Sale!

12x18x1

4-Pack of Air Filters

$37.88 – $65.40

60% Off

EVERY SIZE

All Standard Sizes in Stock
Need a custom size? Not a problem, we can make any size filter your equipment calls for.

MADE IN THE USA

Locally Manufactured
High quality American sourced products assembled locally and delivered right to your door.

WHOLESALE PRICING

Industry Best Pricing
40%+ off compared to the name brand competitors direct from the manufacturer.

FAST, FREE SHIPPING

Mailed Next Business Day
Order $50+ of FilterBox air filters and your order ships FREE anywhere in the USA.

Why Buy Air Filters from FilterBox?

  • Filters delivered right to your front door.
  • Pleated air filters are 20 times more effective than fiberglass filters.
  • Frames are made out of heat resistant paperboard with horizontal grid supports. Capable of withstanding temperatures up to 200° F and resistant to moisture, the paperboard frames do not support microbial growth and outperform traditional cardboard frames.
  • Chemical free, electrostatically charged synthetic polyester media is pleated, maximizing the surface area, to capture a high number of airborne particles as small as 0.3 microns with low air flow resistance. To increase durability, the media is supported with a corrosion resistant steel wire.

Understanding MERV Ratings – an Air Filter Guide

MERV stands for Minimum Efficiency Reporting Value. It’s an acronym created by the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) to provide a scale showing the effectiveness of filters at removing particles of different sizes.

Even though lower MERV rated filters tend to be less efficient overall, they do allow more air to flow through the filter which can improve the operation of your HVAC system. Finding the right air filter and MERV rating for your system is important.

ASHRAE recommends advise filters with a minimum MERV rating of 6, and the U.S. Department of Energy recommends MERV 13. The right MERV rating on the right filter could really impact your indoor air quality, your health, and your lifestyle. So picking the right air filter matters.

Higher Is Not Always Better

It’s often that people make this assumption: The higher the MERV rating, the better the air filter. This is NOT the case! The truth is, the higher the MERV rating, the smaller the pores for air to pass through. This can create more resistance in airflow than your system is designed to manage, thus making it less efficient. Reducing the air flow in your system can actually worsen the air quality in your home and put a damaging amount of pressure on your systems fan. So doing the research can be worth it.