Three years ago this company told me I needed a new furnace and used techniques to scare me saying I was at a high risk of a carbon monoxide leak. I immediately contacted another company for a second opinion, and was told my furnace did not need replacement. As an added precaution, I purchased a carbon monoxide detector. I ended spending money for the detector and the second opinion - because of their lies. Three years later, my furnace still works great and the detector shows "0" carbon monoxide in my home. I only looked them up today to see if they were still in business... be careful people!