The answer to reusable versus disposable is based on how meticulous you are. It's vital to change your air filter regularly. If you opt for a reusable one, you will have to clean it based on the manufacturer's suggestion. Once clean, it can be reinstalled and used again. This requires an investment of time. On the other hand, the disposable option takes about a minute to remove the old air filter and slide the new one in. Very little time is required to maintain your HVAC filter this way. There is more of an initial cost upfront with a reusable air filter, but you'll buy fewer of them over time. Many people who are concerned with the environment purchase the reusable option. However, if you're not going to commit to properly maintaining it, your system will work harder and place more strain on the environment anyway.