Furnace Filters: A Guide to Different Types

When it comes to keeping your home's air clean and free from dust, dirt, and other airborne particles, furnace filters are an essential part of any heating system. But with so many different types of filters on the market, it can be hard to know which one is right for you. In this article, we'll explore the various types of furnace filters and what they do.

Pleated Filters

Pleated filters are the most common type of filter available. They are made from a thin layer of synthetic material that has been pleated to create a larger surface area for trapping more particles than other types. Pleated filters are usually rated by their MERV (Minimum Efficiency Reporting Value) rating which ranges from 1-16; the higher the MERV rating, the more efficient it will be at trapping particles.

Fiberglass Filters

Fiberglass filters consist of a thin layer of spun glass fibers held together by an adhesive. These are usually very affordable but don't provide much protection against airborne particles; they should be changed every month or two as they become clogged quickly.

Electrostatic Filters

Electrostatic filters use electricity to create an electrostatic charge that attracts and traps particles in the air. These can be washed and reused multiple times before needing replacement; however, they tend to be more expensive than other types but can offer effective protection against airborne particles.

HEPA Filters

High-efficiency particulate air (HEPA) filters have been designed to trap up to 99.97% of all airborne particles that pass through them. To meet US Department of Energy standards for true HEPA certification, these must meet very strict requirements - making them pricier than other options - but offering superior protection against airborne pollutants.

Carbon Filters

Carbon filters contain activated carbon which helps remove odors and gaseous pollutants from the air as well as reducing levels of smoke and VOCs (volatile organic compounds). While these don't offer much in terms of particle protection, they can help improve indoor air quality.

Conclusion

When choosing a furnace filter, it's important to consider your needs, budget, and desired level of protection. Pleated filters are generally best for most homeowners, while HEPA or carbon may be better suited if you need higher levels or want odor/gas reduction.