Selas Heat Technology Co. LLC (Selas) completed the purchase of Webster Engineering & Manufacturing Co. LLC (Webster) of Winfield, Kan. Webster is a leading designer, manufacturer and marketer of custom and semi-custom multi-fuel boiler burners for the commercial, institutional and industrial markets. The company’s burners combine advanced control technology with proven combustion performance to provide the heat source for the transformation of water to potable hot water, hot water for heating, and steam for heating and process applications. Webster’s most recent innovation, the patented Temp-A-Trim® system, senses combustion air temperature and automatically controls the fan speed to create a constant airflow mass for combustion, thereby maintaining optimum fuel/air ratios to  enable maximum burner efficiency.