When you have appealed as far as possible, you can consider appealing to the U.S. Supreme Court. If you decide to appeal to the Supreme Court at this stage, the next step is to prepare a petition for certiorari. This is the document the Court will read in order to decide whether to hear a case.
Commercial applications have an even broader spectrum of change-out frequencies. Air filters in restaurants are commonly changed every 4 to 8 weeks depending on the customer traffic and filter type.. Retail chains, strip malls, and other small businesses vary, but usually are in need of a change every 12 weeks.
1. Clean or upgrade your air filters. If your house is heated and/or cooled by a central system, you can change the filters as a means of controlling dust levels in your air. Dust will continue to build up in your home, but a quality filter can slow down the rate of dust accumulation.