Keep small HVAC systems efficient with 11.25x11.25x4 filters. These compact filters provide excellent dust and allergen capture, improving indoor air quality and airflow.Tap here to shop for durable 11.25x11.25x4 filters today.
The Best
11.25x11.25x4
HVAC Air
Filters for
Your Home
Discover the best 11.25x11.25x4 HVAC air filters
to improve indoor air quality and HVAC
efficiency.
Why Air Filter Size Matters
MERV Rated Filters =
Maximum
Protection
Choose filters with higher
MERV ratings for better
filtration and air quality.
Exact Fit Matters
The Filterbuy 11.25×11.25×4
pleated air filter seals
tight and prevents air
leaks.
Made-in-the-USA,
Fast Shipping
Filterbuy air filters are
manufactured
domestically and
shipped quickly.
Filterbuy Delivers
Quality
Filters are individually
tested for durability and
precision fit.
2024 Proprietary and Confidential. All Rights Reserved.
2
Choosing the Right Filter for Your Needs
Exact Fit Matters
MERV Rated Filters
The Filterbuy 11.25x11.25x4 pleated air filter
seals tight and prevents air leaks,
ensuring maximum surface contact and
filter power.
Higher MERV ratings mean better filtration
of particles like dust, pollen, and allergens,
while ensuring proper airflow through
your HVAC system.
Filterbuy Quality
Filterbuy air filters are individually tested
for durability and precision fit, delivering
high-quality, made-in-the-USA products
with fast shipping.
2024 Proprietary and Confidential. All Rights Reserved.
3
Features of Filterbuy 11.25x11.25x4
Pleated Air Filters
Efficient Electrostatic Media
Filterbuy uses a special synthetic electrostatic media that is
more efficient at catching small particles compared to basic
cotton media.
Quality Construction
Filterbuy filters feature a durable,
beverage board frame that can handle
humidity and temperatures up to 200°F
without warping or weakening.
MERV Rated Filters
Choose pleated filters with higher MERV
ratings for better dust, allergen, and
particle filtration while maintaining
proper airflow.
Made in the USA
Filterbuy air filters are proudly made in the USA and delivered with
fast shipping for your convenience.
Exact Fit Matters
The Filterbuy 11.25x11.25x4 pleated air filter
seals tight and prevents air leaks,
ensuring maximum surface contact and
filter power.
2024 Proprietary and Confidential. All Rights Reserved.
4
https://filterbuy.com/air-filters/11-25x11-25x4/
https://filterbuy.com/air-filters/11-25x11-25x4/
Why Choose
Filterbuy?
Filterbuy's 11.25x11.25x4 allergen air filter is
designed to fit snugly in HVAC systems
that require this unique size, eliminating
gaps that allow unfiltered air to pass
through. Using the wrong size air filter can
increase your energy bills as your HVAC
struggles to pull air through a poorly
fitting filter, working harder and wasting
energy.
Discover more
at https://filterbuy.com/air-filters/11-25x11-
25x4/
Frequently Asked Questions
What is an Allergen
Air Filter?
A high-efficiency HVAC
filter designed to trap
common airborne
irritants like pollen, dust,
pet dander, and mold
spores
Best Air Filter for
Residential Use
MERV 11 or MERV 13 pleated
filters offer the best
balance of filtration and
airflow, capturing
harmful particles while
maintaining HVAC
efficiency
Ideal Air Filter for
Allergies and Pets
A MERV 13 filter traps fine
pet dander, fur, pollen,
and other allergens -
choose a custom-sized
pleated filter to prevent
air leaks
Optimal MERV
Rating for Allergies
MERV 13 filters capture
over 90% of particles as
small as 0.3 microns,
including pollen, dust
mites, pet dander, and
bacteria
2024 Proprietary and Confidential. All Rights Reserved.
6
11.25x11.25x4
HVAC Air
Filters for
Your Home
Discover the best 11.25x11.25x4 HVAC air filters
to improve indoor air quality and HVAC
efficiency.
Why Air Filter Size Matters
MERV Rated Filters =
Maximum
Protection
Choose filters with higher
MERV ratings for better
filtration and air quality.
Exact Fit Matters
The Filterbuy 11.25×11.25×4
pleated air filter seals
tight and prevents air
leaks.
Made-in-the-USA,
Fast Shipping
Filterbuy air filters are
manufactured
domestically and
shipped quickly.
Filterbuy Delivers
Quality
Filters are individually
tested for durability and
precision fit.
2024 Proprietary and Confidential. All Rights Reserved.
2
Choosing the Right Filter for Your Needs
Exact Fit Matters
MERV Rated Filters
The Filterbuy 11.25x11.25x4 pleated air filter
seals tight and prevents air leaks,
ensuring maximum surface contact and
filter power.
Higher MERV ratings mean better filtration
of particles like dust, pollen, and allergens,
while ensuring proper airflow through
your HVAC system.
Filterbuy Quality
Filterbuy air filters are individually tested
for durability and precision fit, delivering
high-quality, made-in-the-USA products
with fast shipping.
2024 Proprietary and Confidential. All Rights Reserved.
3
Features of Filterbuy 11.25x11.25x4
Pleated Air Filters
Efficient Electrostatic Media
Filterbuy uses a special synthetic electrostatic media that is
more efficient at catching small particles compared to basic
cotton media.
Quality Construction
Filterbuy filters feature a durable,
beverage board frame that can handle
humidity and temperatures up to 200°F
without warping or weakening.
MERV Rated Filters
Choose pleated filters with higher MERV
ratings for better dust, allergen, and
particle filtration while maintaining
proper airflow.
Made in the USA
Filterbuy air filters are proudly made in the USA and delivered with
fast shipping for your convenience.
Exact Fit Matters
The Filterbuy 11.25x11.25x4 pleated air filter
seals tight and prevents air leaks,
ensuring maximum surface contact and
filter power.
2024 Proprietary and Confidential. All Rights Reserved.
4
https://filterbuy.com/air-filters/11-25x11-25x4/
https://filterbuy.com/air-filters/11-25x11-25x4/
Why Choose
Filterbuy?
Filterbuy's 11.25x11.25x4 allergen air filter is
designed to fit snugly in HVAC systems
that require this unique size, eliminating
gaps that allow unfiltered air to pass
through. Using the wrong size air filter can
increase your energy bills as your HVAC
struggles to pull air through a poorly
fitting filter, working harder and wasting
energy.
Discover more
at https://filterbuy.com/air-filters/11-25x11-
25x4/
Frequently Asked Questions
What is an Allergen
Air Filter?
A high-efficiency HVAC
filter designed to trap
common airborne
irritants like pollen, dust,
pet dander, and mold
spores
Best Air Filter for
Residential Use
MERV 11 or MERV 13 pleated
filters offer the best
balance of filtration and
airflow, capturing
harmful particles while
maintaining HVAC
efficiency
Ideal Air Filter for
Allergies and Pets
A MERV 13 filter traps fine
pet dander, fur, pollen,
and other allergens -
choose a custom-sized
pleated filter to prevent
air leaks
Optimal MERV
Rating for Allergies
MERV 13 filters capture
over 90% of particles as
small as 0.3 microns,
including pollen, dust
mites, pet dander, and
bacteria
2024 Proprietary and Confidential. All Rights Reserved.
6