Danbury, CT – Preferred Utilities is proud to announce that our API gas and oil burners are now UL certified to fire up to 100% biodiesel fuel under UL 296 (Standard for Safety – Oil Burners). This certification marks a significant milestone, allowing customers in jurisdictions that require UL-listed equipment—such as New York City and Massachusetts—to take advantage of a powerful and sustainable fuel solution.

Biodiesel and renewable diesel provide an economical and environmentally friendly alternative for customers looking to reduce or eliminate fossil fuel use in their boiler rooms without high retrofit costs. To further support alternative fuel adoption, Preferred Utilities also offers pump skids and filtration units designed to keep fuel tanks clean and maintain the highest fuel quality.

UL-Listed API Burner Features

The Preferred Advanced Performance Inject-Aire (API) Low NOx Burner is engineered for superior performance and versatility. Key features include:

• UL-approved piping skid for 100% biodiesel
• Pistol-style fan for higher performance and a compact footprint
• UL-listed Direct Spark Ignition—eliminates the need for a gas ignitor
• UL-listed Fuel Oil Pilot Ignition—removes reliance on a gas ignitor for fuel oil firing
• BurnerMate Universal (BMS/CCS) for a complete combustion control package

Unmatched Fuel Flexibility & Efficiency

The API burner offers a wide range of fuel-burning capabilities, handling natural gas, LPG, digester gas, ethanol, No. 2–6 fuel oil, 100% biodiesel, 100% renewable diesel, BioResidual oil, and more. Designed for easy installation, reduced space requirements, and simplified maintenance, the API burner integrates Variable Frequency Drive (VFD) control for fan speed, reducing electrical consumption regardless of fuel type.

With this UL certification, Preferred continues to push the boundaries of fuel flexibility, efficiency, and sustainability in industrial and commercial boiler applications.