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.

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.

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.

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.

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.

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Filterbuy 18x30x1 Air Filter MERV 8 Dust & Allergy Defense (4-Pack)

Product ID: 39505037

Details

Brand
Filterbuy
Compatible Devices
Air Cleaner
Filter Mounting Type
Slide In
Filter Shape
Rectangular
Item Weight
0.27 g
MERV Rating
8

⏳3x longer life than fiberglass filters

🌀MERV 8 captures 90% dust & allergens

📏Precise 17.75x29.75x0.75 in size

R6297

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🌬️ Elevate your air game—because fresh air is the new luxury!

PROUDLY MADE IN THE USA - Crafted with recyclable materials and trusted by millions for dependable indoor air quality.
ROBUST FRAME NO WARPING - Industrial-grade beverage board frame with dual wire backing resists heat and humidity for lasting performance.
ADVANCED MERV 8 FILTRATION - Blocks pollen, mold, lint, and dust with 90% efficiency—breathe cleaner, live healthier.
DURABLE ELECTROSTATIC PLEATS - 14 pleats per foot trap microscopic particles while lasting three times longer than standard filters.
UNIVERSAL FIT EFFORTLESS UPGRADE - Perfectly sized for most HVAC systems, ensuring seamless installation and optimal airflow.

Filterbuy’s 18x30x1 MERV 8 air filters deliver superior dust and allergen defense with electrostatically charged pleated media that captures 90% of airborne particles. Designed for universal compatibility with furnaces, ACs, and heat pumps, these durable filters last three times longer than fiberglass alternatives. Featuring a sturdy beverage board frame with dual wire backing, they resist warping and extreme temperatures. Made in the USA from recyclable materials, this 4-pack ensures your indoor air stays fresh and healthy with easy installation and reliable performance.

Specifications

ASIN	B00CJZ8F74
Air Filter Construction	Pleated
Best Sellers Rank	#5 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1 in Furnace Filters
Brand Name	Filterbuy
Common Applications	Allergen Reduction, High Strength
Compatible Devices	Air Cleaner, Air Conditioner, Furnace, HVAC System, Heat Pump
Compatible Hvac Systems	Commercial, Industrial, Residential
Customer Reviews	4.7 4.7 out of 5 stars (154,701)
Filter Airflow Direction	Variable
Filter Mounting Type	Slide In
Filter Shape	Rectangular
Included Components	Air Filters
Item Dimensions L x W x Thickness	29.75"L x 17.75"W x 0.75"Th
Item Highlight	Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 17.75 x 29.75 x 0.75)
Item Type Name	Air Filter
Item Weight	0.27 g
MERV Rating	8
Manufacturer	Filterbuy
Manufacturer Part Number	AFB18x30x1M8pk4
Material Type	Aluminum, Plastic, Polypropylene
Max Temperature	200 °F
Max Velocity	615 cfm
Model Number	AFB18x30x1M8pk4
Number of Items	1
Number of Packs	1
Product Grade	Replacement Parts
UPC	717267051507
Unit Count	4 Count
Warranty Description	Defective items and products that were shipped incorrectly are subject to a refund or replacement on a case by case basis. Please contact our customer support team for more information if you experience any issues.

Common Questions

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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.

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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.

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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Smooth transaction and product arrived in perfect condition.

3 weeks ago

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