When it comes to furnace filters, the general rule of thumb for many HVAC professionals is “the cheaper the better”. Basic fiberglass filters are just as capable of blocking large particles from entering the furnace as pleated filters. However, more expensive filters, such as pleated residential filters, can filter out dust mites, pollen, mold and pet dander, and even bacteria, making them worthwhile for people with severe allergies. HEPA filters filter bacteria and viruses and are worth the extra money for people with respiratory conditions such as emphysema.
Household HVAC air filters are rated based on their MERV rating, with most household filters between 1 and 13 (more than 13 are for HEPA filters). Fiberglass filters don't capture as much, so they're less likely to create enough blockage that will overwork and damage the system. On the other hand, pleated air filters have more surface area and can capture more particles, but they need to be changed more frequently than their non-pleated counterparts. When deciding which type of filter is best for your home, consider how many people live in your home and if anyone has allergies or asthma.
Also consider how long your air filter will last. You'll pay more for a washable air filter because it should last for years instead of months. While it's a good idea in theory, it has multiple problems such as lower MERV ratings, frequent maintenance requirements, and the potential to attract mold to your air unit. It's important to remember that any air filter will filter out particles from the air before it flows throughout the HVAC system.
Air conditioning filters filter many different particles out of the air before it flows through the HVAC unit blower and into your home. However, if you opt for a washable air filter, make sure you allow it to dry completely before replacing it. In conclusion, more expensive air filters are generally more effective than cheaper ones. However, whether you opt for fiberglass or decide to opt for pleating, the most important thing you can do is change filters often.
This will ensure that your home is safe and free from any kind of danger.