The SEAPU module replacements can be ordered in several ways. They come in a package of four modules because all four modules are to be replaced at the same time. Typically this will occur at a minimum of annually in order to provide adequate protection to most environments with typical ambient contaminant concentrations, but it is not uncommon in high concentration areas to have 6 month change-outs. Do not risk your valuable equipment by delaying a change-out.
HBOS SEAPU Particulate Filters - Set of Six (MERV 8)
The SEAPU particulate custom filters can be ordered as stand-alone sets, They come in a package of six filters. These should be changed monthly in typical applications. You may also find that you only need to change the post-filter every other time, as it is closest to the clean purified air and will not foul as quickly as the pre-filter which is in the first stage (closest to the contaminated air.)
The SEAPU Replacement Kit contains everything you need for a complete replacement cycle on the SEAPUs. If you need a complete change-out kit, then this is the product for you. It contains two (2) particulate MERV8 custom filters and four (4) impregnated specialty carbon extruded refill modules. Simply remove & discard the existing media and replace with new kit contents, noting the install date for improved media control.