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Actual Size: 17.25x29.25x3.63"
3 month filters
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Made in the USA
Ships in 24 hours
Available In MERV Rating: 8, 11, 13
Made in the USA
Ships in 24 hours
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 MERV 8 |  MERV 11 |  MERV 13 | |
|---|---|---|---|
| Best for | Standard Residential/Commercial Healthy Families | Superior Residential/Commercial Allergy Sufferers | Optimal Residential/Commercial Hospital Grade |
| Comparable ratings | MPR 600 & FPR 5 | MPR 1000-1200 & FPR 7 | MPR 1500 - 1900 & FPR 10 |
| Filtration | Captures 90% of Airborne Particles | Captures 95% of Airborne Particles | Captures 98% of Airborne Particles |
| Dust, lint & debris | |||
| Mold, pollen | |||
| Dander, dust mites | |||
| Smoke & Smog | |||
| Bacteria | |||
| Odor, vocs |
Generally, we recommend you replace your air filters every 90 days. Find out below if you should change your filters more often.
Change your filter every
6 weeks
to ensure indoor air quality is at its best.
Change your filter every
2 months
to avoid shedding and odor buildup.
Change your filter every
2-3 months
as having clean air is even more important with children in your home.
Change your filter every
6 weeks
to ensure indoor air quality is at its best.
Change your filter every
2 months
to avoid shedding and odor buildup.
Change your filter every
2-3 months
as having clean air is even more important with children in your home.
Struggling to find the right 17.25x29.25x4 HVAC and furnace air filters that truly deliver clean air and system efficiency? At Filterbuy, we don’t just sell filters we’ve spent years testing and refining our selection to offer you only the highest performing options that meet rigorous standards for durability and filtration. Discover why homeowners trust Filterbuy for filters. They go beyond basic protection to bring you cleaner and healthier air every day.
A 17.25x29.25x4 air filter is a 4-inch deep pleated HVAC filter measuring 17.25" wide by 29.25" tall — a specialty size most commonly found in whole-home media air cleaners and high-efficiency furnace cabinets. Because it's not a standard big-box size, fit precision matters more than brand recognition.
The fast facts:
Actual size = listed size. Unlike many 1" filters, 4" deep filters are typically labeled with their true dimensions, so 17.25x29.25x4 means exactly that. Don't round up to 18x30x4 — you'll get air bypass.
MERV options at Filterbuy: MERV 8 (everyday dust), MERV 11 (allergens, dander, pollen), MERV 13 (smoke, bacteria, fine particulates).
Replace every 6–12 months. Thicker 4" filters last 3x to 4x longer than 1" filters because they have more pleated surface area to catch particles.
Better airflow than 1" filters. More media = lower pressure drop, which means your HVAC works less hard at the same MERV level.
Made in the USA, ships free, factory-direct. Bulk packs save up to 70% per filter, and Auto-Delivery means you never have to remember the size again.
Bottom line: If your filter slot is 17.25x29.25x4, that's the exact size to order — no rounding, no "close enough." A precise fit is the difference between filtered air and air sneaking around the edges of an expensive filter.
Use the exact 17.25x29.25x4 filter for best fit and performance.
Filterbuy quality filters capture up to 98% of allergens.
Good filtration improves HVAC efficiency by up to 15%.
Extends HVAC life.
Replace filters regularly. This keeps air clean and your HVAC running smoothly.
It’s important to choose the best 17.25x29.25x4 air filter. Filterbuy filters allow strong airflow while trapping dust and other particles. They fit tightly in the frame and stop air from leaking around the filter.
Filterbuy filters also lower the strain on your HVAC. This improves energy efficiency and helps your HVAC last longer.
We use high quality materials tested for strong performance. Our filters support airflow, reduce pressure drop and come in top MERV ratings to meet your air quality needs.
Built with durable frames and pleated synthetic media these filters capture a wide range of airborne particles. This level of filtration supports better respiratory health while also helping your HVAC maintain airflow and peak efficiency.
Filterbuy offers 17.25x29.25x4 pleated air filters in MERV 8, 11, and 13.
Filterbuy 17.25x29.25x4 air filter MERV 8 - basic filtration
Filterbuy 17.25x29.25x4 air filter MERV 11 - improved air quality
Filterbuy 17.25x29.25x4 air filter MERV 13 - maximum protection against bad particles.
From years of experience with thousands of homeowners we’ve seen why quality filtration matters:
Indoor air pollution is higher.
Choosing the right and quality filter is important for healthy indoor air.
Source: EPA
High quality filters reduce allergens by up to 98%.
Our customers report improved comfort and relief from allergies.
Source: American Lung Association
Correctly sized HVAC filters improve HVAC performance by 5-15%.
Well fitted filters help reduce energy costs and extend HVAC equipment's lifespan.
Source: US Department of Energy
Follow these simple steps to get started:
Measure your filter size
Confirm your HVAC or furnace filter is 17.25x29.25x4.
Browse our selection
Find the perfect filter at Filterbuy.com
Choose your MERV rating.
Pick the filtration level according to your needs.
Place your order
Add to cart and enjoy fast shipping.
Install and maintain
Replace filters regularly for optimal performance.
Take out your new air filters from Filterbuy packaging.
Detach the old filter.
Verify system compatibility with the filter.
Start experiencing better air quality in your environment.
Maintain clean air.
Replace the filter every 60 to 90 days. Replace it more often if you have pets or allergies.
Free, Super Fast Shipping — Sometimes next-day.
Buy packs, get up to 70% off each filter.
These filters actually last for 90 days — way longer than cheap fiberglass versions.
Made right here in the USA with super high quality materials.
Auto Delivery option —save another 5% and you'll never forget to replace your filters again.
Super Easy, Super Affordable.
This size indicates the filter’s dimensions—17.25 inches wide, 29.25 inches tall, and 4 inches thick. It’s important to use the exact size to ensure a proper fit, preventing air bypass and maintaining filtration efficiency.
Filters should be replaced every 3 months. However, this can vary based on factors like home environment, pets, allergies, or HVAC usage. Regular replacement keeps your HVAC efficient and your indoor air clean.
Minimum Efficiency Reporting Value rates a filter’s ability to capture particles. Ratings range from 1 to 16+. For most homes, a MERV 8-13 filter offers a good balance of air quality and airflow. But higher ratings may be better for allergy sufferers or homes with pets.
At Filterbuy, we specialize in precise sizes like air filter17.25x29.25x4 and focus on tested, high quality filters. Our experience with thousands of customers ensures you get reliable products tailored for your home’s needs, backed by expert support.
Yes. Filters that don’t fit properly allow unfiltered air to bypass, letting dust and debris into your unit. This can reduce efficiency, cause damage over time and lead to higher energy costs.
Buy directly from trusted online suppliers. Filterbuy.com is a great source. This saves you time. You do not have to search many stores.
Filterbuy.com is your most reliable source. They specialize in a wide variety of air filter sizes, including the best 17.25x29.25x4 air filter and offer direct shipping.
Choose the correct size
Turn off the power supply
Remove the old air filter
Dispose the old product
Insert the best 17.25x29.25x4 electrostatic air filter from Filterbuy
Replace the cover
Yes. A 17.25x29.25x4 carbon air filter is the same as a 17.25x29.25x4 charcoal air filter. They’re the best at improving your home’s air quality and keeping unpleasant odors away.
Using a cheap 17.25x29.25x4 fiberglass air filter might save you a little money upfront. But cheap filters don’t last long or clean the air well. A high-quality 17.25x26x4 air filter for allergies with the right MERV rating protects your HVAC and your health.
Get the exact 17.25x29.25x4 HVAC and furnace air filters that fit right, last longer, and ship free to your door — straight from the Filterbuy factory. Shop your size now and save up to 70% when you buy in bulk, or set up Auto-Delivery so clean air shows up without you having to think about it.
