Final Thoughts

½ inch gas line is perfect for a 60000 furnace, but you should use a lengthy gas line to maintain the flexibility. If your gas line is ¾ or ⅜ inch, you should replace it with a half-inch gas line to ensure the best flexible gas pressure maintenance for your furnace to maintain safety standards.