What are the advantages of using a natural gas generator?
Natural gas generators offer several key benefits that make them appealing for commercial, municipal, and industrial applications. These include:
Additionally, natural gas generators start automatically during power outages (when paired with an automatic transfer switch) and can be more convenient for businesses that already have a natural gas line on the premises. For many standby power systems, the combination of cleaner exhaust, fuel availability, and reduced upkeep makes natural gas an attractive choice.
Related Questions
Why are natural gas generators better for standby power?
Natural gas generators are often better for standby power because they can run off the gas line without the need for fuel deliveries or tank refills. This continuous fuel supply means if the gas utility is functional, your standby generator can operate through extended outages. They also emit less exhaust odor and smoke.
Are natural gas generators environmentally friendly?
Natural gas generators are more environmentally friendly than diesel generators in terms of air pollution, as they produce lower levels of particulate matter and sulfur dioxide. For verified emissions, Generac and Cummins natural gas models can emit less than 2 g/kWh NOₓ and meet EPA Tier 4 or Marine Tier 3 standards. Always check supplied emissions certificates for regulatory compliance.
They also emit less CO2 per unit of electricity generated, thanks to the higher hydrogen content of natural gas. However, they are still fossil-fuel engines – while cleaner than diesel, they do emit greenhouse gases. Overall, for reducing local air pollution and meeting stricter emission regulations, natural gas is a cleaner choice.
Is natural gas cheaper than diesel for generators?
In many cases, yes. Natural gas fuel is often cheaper per energy unit than diesel fuel, which can translate to lower operating costs per hour for a generator. The exact savings depend on local fuel prices and generator efficiency. For example, running a 100-kW generator at full load might consume around 1,000 cubic feet of natural gas per hour (costing roughly $10 at $10/MCF) whereas an equivalent diesel unit might burn ~7 gallons per hour (costing $21 at $3 per gallon). Natural gas generators also avoid the logistics costs of fuel delivery. Bottom line: natural gas is typically cheaper to run, though diesel may have lower upfront cost for the generator itself in some sizes.
Are natural gas generators quieter than diesel?
Yes, natural gas generators generally run quieter than diesel generators. For example, Generac Guardian and Cummins commercial standby units typically operate at 58–68 dB(A) at 23 feet under full load, while Kohler units are rated at 69 dB(A). By contrast, commercial diesel gensets often operate at 75–90 dB(A) at equivalent loads and distances. Always compare tested ratings under similar conditions.
The combustion process in a natural gas engine is smoother, and the engines often have lower vibration and noise. Many natural gas standby units come with sound-attenuated enclosures and mufflers, resulting in noise levels that are more neighborhood-friendly. Diesel engines, by contrast, operate at higher compression and can produce that characteristic loud “diesel knock” sound. For settings where noise is a concern, natural gas units have an advantage.
