Our new Daikin two stage furnace was installed in August. The installation went very well. We were most satisfied with the quality of the install. We, however, find our new two stage furnace to be much noisier than our old one. The external exhaust is also very noisy. The technician who came today, Sullly, was very experienced and knowledgeable. He explained to us that two stage furnaces are by definition noisy (which I had learned by searching the internet) but he was able to reduce the blower fan a bit to reduce the noise somewhat. He was very personable and people friendly. We were very happy with our service visit. It was a warranty visit so no charge.