The Truth About Furnace Filters What Your HVAC Company Wants You to Know


Debunking a Common HVAC Myth

One of the most persistent myths in home heating and cooling is that expensive, high-MERV furnace filters are always better for your HVAC system. As heating and cooling professionals serving the Triangle area, we encounter this misconception frequently among our indoor air quality conscious customers.

Let’s break down the truth:

The Reality of Furnace Filters

• Not all HVAC systems are designed to handle high-MERV filters
• More expensive doesn’t always mean better performance
• Using filters that are too restrictive can damage your system

What Actually Matters

1. Proper filter fit
2. Regular replacement schedule
3. Filter rating appropriate for your specific system

Many homeowners don’t realize that using a filter that’s too dense can actually restrict airflow, forcing your furnace to work harder and potentially leading to system failures. This is particularly important in areas like Durham and Chapel Hill, where humidity levels can affect system performance.

Best Practices for Filter Selection

• Consult your owner’s manual for recommended MERV ratings
• Change filters every 1-3 months depending on usage
• Consider your specific needs (pets, allergies, etc.)

Remember, the goal is to find the right balance between air filtration and system efficiency. When in doubt, it’s always better to consult with a professional who can evaluate your specific system requirements rather than simply choosing the most expensive option available.

Regular maintenance and proper filter selection are key to maintaining your HVAC system’s efficiency and longevity, especially through our variable North Carolina seasons.