How To | Buy A Furnace Filter

: Standard filters are often sold by "nominal size" (rounded numbers), while their "actual size" is typically inch smaller to ensure they fit into the slot. 2. Choose the Right MERV Rating

Buying a furnace filter is a straightforward task once you understand the dimensions and the rating system. A clean filter protects your HVAC system from damage, lowers energy bills, and improves the air you breathe. 1. Find Your Filter Size how to buy a furnace filter

The Minimum Efficiency Reporting Value (MERV) tells you how well a filter captures particles. : Standard filters are often sold by "nominal

: If the label is missing, measure the length, width, and depth of the filter opening using a tape measure. lowers energy bills