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Specifications

Nominal size20 × 25 × 4 in
Actual size19.5 × 24.5 × 3.75 in
Depth4 inch
MERV rating10, 13, 8
Pleat typePleated, extended surface

20x25x4 4in HVAC Air Filter

Price range: $25.99 through $37.99

4" depth · pleated · managed replenishment

Set up auto-replenishment

We track your filter schedule and ship before you run out — delivered pre-labeled to every unit. Talk to us about a managed program.

  • Delivered pre-labeled to every unit
  • Every change documented for compliance
  • Right-fit guarantee — wrong size, we make it right

20 x 25 x 4 pleated HVAC air filter, 4-inch depth. Choose your MERV rating below. Part of the Airestor managed program — automatic replenishment, delivered to every door, fully documented.

SKU: AIR-4-20X25X4
Category:
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Description

Nominal size 20 x 25 x 4 (the size printed on your current filter). Actual dimensions measure approximately 19.5″ x 24.5″ x 3.75″ — about a half inch under nominal, which is normal and lets the filter seat properly.

4-inch depth pleated HVAC filter. Select your MERV rating above:

  • MERV 8 — standard protection. Captures dust, lint, and pollen. The dependable workhorse for most units.
  • MERV 10 — a step up in filtration for finer particles. A modest upgrade for IAQ-conscious properties.
  • MERV 13 — captures very fine particles. Our premium indoor-air-quality and guest-experience tier.

Every Airestor filter is part of a managed program: we map your sizes, auto-ship before you run out, deliver pre-labeled to each unit, and document every change. Filters Made Easy.

Additional information

MERV Rating

MERV 10, MERV 13, MERV 8
Filter Size

20 x 25 x 4
Depth

4"

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Choosing a filter

Which MERV rating is right for you?

MERV 8Standard

Catches dust, lint, pollen, and dust mites. The dependable workhorse for most units.

Best for: standard multifamily turnover, budget-sensitive units, frequent change-outs.

MERV 10Better

Adds finer dust, mold spores, and pet dander. A modest step up in air quality.

Best for: properties marketing cleaner air; pet-friendly units.

MERV 13Best · IAQ

Captures very fine particles — smoke, bacteria, fine allergens. Our guest-experience tier.

Best for: hotels, healthcare-adjacent, review-sensitive properties.

What each tier captures, by particle size

Pollen, dust10+ µm8 · 10 · 13
Mold, dander3–10 µm10 · 13
Smoke, bacteria0.3–3 µm13 only

Higher MERV captures smaller particles. All three handle everyday dust; only MERV 13 reaches the finest. µm = micron. Match the rating to your system — very high MERV in an undersized system can restrict airflow.

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