Separating Fact from Fiction: The Truth About HVAC Air Filters

One of the most persistent myths in home comfort is that expensive, high-MERV air filters are always the best choice for your heating and cooling system. This misconception costs homeowners hundreds of unnecessary dollars each year while potentially damaging their HVAC systems.

Let’s break down three common filter myths:

Myth #1: The Higher the MERV Rating, the Better

Many homeowners believe that purchasing filters with the highest MERV (Minimum Efficiency Reporting Value) rating will provide the best air quality. However, using filters with too high a MERV rating can restrict airflow, forcing your system to work harder and potentially leading to mechanical problems.

Myth #2: Change Filters Every Three Months, No Matter What

While this is a good general guideline, filter replacement timing should depend on:
• Household size
• Number of pets
• Local air quality
• Season of the year
• Usage patterns

Myth #3: All Filters Are Created Equal

Price doesn’t always indicate quality. Some budget-friendly filters can perform just as well as premium options when properly matched to your system’s specifications.

The Bottom Line

The best filter choice depends on your specific HVAC system, household needs, and local environmental factors. Consulting with a professional technician can help determine the most effective and efficient filter option for your home’s heating and cooling system.

Remember to inspect your filter monthly and replace it when it appears dirty, regardless of how much time has passed since the last change. This simple maintenance step can improve system efficiency and extend equipment life.