I installed this unit in Nov. 2012, and the unit if functioning well for me. I have it installed in my basement. In adding to a previous review regarding the discharge pipe, at the time of my installation i was told a 1" sweep or long elbow was not available in regular white schedule 40 pvc. by a Home Depot salesperson. I had to go to a 1-1/2" sweep elbow and use 1-1/2" to 1" reducers. Not being happy with this configuration using reducers which cause turbulance, i was at a Ace Hardware telling the salesman of my situation. He told me to use schedule 40 gray electrical conduit, which is made in a sweep or long elbow, and the same material. I removed the 1-1/2" and replaced it with the 1" gray electrical pvc sweep elbow, coupling it with regular white pvc couplings. The operation is much quieter and smoother now. I also added a pvc shutoff valve to the line above the elbow for easier servicing. No one seems to know why a sweep elbow in 1" white pvc is not made. Hope this information will help someone making a similar installation.