The Problem With Washable Air Filters

The importance of going green has transformed the way many homes function today. There are trash compactors, bamboo floors, and rain barrels. Yet your furnace and HVAC system also offer big opportunities for being more energy efficient.

Air filters trap particles like pollen, tobacco smoke, dust, mildew, and mold. They also keep your heating and air conditioning units working effectively and efficiently. Washable air filters are one way homeowners are trying to go green, but is it the best way?

The Theory Behind Washable Filters

In theory, an air filter that you simply rinse off and stick back in your furnace can save you time and money. There's no need to buy disposable air filters and furnace filters. A washable filter, because of its plastic-like material, might last up to five years, whereas a household might go through 60 or more non-washable filters in that time.

There are various eco-friendly air filters on the market, many made from recycled and recyclable materials. These filters often claim to perform as well or better than disposable ones, and many homeowners trust the Energy Star rating on the packaging.

Does Washing Really Get an Air Filter Clean?

Unless you have a washable filter, you should never wash or vacuum a disposable air filter. Whole-house filters, air filters, and furnace filters are designed to capture debris, but no matter how clean a washable filter may appear, there is no guarantee it is completely free of debris. Washing or vacuuming a disposable filter can also damage the material or bend the frame, making the filter ineffective and putting your HVAC system at risk.

For furnace filters meant to be washed, the problem is twofold:

• Residual Debris: Even after thorough washing, tiny particles of debris may remain, reducing effectiveness.
• Moisture Retention: Homeowners often reinstall the filter before it is completely dry, leading to mold growth.

Imagine putting a wet paper towel outside—it would catch airborne particles. The same happens when you place a damp washable air filter back in your furnace. These filters tend to attract mold, yet one of the main purposes of an air filter is to remove mold and mildew spores.

Washable vs. Disposable Air Filters

• Maintenance: Washable filters require frequent cleaning to remain effective, while disposable filters are easier to replace with minimal effort.
• Effectiveness: Disposable filters trap smaller particles more efficiently, including pet dander, bacteria, viruses, and smoke. Washable filters primarily block larger particles like dust and may not filter microscopic contaminants effectively.
• MERV Rating: Washable filters typically have a MERV rating of 1 to 4, much lower than high-efficiency filters that can reach MERV 16.
• Cost: Washable filters have a higher upfront cost but last longer, while disposable filters are more affordable per unit but require regular replacement.

Contact AirFilterBuy today to learn more about washable and disposable furnace filters. Our knowledgeable customer service representatives can help you choose the best product to improve energy efficiency while keeping your indoor air clean and healthy.