How to Buy Air Filters for Air Conditioning & Heating Systems

Where to buy air conditioner or heating furnace air filters: product sources, recommendations, air filter types & efficiency choices.

Sources of HVAC Air Filters, High Efficiency Filters, Gasketed Air Filters, and Air Filter Manufacturers

• Local HVAC Suppliers
  
  such as your plumbing and heating parts supplier or building supply stores such as Home Depot or Lowes or Menards all carry a range of common air filter types and sizes.
• Online vendors of HVAC supplies
  
  can deliver air filters including both common and specialty or odd sizes.
• Filtration Manufacturing Inc.
  
  in Alabama, are a manufacturer/distributor of air filters. They have a wide selection of air filters (air filtration products) and air purification products. This company can also manufacture and deliver quickly air filters made to custom dimensions.
  
  Filtration Manufacturing Inc. company has paid particular attention to air filters that don't leak or bypass air at their mounting location. Their website http://www.filtrationmanufacturing.com/ offers less discussion about filter composition materials than those who are concerned with filter fiber shedding or filter composition.
• Global Filter Source,
  
  is a supplier of for non-fiberglass filters such as their polypropylene filter with a supporting grid of wire and cardboard. Contact Global Filter 877-844-3293 offers "healthy home" filters and a MERV 11 pleated furnace filter. Website: http://www.healthyhomefilters.com/
• List your product here:
  
  manufacturers or suppliers of air filters and air filtration equipment are welcome to Contact us to add product listings here - there is no listing cost (we reserve the right to add or remove product listings from our web pages) T
  

Before calling or ordering an air filter online, remember to measure and write down the dimensions of the filters you are replacing in order to order the correct air filter size.

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Other air filtration methods besides air filters

Beyond mechanical filtration methods using high MERV or HEPA rated air filters we've discussed above are other methods that can reduce airborne particle levels:

• Electrostatic air cleaners
  
  have been in use on HVAC systems for decades as highly efficient "air filters".
  
  These devices use an electrical charge on metal blades or plates and an electrical charge of opposite polarity on wires between the plates to cause particles in air moving past the wires to become "charged" and to stick to the surface of the metal plates or blades in the air cleaner.
  
  These electrostatic precipitators may also actually oxidize particles as well.
• Ultraviolet light
  
   (photo catalytic oxidation) is used in some air handling or duct systems, claiming to kill 99.95 of bacteria and viruses. While Wikipedia claims that independent research has confirmed this claim, we are very skeptical. For UV light to work as a sterilizer we need sufficient contact time.
  
  We are doubtful that little particles zooming along in the air path get enough time in the UV light to be effectively neutralized.
  
  However the surfaces in the duct or air handler system which are exposed to this light are almost certainly being treated effectively. We'd like to see this approach tested in duct systems where condensate splash-by is at risk of wetting duct surfaces and at risk of a concomitant mold growth problem in that location.
• Charcoal or activated carbon air filters
  
  provide a porous material that can remove small particles along with some volatile organic compounds (VOC's). These are normally used together with a HEPA filtration system.
• "Air purifiers" or ionizers
  
  that charge their internal electrical surfaces and cause airborne particles to stick to a collector plate are a currently popular (2006) product which in our opinion are of limited actual effectiveness unless used in a small, clean, enclosed space.
  
  These devices do not move enough cubic feet per minute (CFM) of air to be effective in a large open space.
• "Air cleaners or purifiers" which use ozone,
  
  or "ozone generators" have been proposed as air cleaners and as "mold killers" by the manufacturers of these products.
  
  Ozone is a powerful oxidizer and it may also cause airborne particles to become electrically charged and to plate out on building surfaces. They are used effectively to reduce airborne smoke and they're used in some medical applications or facilities.
  
  Some other "air purifiers" may also generate (un-wanted) ozone levels in a building. But ozone generators can themselves be an IAQ problem source if they produce high levels (over 0.05 ppm) of ozone in indoor air.
  
  And as a "mold remediation" or mold cure ozone generators are junk science which fails to properly remove the problem mold and fails to correct its cause.
  
  We discuss the use of ozone generators in detail
  
  at The Use of Ozone Generators Indoors for Control for Odors and Mold Removal in buildings: A Summary of HAZARDS & FALSE CLAIMS.

Filter size for york ac model n2ahd14a06c - On 2023-05-16 by Steve

Reply by InspectApedia DF (mod) - Filter size for York AC model n2ahd14a06c

@Steve,

I'm not sure that that number is the model number as it's a different format than usual - that may be a serial number. Take a look at our York manuals page here:

YORK HVAC AGE, MANUALS, PARTS

where you may find the correct manual. If not, there is also contact information for York to contact them for the filter size also. Often, the filter size will be a readily available size used for many models.

First though would be to check your owner's manual for your unit if you have it.

And if you can give us the model number or if we find the information you ask, we'll add that here.

Interestingly a review of several York HVAC manuals finds that the manufacturer doesn't give air filter sizes - just type. options, perhaps because of variation in cabinet size among models.

Usually we can simply use a tape measure to get the length and width and maximum thickness of the air filter - just open the air handler door to show the filter slot or mounting brackets.

If you've not already found where the air filter mounts on your system:

Watch out: in some HVAC systems there is NO air filter in the air handler itself. Rather the filter may be at a central air return or at multiple air returns.

See

AIR FILTERS for HVAC SYSTEMS

and more details at

AIR FILTER LOCATION

...

...

Continue reading at AIR FILTERS for HVAC SYSTEMS or select a topic from the closely-related articles below, or see the complete ARTICLE INDEX.

Or see these

Recommended Articles

• AIR FILTER LOCATION.
• AIR FILTER CLEANER EFFECTIVENESS
• AIR FILTERS, OPTIMUM INDOOR
• AIR FILTERS for HVAC SYSTEMS - home
• AIR FLOW TOO WEAK.
• DUCTWORK MOLD CONTAMINATION
• DIRTY AIR FILTER PROBLEMS
• MISSING or LEAKY AIR FILTERS
• SOURCES FOR AIR FILTERS - suppliers

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SOURCES FOR AIR FILTERS at InspectApedia.com - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.

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INDEX to RELATED ARTICLES: ARTICLE INDEX to BUILDING INDOOR AIR QUALITY IAQ

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