Product review (5 stars): Worth for better venting
The old one broke, this one fits and replaces it. Now that I've seen the new I'd say it is a good idea to replace every 10 years or so depending on how well you keep the old on clean. I've read that wrinkle free dryer tissues will eventually clog these filters so once a year or so I cleaned ours with dish soap still I see that the new one is much better.