General Air Filters

Buy General Air Filters, and General Furnace Filters General Air Conditioner Filter offer great air quality and performance as they are made with high quality frame media, deep pleats and electrostatic filter. These materials enhance the quality of the filter. There are many standard sizes available from which you can select the one that fits your heating or cooling system best. General Filter Replacements are suitable for households and commercial buildings. They are made with guaranteed materials which are designed and tested many times. General AC Filter gives high efficiency as compared to other filters. They block all the unwanted harmful particles that are present in the air such as dust, pollen, debris, bacteria and pet dander. When they block the harmful particles, you are able to breathe in clean air. General Furnace Filters have MERV rating of 11 which is much superior to its competitors MERV ratings. The electrostatic filter media and impregnated carbon filters present in General Air Filters make them stand out from the rest of its competitors. They are long lasting and can hold great amounts of dust and other harmful particles that are present in the indoor environment. The brand is known for its high performance in the industry of cooling and heating systems. General filters can last up to 6 months and should be replaced after that for better air quality.

General Filter Specs

What you need to know about your General Air Filter

  • Actual Filter Size Vs Nominal Filter Size - (Why this is so important)
  • Filter MERV Ratings - (What is the difference and how does it apply to you?)                              
  • Filter Quality Standards - (Know how to spot a cheap inefficient product)
  • What is your filters model number - (They sure made this a confusing topic but we made it simple) 

General Filter Dimensions

It works like this

The General Filter System comes in various sizes that are described in two ways.

  • Nominal Filter Dimensions - This is equal to the actual dimensions rounded up or sometimes down
  • Actual Filter Dimensions - These are the actual filter dimensions if you were to use a measuring tape and manually measure the filter.


General Filter Sizes

General Air Filter 20x25x5 | 0

Why is double checking your filters actual dimensions so important?

Because people accidentally order the wrong Filter Size all the time and it is not their fault.

Air filter manufacturers did not make cross referencing filter sizes easy and when the wrong size is ordered, the filter will not fit in your General Filter Housing, or General Filter Box.

Furnace Filter Depot Online Store

Welcome to Furnace Filter Depot's online store.

Furnace Filter Depot in Orlando, Florida, offers the best in furnace filters and HVAC filters to improve your home's air quality. We offer a wide selection of air filters for furnaces, heating systems, and air-conditioning systems of every variety. We have been distributing air filters for HVAC systems across the country since 1974.

Please feel free to contact us if you have questions about our products, or if you are looking for something specific. Call us today at (786) 310-4863 or email us at