14x25 · Furnace & AC Filter

14x25 air filter — every MERV & depth

The 14x25 is one of the most common US furnace and return-grille sizes. A 1" filter measures about 13.5 × 24.5 × 0.75 in actual. Pick your depth and MERV rating below — higher MERV filters finer particles, so match it to your household.

14x25x1 — 1" depth

Change every 60–90 days. Set a reminder so airflow never drops.

14x25x1 · MERV 8 — Standard protectionfrom $7.38 →14x25x1 · MERV 11 — Allergy & petfrom $10.22 →14x25x1 · MERV 13 — Maximum filtrationfrom $13.05 →

14x25x2 — 2" depth

Change every 3 months. Set a reminder so airflow never drops.

14x25x2 · MERV 8 — Standard protectionfrom $10.78 →14x25x2 · MERV 11 — Allergy & petfrom $13.62 →14x25x2 · MERV 13 — Maximum filtrationfrom $16.46 →

14x25x4 — 4" depth

Change every 6–12 months. Deep media filters last far longer between changes.

14x25x4 · MERV 8 — Standard protectionfrom $17.59 →14x25x4 · MERV 11 — Allergy & petfrom $20.43 →14x25x4 · MERV 13 — Maximum filtrationfrom $23.27 →

Not sure which MERV?

MERV 8

Standard protection

Best for everyday home use — the standard choice to protect your HVAC system.

MERV 11

Allergy & pet

Best for homes with pets or mild allergies.

MERV 13

Maximum filtration

Best for allergy and asthma sufferers, and homes dealing with wildfire smoke.

MERV 8 vs 11 →MERV 11 vs 13 →MERV 8 vs 13 →

← All air filter sizes