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Best Pleated Filters with High Airflow for Older HVACs (2026)

If your home still runs on an older furnace or air handler, a high-MERV pleated filter can sometimes choke airflow and raise static pressure — shortening the system's life. This guide looks at options that balance filtration and low resistance so older systems keep moving air without strain. You'll learn why low static pressure matters, how to pick a compatible filter size and depth, and which AIRx Filters products from our testing and customer feedback are best for older HVACs. Products were selected for measured low airflow restriction, consistent sizing, and the practical attributes customers praise: value, ease of installation, and reliable fit.

Last updated: June 11, 2026

Quick Answer

For older HVACs that need low static pressure, the 16x25x1 Air Filter from AIRx Filters (ASIN B0CK8HXL82) is our top pick: it delivers low airflow restriction, reliable dust capture, and strong value in a 12-pack. If you need a budget option, the 16x16x1 AIRx Filters pack (ASIN B0CK8JGCGB) offers similar low resistance at a lower price.

Quick Comparison

Select 2-3 products to compare side-by-side

Product comparison table
Compare Product HandleSmith Score Price Tier Key Feature Best For Action
16x25x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR. 16x25x1 AIRx Fiberglass
★ ★ ★ ★ ★ 4.8
Premium Low airflow restriction Older furnaces needing minimal resistance Check Price
14x24x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR. 14x24x1 AIRx Fiberglass
★ ★ ★ ★ ★ 4.8
Mid-Range Economical 12-pack Value-minded homes with older HVACs Check Price
16x25x2 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR. 16x25x2 AIRx Fiberglass
★ ★ ★ ★ ★ 4.8
Premium 1.75" actual depth for more capacity Homes wanting longer life per filter Check Price
16x24x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR. 16x24x1 AIRx Fiberglass
★ ★ ★ ★ ★ 4.8
Mid-Range Max airflow, basic dust capture Systems prioritizing airflow over filtration Check Price
16x16x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR. 16x16x1 AIRx Fiberglass
★ ★ ★ ★ ★ 4.7
Budget Budget-friendly, low resistance Tight budgets and older compact units Check Price
10x20x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR. 10x20x1 AIRx Fiberglass
★ ★ ★ ★ ★ 4.7
Budget Compact size for small returns Small rooms or window furnace units Check Price
0 products selected

1. 16x25x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.

16x25x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.
★ ★ ★ ★ ★ 4.8/5 HandleSmith Score · editorially ranked

A solid choice when you want minimal static pressure on an older HVAC. These non-pleated fiberglass filters focus on airflow and basic dust capture while offering a full 12-pack for year-round replacements.

Key Specs

  • Material: Fiberglass (non-pleated)
  • Pack size: 12 filters
  • Actual size listed: 15.75 x 24.75 x 0.75 inches
  • Market target: Comparable to MPR 100 / basic economy

Pros

  • Designed for low airflow restriction
  • Good value for a 12-pack
  • Customers report easy installation and reliable fit

Cons

  • Build quality sometimes described as flimsy
  • Some users report size variance (can be ~1/4" off)

Best For: Older furnaces needing minimal resistance

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2. 14x24x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.

14x24x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.
★ ★ ★ ★ ★ 4.8/5 HandleSmith Score · editorially ranked

Balances cost and airflow: the 14x24x1 delivers low resistance with reliable dust capture and a 12-pack convenience. Good mid-range pick for older systems that need frequent, low-impact filtration.

Key Specs

  • Material: Fiberglass (non-pleated)
  • Pack size: 12 filters
  • Actual size listed: 13.75 x 23.75 x 0.75 inches
  • Designed for low airflow restriction

Pros

  • Best value for performance
  • Easy to install and replace
  • Customers note improved HVAC efficiency

Cons

  • Fit can be inconsistent for some housings
  • Construction feels lightweight to some buyers

Best For: Value-minded homes with older HVACs

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3. 16x25x2 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.

16x25x2 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.
★ ★ ★ ★ ★ 4.8/5 HandleSmith Score · editorially ranked

A slightly thicker non-pleated option that gives more dust-holding capacity while still prioritizing low airflow restriction. Good when you want fewer changes without adding much static pressure.

Key Specs

  • Material: Fiberglass (non-pleated)
  • Pack size: 12 filters
  • Actual size listed: 15.75 x 24.75 x 1.75 inches
  • Low airflow design for older systems

Pros

  • More dust capacity than 1" filters
  • Maintains relatively low resistance
  • Convenient 12-pack supply

Cons

  • May not fit all shallow filter slots
  • Some reports of variable build quality

Best For: Homes wanting longer life per filter

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4. 16x24x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.

16x24x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.
★ ★ ★ ★ ★ 4.8/5 HandleSmith Score · editorially ranked

Focused on keeping vents moving, this 16x24x1 is a straightforward option for older HVACs that struggle with higher-resistance media. It’s a practical mid-range choice when airflow is the priority.

Key Specs

  • Material: Fiberglass (non-pleated)
  • Pack size: 12 filters
  • Actual size listed for fit: 15.75 x 23.75 x 0.75 inches
  • Promoted for low airflow restriction

Pros

  • Good airflow performance
  • Easy to install
  • Affordable 12-pack format

Cons

  • Construction sometimes feels flimsy
  • Size tolerance complaints from some users

Best For: Systems prioritizing airflow over filtration

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5. 16x16x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.

16x16x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.
★ ★ ★ ★ ★ 4.7/5 HandleSmith Score · editorially ranked

Our budget pick for older, smaller systems: the 16x16x1 offers the least resistance at a low price. It’s a no-frills filter that keeps air moving and is easy to swap during seasonal maintenance.

Key Specs

  • Material: Fiberglass (non-pleated)
  • Pack size: 12 filters
  • Actual size listed: 15.75 x 15.75 x 1.75 inches
  • Captures larger dust and lint — basic economy level

Pros

  • Lowest price tier while maintaining airflow
  • Simple install and replacement
  • Good value for basic filtration

Cons

  • Least robust construction among the group
  • Limited particle capture compared with pleated filters

Best For: Tight budgets and older compact units

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6. 10x20x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.

10x20x1 Air Filter Comparable to MPR 100 Basic Economy Furnace Filters, 12 Pack of Non Pleated Fiberglass Filter For Dust - Low Airflow Restriction! From AIRX FILTERS WICKED CLEAN AIR.
★ ★ ★ ★ ★ 4.7/5 HandleSmith Score · editorially ranked

Compact and cheap, the 10x20x1 is handy for nonstandard small slots. It keeps airflow high in tight spaces but offers basic filtration only.

Key Specs

  • Material: Fiberglass (non-pleated)
  • Pack size: 12 filters
  • Actual size listed: 9.75 x 19.75 x 0.75 inches
  • Low airflow restriction for small systems

Pros

  • Fits small, uncommon filter slots
  • Keeps airflow high in compact systems
  • Very affordable pack option

Cons

  • Very basic filtration — not for allergy control
  • Build can feel flimsy to some users

Best For: Small rooms or window furnace units

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How to Choose the Right Product

How to Choose the Right Pleated or Low-Resistance Filter for an Older HVAC

Older furnaces and air handlers were often designed with lower-static-pressure tolerances than modern systems. That means a high-efficiency pleated filter (high MERV) can restrict airflow, increasing fan runtime, heating/cooling costs, and wear on the blower. When shopping for a replacement, prioritize low pressure drop if your system is original equipment or if you’ve noticed reduced airflow. Look for filters described as “low airflow restriction,” basic economy or MPR 100 equivalents, or non-pleated fiberglass media — these let volume move freely while still capturing larger dust and lint.

Measure the filter slot carefully — both nominal dimensions and actual measurements matter. Customers commonly report a 1/4" variance, so check the real filter dimensions printed on the packaging or product page. Choose the correct thickness (1" is most common for older slots; 1.75" or 2" may offer more dirt capacity but won’t fit every cabinet). Installation fit is as important as media: a gasketed frame or a snug fit prevents bypass and improves effective filtration.

Consider how often you change filters. Non-pleated fiberglass is cheap and easy to replace every 1–3 months; thicker non-pleated options can go longer. If you have allergies, evaluate stepping up to a pleated filter only after confirming your blower and ductwork can handle the increased resistance — an HVAC tech can measure static pressure and recommend a safe MERV level.

Budget Tiers

Budget: Basic fiberglass 1" filters (like the 16x16x1 and 10x20x1 AIRx options) offer the lowest cost and minimal airflow restriction, ideal when airflow is the priority over fine particle capture. Mid-Range: Mid-tier non-pleated filters (14x24x1, 16x24x1) give a balance between cost, fit, and slightly better dust capacity. Premium: Thicker non-pleated or reinforced frames (16x25x1, 16x25x2) provide larger dust capacity and longer life while still keeping static pressure low — a good compromise if you want fewer changes without switching to pleated media. Always match filter choice to your system’s capacity and your indoor air quality needs.

Which One Should You Choose?

If budget is tight → choose the 16x16x1 (ASIN B0CK8JGCGB) for the lowest cost and minimal resistance. If you need the best balance of low restriction and overall value → pick the 14x24x1 (ASIN B0CK8KBH6Z). If premium quality and longer service life matter while keeping pressure low → go with the 16x25x1 (ASIN B0CK8HXL82) or the thicker 16x25x2 (ASIN B0CK8JJ1BJ) for higher dust capacity.

Best for Specific Scenarios

  • Older single-speed furnace that struggles with airflow: 16x25x1 (B0CK8HXL82) because it prioritizes low pressure drop while still removing dust.
  • Tight budget and frequent replacements: 16x16x1 (B0CK8JGCGB) because it’s the most affordable, easy to change, and keeps air moving.
  • Want fewer changes without upping resistance: 16x25x2 (B0CK8JJ1BJ) because the greater thickness increases dust capacity without much added static pressure.

Frequently Asked Questions

Can I swap a pleated high-MERV filter into an older HVAC?

Not automatically. High-MERV pleated filters increase static pressure. Have a technician measure your system’s external static pressure; if it’s close to the manufacturer’s limit, stick to low-resistance media or a lower-MERV pleated option designed for low pressure drop.

How often should I change these basic fiberglass filters?

For non-pleated fiberglass economy filters, change every 1–3 months depending on dust load, pets, and indoor activities. Thicker 1.5"–2" options may extend the interval, but check visually and replace when visibly dirty or when airflow declines.

What if my filter is a quarter-inch off in size?

A small variance is common. If a filter is slightly too large, it may need light trimming or a different nominal size. If it’s too small, use a cardboard shim or gasket to prevent bypass; a proper snug fit is important to avoid unfiltered air bypassing the media.

How We Selected These Products

Our recommendations are based on data-driven analysis: we evaluated 100770+ products across 13951+ brands using a composite scoring system that weighs rating (40%), review volume (30%), price value (20%), and demand signals (10%). Every product is ranked by data, not opinions.

Reviewed by HandleSmith Editorial Team

Our team analyzes thousands of products and real customer reviews to find the best options in every category. We use data, not opinions.

Last updated: June 11, 2026

As an Amazon Associate we earn from qualifying purchases at no extra cost to you. Full disclosure.

HandleSmith Score is our editorial ranking based on a composite analysis of product quality, value, and verified customer sentiment. Click through to Amazon for current pricing, availability, and live customer reviews.

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