All filters are made in the USA  – Order Today


Premium Filters
Protects all against
Protects all against

12.5x21x1 – Merv 13

12.5x21x1 – Merv 13
AC Furnace Air Filter
Rated 0.0 out of 5
0.0 out of 5 stars (based on 0 reviews)

Select Filter Quality

Total Price
Price per filter $0
Quantity Price Per Filter
1 $0.00
2 $0.00
3 $0.00
4-5 $0.00
6-11 $0.00
12+ $0.00

Product Description

Filter Size: 12.5x21x1A

Actual Size: 12.5x21x1

Actual Size Fraction : 12-1/2x21x1

Customer Reviews

Rated 0.0 out of 5
0.0 out of 5 stars (based on 0 reviews)
5 Star0%
4 Star0%
3 Star0%
2 Star0%
1 Star0%

Review this product

Share your thoughts with other customers

Top Reviews

There are no reviews yet. Be the first one to write one.

Shop 12.5x21x1 Air Filters Online

Need a filter that can improve indoor air quality? Custom Filters Direct provides you with quality 12.5x21x1 air filters yet budget-friendly options for residential and commercial areas. These custom air filters are designed to withstand high humidity while removing airborne allergens from larger to smaller that flow in the air stream. With these high-efficiency air filters, you are not only improving the indoor air quality but also making your space more comfortable for others as well. Our air filters feature a premium fabrication material that allows them to deliver superior performance every day.

Custom Filters Direct 12.5x21x1 air filters are very helpful for those who want to remove possible allergens such as dust, mold, mildew, and pet dander. These furnaces and HVAC filters also provide relief to those suffering from asthma and other respiratory illnesses. Our air filters are 100% made in the USA, using synthetic filter media that absorb moisture and will not support the growth and spread of microbes.

Maintaining Air Filters

As time passes, filters accumulate the dirt, tend to clog up and require replacement. The lifetime of your filter depends on how many airborne particles are moving in the air. If you want to install or replace your air filter, choose Custom Filters Direct’s reliable delivery service. Frequently replacing the air filters will help you maintain healthy indoor air quality while improving the efficiency of your HVAC system, ultimately saving you time and money. With every HVAC air filter, we cut out the middleman cost to get you the air filters at the most affordable prices.

MERV 8, MERV 11, MERV 13 Air Filters

Choosing the right MERV rating is the key to eliminating different types of harmful particles that flows in your space.

MERV 8 Air Filters
They are commonly used in standard households. MERV 8 filters will capture up to 85 percent of the air particles between 3.0 to 10.0 microns in size.

MERV 11 Air Filters
They are commonly used in superior HVAC systems, hospital labs, and commercial buildings. MERV 8 air filters are effective at eliminating more than 85 percent of the particles between 3.0 to 10.0 microns in size.

MERV 13 Air Filters
They can be used in almost any building where superior indoor air quality is required such as schools, hospitals, surgery units, labs, and more. MERV 13 air filters capture 90% of air particles between the sizes of 3.0 to 10.0 microns and up to 75% of airborne contaminants between the size of 0.3-1.0 microns.