Frequently Asked Questions

General Questions:

Yes! Smith Filter specializes in oddball sizes that are hard to find. Prices are easy to figure in the price book by multiplying the square inches of the filter and finding it on the chart. If you have questions, our helpful staff would be happy to help.

Again, you have come to the right place! Smith Filter is set up to help those customers who only need small quantities of both stock sizes as well as special sizes. There is a minimum of $15 on all Smith orders. Special sized throwaway filters have a minimum order of 6 filters per size.

Yes you do. A Distributor’s Net Price Book was designed just for you. When requesting information, please indicate that you will be reselling the filters.

Very much so! Smith Filter keeps track of the competition’s pricing to keep our own filters in line. For large quantities, please contact our sales staff who will be willing to work with you for the best possible price available.

Yes you can! If you are interested in opening an account with Smith Filter, please indicate you need a Credit Application. Upon receiving your application and finding it acceptable, approval can be obtained within a couple days. Click here for Credit Application

VISA/MASTERCARD/DISCOVER and American Express are accepted at Smith Filter. C.O.D. is available as well as paying by check in advance.

Our return goods policy is as follows:

  • Credit for returns will be allowed only when authorized the Smith Filter’s Return Department
  • Standard products must be in resalable condition for credit to be allowed.
  • Nonstandard products ordered in error may not be returned for credit
  • Products returned resulting from a factory error: Full credit will be issued and sent back collect.
  • Standard products returned resulting from customer error must be shipped back prepaid freight and a 15% restocking charge assessed. All returned filters will be inspected to determine usability. If unacceptable, the value of that portion will be deducted from credit given.
  • No returns will be allowed on products bought more than 6 months before return date.
  • Credits are void after 6 months

Yes, all of our filters are made in the USA. Our plant is located in Moline, Illinois.

Yes, a majority of our filters are covered under our UL certifications. If you have questions about the certification of a specific filter, please contact us and we can provide that information.

Minimum efficiency reporting value, commonly known as MERV rating, is a measurement scale designed in 1987 by the American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) to rate the effectiveness of air filters. MERV values vary from 1 to 16. The higher the MERV value is the more efficient the filter will be in trapping airborne particles.

Learn more here.

Yes we do! We can fulfill orders for all of your HEPA needs. You can find our standard HEPA filters on our products page. If the filter you need is not listed on that page, please fill out one of the HEPA filter request forms with all of the specification of what you need, or contact our sales department.

Learn more about our HEPA products.

Permanent Filter Questions:

We do not recommend using a metal mesh style filter in a residential furnace application, because they are not a sufficient efficiency level. According to NAFA (National Air Filtration Association), the minimum efficiency rating for residential applications is MERV 6. Our pleated disposable filters are rated at MERV 8, and are designed for this application. The metal mesh washable style filters will be less efficient, normally rated at MERV 4, and are designed for other types of applications.

There are several ways to clean metal filters and will depend on the type of filter.

Metal Mesh Style:

  • They can be blown out with an air compressor.
  • They can be washed out with a hose or a pressure washer.
    • For foam type filters, make sure they are dry before installing them back in the application.
  • Soap and water or cleaning agents may be used in cases of excess grime or grease trapped on the filters.
    • Make sure that cleaning agents being used are compatible with the material of the filter.

Grease Baffle Style:

  • They can be washed out with a hose or a pressure washer.
  • They can be run through the dishwasher.
  • Soap and water or cleaning agents may be used in cases of excess grease trapped on the filters.
    • Make sure that cleaning agents being used are compatible with the material of the filter.

Yes, we recommend using filter spray with the metal mesh type filters. Adding a light layer of the filter spray on a new filter, and after every wash, will increase the initial dust holding capacity of the filter. You can find our filter spray on our products tab, or click here.

Type 430 steel is a less expensive grade of stainless steel that is somewhat difficult to form and weld. Type 304 steel is easier to form and weld than 430 stainless steel. Type 430 stainless steel is made up of 17 percent chromium and 0.12 percent carbon, while 304 stainless steel contains 18 percent chromium and 0.08 percent carbon. Type 430 stainless steel is ideal in the production of automotive trim, the insides of clothes dryers and dishwashers. Manufacturers use 304 stainless steel in the production of kitchen sinks, counter tops, food processing equipment and other equipment regularly exposed to corrosive environments.

Disposable Filter Questions:

According to NAFA (National Air Filtration Association), the minimum efficiency rating for residential applications is MERV 6. Our standard pleated filters are rated at MERV 8, and are designed for most furnace applications. If you have a newer geothermal unit, they can take higher efficiency filters. We make MERV 12 and MERV 13 pleated filters for these applications.

Yes, we carry bottlecap for backing on our disposable filters. The addition of bottlecap on the filters will depend on the type and sizing of the filter. It will be applied according to the following.

Standard Sizes:

  • Pleated Filters – will come with a die cut frame and will not have any bottlecap
  • Fiberglass & Polyester – 2” will have bottlecap on both sides. 1” will have a crimped frame and no bottlecap.

Special Sizes:

  • 1” – will have bottlecap on one side for sizes that are over 500 sq. /in.
  • 2” – all sizes will have bottlecap on one side, and both sides for sizes over 500 sq. /in.
  • 4” – (pleated filters only) – will have bottlecap on both sides for all sizes.

**Note: subject to change**