Temp-A-Trim is designed to deliver fuel savings of up to 3 percent and electrical savings of up to 30 percent, says its manufacturer. The system works by precisely correcting for air density as the combustion air temperature changes to optimize combustion efficiency automatically. A built-in variable frequency drive (VFD) adjusts the fan speed based on incoming air temperature to create a constant airflow mass for combustion, ensuring that the burner is always operating at maximum efficiency.

Webster Combustion Technology LLC, A Selas Heat Technology Co.