I feel secure knowing the furnace is operating in tiptop condition and appreciate Trey taking the time and patience to show me each step, explaining how and why the steps in the tuneup were so important. He also answered questions about the thermostat I had for a long time, helping to make the system run even more efficiently. I felt fortunate to have a top notch Lennox tech assure my furnace was safe, giving me peace of mind. Thank you.