The BAPF40-U is the correct replacement filter for the following air purifier models:
The Bionaire BAPF40-U HEPA Air Purifier Filter is a replacement air purifier filter that is compatible with several models from Bionaire and with the Holmes HAP1200 HEPA Air Purifier. The Bionaire PERMAtech HEPA-type filter reduces dust, pollen, mold spores, and pet dander from the household air that passes through it. This HEPA filter will improve the overall indoor air quality of your home and alleviate respiratory issues caused by airborne particulates. With regular maintenance, you will not need to replace this air filter unless the filter experiences damage.
Bionaire BAPF40-U HEPA Air Purifier Filter specifications: