I have replaced my old muffler with this model with the same specifications. The old fan worked for about 8 years before the engine started to run poorly and overheat. I first spoke to an Air Supply of the Future tech support representative about my old unit and was told I could send the old one in for service. Since the total shipping cost was about $80, I decided to just buy a new one. If you're replacing your old muffler blower and don't necessarily want to buy a new unit, you can rebuild it. It works like this: You pay shipping there and add on the $60 you put in the box, which is paid for service, parts, and return shipping. If this is the route you want to take, visit the website and call first for more information. These blowers are very powerful and much quieter than a pool pump.