The GeneralAire 4620 is the correct replacement filter for the following air cleaner models:
The GeneralAire HF500 HEPA Filter for AC500 is a replacement air filter for the GeneralAire Model AC500 Air Cleaner. This HEPA filter is 99.7% efficient at reducing airborne particles down to 0.30 microns. This HEPA air filter, also known as the RHF562, should be replaced every one to two years in order to achieve its best performance and to have your air cleaner function at full capacity.
GeneralAire HF500 HEPA Filter for AC500 specifications: