I just installed this unit, so I cannot speak to its durability, but it is an all-metal caged unit, and it seems very well built. I installed it over my walk-through door between my house and garage to cut down on the flies that come in. My wife and I feed our dogs in the garage so flies can get bad in the summer.A couple of things that should be noted:1) You need an outlet somewhere within a reasonable reach for this device to work for you. I have a contruction grade extension cord running along my garage ceiling to an outlet that I don't otherwise use. Do NOT use a household cord! This unit is likely to pull some amps, especially on initial startup.2) Don't expect a silent device. This thing is blasting over 2k CFM. It WILL make some noise, but this thing is NOT overly noisy. It's exactly the db that you should expect for what it is, but you can cut down on the noise by securely mounting it. Any additional vibration from a loose mounting will increase the noise level.3) The wires for the door switch are too short and DO NOT drape them down behind the unit like the instructions seem to show. The reason is that vibrations from the unit will probably eventually wear through the wire insulation and cause an electrical failure in the switch wiring. You need to add some additional wire of the appropriate gauge and run them around the unit and to the door switch mounting point. I didn't check to see if this is a low voltage trigger, which it probably is, but just in case I made sure that I used wire that was the same gauge and type as the pigtail on the unit. I used wire nuts and electrical tape to attach my additional wire.4) They don't include any mounting screws so you need to use some kind of decently heavy screw with an aggressive thread that can securely bite into your wall studs to make sure that the screws won't pull out and drop this unit. Remember, it WILL vibrate to some degree, and it will stress test your mounting job.As I said, I don't know how well it will hold up, so I may come back later if I have issues, but if I don't then that means so far, so good.