"To whom it may concern: I would like to commend your technician Lance. He was recently here to check my furnace for winter. He has always been very professional, polite and neat. He makes sure that I understand if there is a problem and gives me options for correcting or replacing the equipment. Your company is fortunate to have such a competent employee. It is a pleasure to do business with him. P.S. Please be sure to compliment him for me."
Barbara - Clintonville