Standard emissions include equipment that is powered by USEPA certified engines. These choices include gasoline and diesel-powered equipment and are not separated by emission category. If you have a specific request, please note it at the order-entry process.

The lower diesel emissions category encompasses equipment powered by Tier 4 diesel engines. Tier 4 engines comply with a set of EPA-mandated emission standards for off-highway diesel engines. Tier 4 engines have less particulate matter and nitrous oxide emissions compared to prior tier engines.

The low emissions category contains equipment powered by hybrid, propane or natural gas engines. Hybrid-powered machinery is becoming more available in the commercial construction industry. The most apparent advantages of hybrid equipment are increased fuel efficiency and lower emissions. Hybrid equipment also boasts more efficient performance as it can consistently run at the optimal speed and torque range for the task at hand. Propane- and natural gas-fueled equipment are known for burning cleaner when compared to diesel-powered equipment Using hybrid, propane or natural gas powered equipment may be a viable method to help meet sustainability goals

The zero-emissions segment comprises equipment powered by battery, electric or solar power. The equipment produces zero-emissions when being used. These machines are safe to use indoors as they emit no fumes or harmful toxins, making them a great option for reducing carbon emissions. Currently, most of the equipment powered by zero-emission powertrains are smaller, light-duty equipment like small forklifts and light construction equipment. Zero-emission equipment consumes no liquid fuel and as such, can help you to more quickly meet your sustainability goals.

• CO2 emissions from gasoline: ~8.8 kg CO2e/ gallon
• CO2 emissions from diesel: ~10.2 kg CO2e/ gallon
• CO2 emissions from 100% biodiesel: ~9.5 kg CO2e/ gallon (note only 5% to 20% can be used)
• CO2 emissions from propane: ~5.7 kg CO2e/ gallon
• CO2 emissions from natural gas: ~5.3 kg CO2e/ gallon

Source: https://www.epa.gov/climateleadership/ghg-emission-factors-hub

Electric equipment does not have emissions during operation of the equipment. However, the electricity it takes to operate and/or charge the battery does have emissions (Scope 2). These emissions are produced at electric power plants and vary based on how the electricity is produced. 

Renewable diesel is a biomass-based fuel that meets the ASTM standard for diesel fuel and can be used at 100% concentration. (Note: biodiesel is different due to the manufacturing process and cannot be used at 100%). Renewable diesel can reduce GHG emissions from between 50% to 85% as compared to petroleum diesel.

The USEPA required off-road diesel engines to get cleaner over time. To help categorize the steps, the USEPA developed different “tiers” that engine manufactures had to meet over time. Tier 0 has the most emissions and currently Tier 4 has lowest amount of emissions.