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Filterbuy 21x21x1 Air Filter MERV 13 Optimal Smoke & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 20.88 x 20.88 x 0.75)

Filterbuy 21x21x1 Air Filter MERV 13 Optimal Smoke & Allergy Defense (4-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 20.88 x 20.88 x 0.75)

Q: Why should I change my air filter?

To maintain a healthy lifestyle, as breathing dirty air can put you at risk to develop asthma, allergies, and other respiratory ailments. Plus, old filters can cause system defects which may lead to unwanted expenses via energy costs and repairs.

Q: When should I change my air filter?

We generally recommend replacing your filter every 90 days to keep your system running efficiently and air clean. But this is subject to change based on filter size and variable factors for pet owners, allergy sufferers, homes with children, etc.

Q: Will these air filters fit my system?

Most of our filters are universally compatible and will work with any furnace, air conditioner, heat pump, or HVAC system as long as you choose the proper size. But if you see a specific brand name on a listing, make sure it matches your unit model.

Q: How many air filters do I need?

This varies for every customer depending on specific needs such as the number of vents in your home. However, our selection includes package quantities that range from 1 to 12 filters, so no matter what your situation may be, we've got you covered.

Q: How do I change my air filter?

After finding the right size, turn off the power supply and remove the cover from your intake vent before taking out the old filter. Then just insert your new filter to match the direction of air flow, replace the cover, and turn the power back on.

Product ID: 341575983

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Details

Brand
Filterbuy
Material
Aluminum
Product Dimensions
20.88"L x x
MERV Rating
13
Compatible Devices
Air Cleaner
Item Weight
3 Pounds

🦠MERV 13 captures 98% dust & germs

♻️Made in USA, recyclable materials

🛠️Universal 21x21x1 fit

Frequently Bought Together

Filterbuy 21x21x1 Air Filter MERV 13 Optimal Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 20.88 x 20.88 x 0.75 Inches)

Filtrete 17.5x29.5x1 AC Furnace Air Filter, MERV 11, MPR 1000, Micro Allergen Defense, 3-Month Pleated 1-Inch Electrostatic Air Cleaning Filter, 6 Pack (Actual Size Pack 17.19x29.19x0.81 in)

Description

🌬️ Breathe smarter, live better — filter like a pro!

BUILT TO ENDURE - Durable beverage board frame with dual wire backing resists heat and wear for reliable performance.
ELITE AIR DEFENSE - MERV 13 synthetic media traps 98% of dust, bacteria & allergens without airflow sacrifice.
PROUDLY AMERICAN MADE - Crafted in the USA from industrial-grade recyclable materials for trusted indoor air quality.
LONG LASTING CLEAN AIR - Electrostatic pleated design with 16 pleats/ft lasts 3x longer than standard fiberglass filters.
EFFORTLESS HVAC UPGRADE - Universal 21x21x1 size fits most furnaces, ACs & heat pumps for seamless replacement.

Filterbuy’s 21x21x1 MERV 13 air filters deliver superior smoke and allergy defense with 98% particle capture, electrostatic pleated media lasting 3x longer than fiberglass, and a durable dual-wire frame. Compatible with most HVAC systems and proudly made in the USA, these filters ensure cleaner air and healthier spaces with every breath.

Specifications

Brand Name	Filterbuy
Model Info	AFB21x21x1M13pk4
Item Weight	3 pounds
Product Dimensions	20.88 x 20.88 x 0.75 inches
Item model number	AFB21x21x1M13pk4
Is Discontinued By Manufacturer	No
Part Number	AFB21x21x1M13pk4
Special Features	Dust Collection, Easy to Install, Removable
Color	Blue
Compatible Device	Air Cleaner, Air Conditioner, Furnace, HVAC System, Heat Pump
Material Type	Aluminum, Plastic, Polypropylene
Included Components	Air Filters
Batteries Included?	No
Batteries Required?	No
Manufacturer Warranty	Parts

Have a Question? See What Others Asked

Why should I change my air filter?

When should I change my air filter?

Will these air filters fit my system?

How many air filters do I need?

How do I change my air filter?

Common Questions

Are the products genuine and authentic?+

Yes, all products are sourced directly from authorized retailers in the US, UK, UAE and India. We maintain strict quality control processes and verify each product before shipping. All items come with applicable manufacturer warranties and are covered by our standard return policy.

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Delivery times vary by destination country, typically ranging from 3-9 business days. Each order is fully trackable through our system. We handle all customs clearance and use reliable courier partners for last-mile delivery. You'll receive regular updates about your order status via email and our app.

What is Desertcart? Is it safe to order from?+

Desertcart is an international e-commerce platform operating since 2014. We securely process thousands of orders globally each day. Every product goes through our quality verification process before delivery, and we provide end-to-end order tracking, 24/7 customer support, and a comprehensive returns policy to ensure a safe shopping experience.

How is product pricing calculated?+

Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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