This is a review for 3D in Wichita, even if my location shows up as different. A tech came out to service my furnace. He told me there was a carbon monoxide leak, that the whole furnace needed to be replaced, and that it would cost north of $2,000. I called my warranty company and paid $75 for their tech to come out - guess what, no carbon monoxide. But wait, was my warranty company trying to save themselves money? At the risk of my life? Seemed questionable, but I got a THIRD opinion and no carbon monoxide. Bought a moderately high-tech personal carbon monoxide detector and still nothing. Smells like a scam. Guy didn't realize I had a warranty company. Just saw a woman and a freshly purchased home and thought he could make some extra cash. read more