I am really ticked off with this guy .... he came repeatedly over a period of years to fix a furnace problem. We paid a lot.. then he said we needed a new furnance installed, for about $3000. Finally, I started taking the furnace apart myself to find the problem. Turns out, it was just a screw adjustment on a control switch that operated the fan.... I just tightened the screw and the problem has never come back. AVOID THIS GUY LIKE THE PLAGUE!