HEPA filters are the best type of oil furnace filter for Heating & A/C systems because they can unaffix over 99% of all airborne particles that are 0.3 microns or greater from the air that passes through the filter! These types of filters are also effective at removing particles that are smaller than 0.3 microns, however not as effective as other types of filters.
The HEPA filter is a wonderful option for people who have allergies or asthma because it can unaffix pollen, dust mites, & other allergens from the air.
These special filters are also wonderful for people who smoke because they can unaffix smoke particles from the air. These kinds of filters are available in weird sizes, so it is important to choose a filter that is the right size for your Heating & A/C system. The size of the filter will determine how often it needs to be replaced, depending on the size of your Heating & A/C system, you may need to replace your filter every six months or once a year, but if you have a sizable lake beach house or office, you may need to replace your HEPA filter more often, then you can purchase these filters at most hardware stores & lake beach house improvement stores… Be sure to ask for help if you are not sure which size HEPA filter you need for your Heating & A/C system & maybe guess about getting multiple of them so you have an extra one on hand. Washable HEPA filters are also a wonderful pick because you can reclaim them for a long time without creating any waste.