What Size Gas Line For 24kw Generac Generator

Would you like to install a 24kw Generac generator but are unsure about its gas line size?

This article will provide you with a comprehensive guide that offers practical insights and step-by-step instructions.

Check out the key factors, best practices, and essential considerations to ensure your 24kw Generac generator runs smoothly and reliably.

what size gas line for a 24kw generac generator?

For a 24kW Generac generator, a 1-inch gas line is recommended for lengths up to 80 feet, and a 1.25-inch gas line is recommended for lengths up to 200 feet. Using a gas line that is too small can cause an insufficient gas supply to the generator, which can damage the engine.

24kW Generac Generator Gas Line Size Chart:

Length of Gas Line	Recommended Size
Up to 80 feet	1 inch
Up to 200 feet	1.25 inch

Understanding Gas Line Requirements

Generator Fuel Consumption

Before determining the gas line size, it’s essential to understand your generator’s fuel consumption.

Generac’s 24kw generator consumes around 3.4 gallons per hour at 50% load. This data serves as a starting point for calculating the appropriate gas line diameter.

Pressure Drop Considerations

Pressure drop is a critical factor to consider when sizing the gas line. A pressure drop can lead to decreased efficiency and even generator malfunction.

The distance between your gas supply source and the generator location will impact the pressure drop.

Longer distances may require larger gas lines to compensate for pressure loss.

Pipe Sizing Formula

To calculate the gas line size, use the following formula:

Gas Line Size (in inches) = (Generator Fuel Consumption in BTU/hour) / (Heating Value of Gas) / (Pressure Drop in Inches of Water Column x 0.00008)

Factors to Consider When Determining Gas Line Size

Determining the correct gas line size for your appliance is crucial to ensure its efficient and safe operation. Here are some factors to consider when determining gas line size:

Appliance BTU rating

The appliance’s BTU rating determines how much gas it requires to operate efficiently. The higher the BTU rating, the larger the gas line size required.

Gas pressure

The gas pressure required for an appliance varies depending on the manufacturer’s specifications.

It’s essential to ensure that the gas pressure is appropriate for the appliance, as inadequate gas pressure can result in inefficient operation, while excessive pressure can cause safety hazards.

Gas line length

The longer the gas line, the larger the gas line size required. The friction caused by gas flowing through the pipe can cause pressure loss, reducing the gas pressure at the appliance.

Altitude

Altitude affects gas pressure, and therefore, it’s an important factor to consider when determining gas line size.

At higher altitudes, gas pressure decreases, and larger gas line sizes are required to compensate for this pressure loss.

Gas type

The type of gas being used also affects gas line size. Natural gas requires larger gas line sizes than propane gas, as it has a lower pressure.

Number of appliances

The number of appliances being served by the gas line also affects gas line size.

Multiple appliances operating simultaneously require larger gas line sizes to ensure adequate gas pressure for each appliance.

Calculating Gas Line Size

Step 1: Determine Fuel Consumption

Let’s start by finding the generator’s fuel consumption. For a 24kw Generac generator running at 50% load, it consumes approximately 3.4 gallons per hour.

Step 2: Obtain Heating Value of Gas

The heating value of natural gas varies, but it typically ranges between 900 and 1100 BTU per cubic foot (BTU/ft³). Check with your gas supplier to get the specific heating value.

Step 3: Assess Pressure Drop

Measure the distance between the gas source and the generator’s location. Consult the manufacturer’s specifications to find the acceptable pressure drop limit.

For example, if the acceptable pressure drop is 0.5 inches of water column (WC), and your measured pressure drop is 0.3 inches WC, you will use 0.5 inches WC for the calculation.

Step 4: Calculate Gas Line Size

Now, let’s put it all together:

Generator Fuel Consumption = 3.4 gallons per hour (converted to BTU/hour)

Heating Value of Gas = 1000 BTU/ft³ (sample value)

Pressure Drop = 0.5 inches WC

Gas Line Size (in inches) = (3.4 gallons per hour x 140,000 BTU/gallon) / (1000 BTU/ft³) / (0.5 inches WC x 0.00008) ≈ 1 inch

In this example, a 1-inch gas line is recommended for your 24kw Generac generator to ensure optimal performance.

Common Gas Line Sizing Mistakes to Avoid

Here are some common gas line sizing mistakes to avoid:

Using Improper Gas Pipe Materials

Using the wrong type of gas pipe material is a common mistake when sizing gas lines.

The material of the gas pipe can significantly impact the flow of gas and pressure drop along the line.

Only approved gas pipe materials such as copper, steel, or polyethylene should be used for gas line installation.

Incorrect Gas Line Sizing

Incorrect gas line sizing is a common mistake that can lead to gas flow issues and pressure drops.

The gas line size should be calculated based on the gas demand, pipe length, and gas pressure requirements.

Using an incorrect gas line size can lead to reduced gas flow, resulting in poor appliance performance and possible safety hazards.

Ignoring Gas Pressure Requirements

Ignoring gas pressure requirements is a common mistake when sizing gas lines. Different gas appliances require different gas pressures for proper operation.

Ignoring the gas pressure requirements can lead to appliance malfunctions, safety hazards, and decreased appliance lifespan.

Overlooking Altitude Differences

Overlooking altitude differences is another common mistake when sizing gas lines.

As altitude increases, the air becomes thinner, leading to reduced gas pressure and flow rates.

Failure to account for altitude differences when sizing gas lines can result in safety hazards, appliance malfunctions, and reduced appliance lifespan.

Neglecting Safety Concerns

Neglecting safety concerns is a common mistake when sizing gas lines.

Proper gas line sizing is critical for safe appliance operation and preventing gas leaks that can lead to safety hazards such as gas explosions and fires.

Gas line installation should be carried out by licensed professionals who follow safety regulations.

Not Considering Future Appliance Additions

Not considering future appliance additions is a common mistake when sizing gas lines.

Adding new gas appliances to an existing gas line without resizing the line can lead to reduced gas flow, pressure drops, and safety hazards.

It is essential to size gas lines with future appliance additions in mind.

Tips for Installing Gas Line for 24KW Generac Generator

Installing a gas line for a 24KW Generac generator requires careful planning and execution to ensure efficient and safe operation of the generator.

Here are some tips to follow when installing a gas line for a 24KW Generac generator:

Determine Gas Demand

The first step in installing a gas line for a 24KW Generac generator is to determine the gas demand of the generator.

The gas demand can be found in the generator’s manual and is usually measured in cubic feet per hour (CFH).

The gas line should be sized to meet the generator’s gas demand.

Select Gas Pipe Material

The gas pipe material is an essential consideration when installing a gas line.

Only approved gas pipe materials such as copper, steel, or polyethylene should be used for gas line installation.

The gas pipe material should be selected based on factors such as gas pressure, environmental conditions, and corrosion resistance.

Calculate Gas Line Size

The gas line size should be calculated based on the gas demand, pipe length, and gas pressure requirements.

The gas line size should be selected to ensure that the generator receives the required gas flow and pressure for efficient operation.

Install Gas Line

The gas line should be installed by a licensed professional who follows safety regulations and guidelines.

The gas line should be buried at a depth of at least 18 inches to protect it from damage and should be properly marked with warning signs.

Test Gas Line

Once the gas line is installed, it should be tested for leaks and proper gas flow.

A licensed professional should perform the gas line testing using specialized equipment.

Install Gas Regulator and Shutoff Valve

The gas regulator and shutoff valve are essential components of the gas line installation.

The gas regulator ensures the generator receives the correct gas pressure, while the shutoff valve allows the gas supply to be shut off in case of an emergency.

Connect Gas Line to Generator

The gas line should be connected to the generator using a flexible gas connector or a rigid pipe.

The gas line should be properly secured and supported to prevent damage or leaks.

FAQs on right Size Gas Line For 24kw Generac Generator

Final Words

Choosing the right gas line size for your 24kw Generac generator is crucial for its reliable and efficient operation.

Follow best practices, evaluate fuel consumption, and assess pressure drop to ensure seamless backup power.

Remember to consult professionals and adhere to local regulations for a safe and successful installation.

You’re now equipped to make an informed decision and enjoy uninterrupted power during outages.