How do I know what size air filter to buy?
Selecting the correct air filter size, such as the 20x20x1, is vital for efficient HVAC system function, air quality, and system longevity. Air filter sizes are denoted in length, width, and thickness. Determine the right size by checking the current filter, measuring the filter slot, or consulting the manufacturer. Consider thickness, material, and MERV rating, and perform regular maintenance for optimal performance.
