Central Air Conditioning Filters Buy «8K • 2K»

Look for the "nominal size" (e.g., 20x25x1) printed on the edge of your current filter.

The Minimum Efficiency Reporting Value (MERV) scale (1–16) measures how well a filter captures particles. What is a MERV rating? | US EPA central air conditioning filters buy

Size is the most critical factor; an ill-fitting filter allows unfiltered air to bypass the system. Look for the "nominal size" (e

Residential filters are typically 1 inch thick, but high-efficiency systems may use 4- or 5-inch filters. 2. Choose the Right MERV Rating Look for the "nominal size" (e.g.