Furnace Filters Replacement
Shop furnace filters by size, thickness and MERV rating for compatible residential HVAC systems. Compare the existing filter label, actual dimensions and equipment requirements before ordering a replacement.
Nominal filter size and actual measured size may differ. Confirm the dimensions printed on the current filter and choose a MERV rating the system can accommodate.
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Frequently Asked Questions
Read the size printed on the current filter and measure the actual length, width and thickness. Compare all three values with the product specifications.
MERV is a rating used to compare how filters capture specific particle sizes. Select a rating that the HVAC equipment and filter slot are designed to accommodate.
Nominal sizes are rounded category labels. The physical filter is often slightly smaller so it can fit the filter cabinet.
Follow the HVAC and filter manufacturer’s guidance. System use, filter depth and household conditions can affect replacement timing.