Air Filters

30+ products

Expected delivery: Tue, Nov 17

HVAC air filters for furnaces, air handlers, rooftop units and return grilles. This subcategory covers pleated filters, fiberglass panel filters, and higher efficiency filters in common nominal sizes and 1, 2 and 4 in. depths. Ratings follow the MERV scale, with MERV 8, 11 and 13 common choices in commercial buildings. Filters are usually sold by the case, which helps when the same size is used across many units.

What to check before you order

  • Nominal size. Read the size printed on the old filter frame, such as 16 x 25 x 2. Actual dimensions are slightly smaller by design.
  • MERV rating. Higher MERV captures smaller particles but adds resistance to airflow. Stay with what the equipment is designed for unless your HVAC contractor approves a change.
  • Depth. Use the depth the filter rack or housing is built for. Do not stack thin filters to fill a deep slot.
  • Pleated or fiberglass. Pleated filters capture more dust and usually last longer. Fiberglass panels are low cost and low resistance but catch mostly larger particles.

Keep a log of sizes and locations so each change is quick. Building teams can set up vendor managed inventory to keep the right sizes on the shelf. Fans and HVAC parts are in fans, heaters and HVAC parts, and the full section is HVAC and filters.

Common questions

What does MERV mean on an air filter?

MERV stands for Minimum Efficiency Reporting Value, from ASHRAE Standard 52.2. It runs from 1 to 16, and higher numbers capture more small particles.

Which way should the arrow on an air filter point?

The arrow points in the direction of airflow, toward the blower and away from the return grille.

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