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VariCel High Efficiency Box Filters

Overview

VariCel® filters are high-capacity, extended surface, supported box filters designed for a wide range of applications. Their rigid construction and supported pleat media ensure durability, even in harsh operating environments with variable air volume, turbulent airflow, high humidity, and exposure to moisture. These filters are particularly suited for seacoast installations and high-dust environments.

Key Features

  • Available in MERV 15, MERV 14, MERV 13, and MERV 11 efficiencies
  • Engineered for excellent performance in challenging conditions
  • MERV 14 available with antimicrobial treatment
  • MERV 15, MERV 14, and MERV 13 meet LEED® Project Certification efficiency requirements
  • UL Classified for reliable performance

Dual-Density Media for Cost Savings

The dual-density media design, with coarser fibers on the air entering side and finer fibers on the air leaving side, maximizes dust-holding capacity, extending filter life and reducing operating costs. VariCel filters are water-resistant, making them ideal for humid conditions.

Designed to Improve Indoor Air Quality (IAQ)

VariCel filters, particularly in MERV 14 and MERV 15 ratings, effectively capture fine particles, including bacteria and viruses, improving indoor air quality. The MERV 14 version is also available with antimicrobial-treated media to preserve filter integrity throughout its lifespan.

Product Options

  • Available in 12" and 6" depths for different air flow needs
  • Optional faceguards made of galvanized or aluminized steel
  • Factory-installed gaskets for easy installation
  • Vinyl-coated separators for corrosive environments

Performance Data

  • Operating temperature limits: up to 900°F, depending on the filter type
  • Recommended final resistance: 1.5" w.g. (1.2" w.g. for HT filters)
  • Tested in accordance with ASHRAE Standard 52.2

Filtros

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$ 479.99 - $ 479.99
$ 479.99
$ 479.99 - $ 479.99
$ 479.99

AAF Flanders VariCel II Extended Surface Mini-Pleat (4 Filters)

Designed for high performance under both normal and difficult operating conditions, VariCel II filters are appropriate for general HVAC and applica...

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$ 479.99 - $ 479.99
$ 479.99
$ 479.99 - $ 479.99
$ 479.99

Your Trusted Source For VariCel Filters

We offer a complete selection of high-performance VariCel HVAC filters. Whether you're replacing filters in your home, office, or commercial HVAC system, you'll find trusted options in MERV 1–13, including pleated, fiberglass, washable, and specialty filters.

All VariCel filters are made in the USA and sourced from leading manufacturers like AAF Flanders and Koch Filter. Choose from standard and custom sizes to ensure a proper fit for your system—and enjoy clean air backed by over 50 years of HVAC experience.

Filter Fit Guarantee™

Have concerns about ordering VariCel filters online? Your purchase is backed by our Filter Fit Guarantee™.

Free Delivery

We will ship your VariCel filters direct to your door, for free! All orders in the domestic U.S over $50.

Highly Rated VariCel Filters

VariCel High Efficiency Box Filters from leading manufactuerers.

Have questions about VariCel Filters?

What are VariCel filters designed for?

VariCel are designed to capture airborne particles and improve system performance in a wide range of HVAC and air filtration applications.

How do I know if VariCel are right for my system?

The best way to determine if VariCel are right for your system is to check your current filter specs, system requirements, or reach out to our team—we’re happy to help you choose the correct option.

Are VariCel filters used in residential or commercial systems?

VariCel can be used in a variety of applications depending on system compatibility. Some are ideal for homes, while others are built for commercial, industrial, or specialized environments.

How often should VariCel filters be replaced or maintained?

Replacement schedules for VariCel filters vary based on environment, usage, and filter type. Always follow manufacturer guidelines or consult your facility manager or HVAC technician for best results.

What efficiency levels are available in VariCel?

VariCel filters are available in a range of filtration levels—from basic to high-efficiency—based on your air quality goals and system requirements.

Are your VariCel filters made in the USA?

Most of our VariCel replacements are proudly made in the USA by trusted manufacturers known for quality and performance.

What makes RememberTheFilter.com a trusted source for VariCel filters?

With nearly 20 years online and over 50 years of HVAC experience, we offer only high-quality VariCel replacement filter from leading brands—backed by real expertise and personalized support.

What MERV Rating Is Right for You?

MERV (Minimum Efficiency Reporting Value) measures how well an air filter captures particles. A higher number means better filtration—but it must still be compatible with your HVAC system. Here's a breakdown to help you choose the right filter for your home or business.

MERV 1–4

Basic protection. Captures larger particles like dust, lint, and pollen. Minimal airflow resistance. Best for older systems or basic residential use.

✔ Highest airflow
✘ Does not trap fine particles

MERV 8

Great balance of airflow and filtration. Captures mold spores, dust mites, pet dander, and pollen. Most common choice for residential HVAC systems.

✔ Good airflow
✔ Effective for everyday air quality needs

MERV 10

Enhanced dust-holding capacity and improved particle removal compared to MERV 8. Traps finer particles like mold spores, hair spray, and fabric fibers.

✔ More efficient than MERV 8
✔ Still maintains strong airflow

MERV 11

Captures smaller particles like auto emissions, smoke, and some airborne bacteria. Ideal for homes with pets or allergy concerns. Moderate impact on airflow.

✔ Great for allergies
✘ May reduce airflow in older systems

MERV 13

Highest residential-grade filtration. Captures airborne bacteria, tobacco smoke, and fine particles. Recommended for asthma, smoke exposure, or medical-grade needs.

✔ Best indoor air quality
✘ Not suitable for all systems without airflow evaluation

How to Measure HVAC Filters

To find the correct replacement, measure the length, width, and depth of your existing filter. Most filters are labeled with a nominal size (like 16x24x1), which is a rounded number—actual measurements are often slightly smaller. Accurate sizing ensures a proper fit and helps maintain airflow efficiency.

How to Measure HVAC Filter

Step 1: Remove Old Filter

Turn off your system and remove the existing filter. Look for printed dimensions on the frame—this is usually the nominal size.

Step 2: Measure Actual Size

Use a tape measure to get exact dimensions (length × width × depth). Round down to the nearest 1/8" if needed—example: 15-5/8" × 23-5/8" × 3/4".

Step 3: Match or Order Custom

If your measurements don’t match a standard size, we offer custom filters made to your exact dimensions.

Trust RememberTheFilter.com for Premium HVAC Filters & Expert Service

With nearly 20 years online and over 50 years of combined HVAC filter experience, we’re more than just a retailer—we’re filtration experts. As a proud member of the National Air Filtration Association (NAFA), we serve residential, commercial, and government customers across the U.S. Our filters are made in America and sourced from leading manufacturers like AAF Flanders, Koch Filter, and more.

We believe in clean air, fair prices, and helping people—not algorithms.

  • ✅ Nearly 20 years online helping homeowners and businesses nationwide
  • ✅ 50+ years of combined HVAC filtration experience
  • ✅ Member of NAFA – National Air Filtration Association
  • ✅ Made in the USA – filters from AAF Flanders, Koch, and more
  • ✅ Exact Filters® – custom built to your specs, down to 1/8"
  • ✅ Trusted by schools, clinics, and commercial buildings across the U.S.

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