What are your business hours?
We are here to serve you from 7AM to 4PM PST Monday thru Friday. Voicemail and Email are on 24 hours a day 7 days a week and we check them at least four times a day.

Do you make replacement filters?
Yes, we can make almost any type of filter for which you may need a replacement.

Is the number on my filter the part number?
It might be if it is preceded by P/N, otherwise it is probably the UL file number for the manufacturer.

How do I measure my filter?
Filters are three-dimensional.  Their size is the outside dimension of their length, width, and thickness.

What is the actual size of a nominal size filter?
We grew up believing the actual size of a nominal size filter is ½” less than the nominal size.  For example a 20 x 20 x 1 nominal would be 19 ½ x 19 ½ x 7/8.  In fact there are many different nominals, ½, 3/8, 1/8 etc…  If you are calling out a nominal size it is better to let us know if you expect something other than ½” off your size.

How do I describe the frame I need?
We need three dimensions, because we roll u-channel.  A typical channel is our 3/8, which has dimensions of 3/8 x 3/8 x 3/8.

What is the active face area of my filter?
Many of us believed that this area was the open area of the filter face not covered by the frame lip.  Recent testing has shown that air is like water and tends to flow to the path of least resistance.  This means that the air will flow under the frame lip and pass through the media making the entire media pad the active face area.

Do you make automotive air filters?
We make special application air filters, but not engine, oil, or water filters.  At this time…

Do you have a minimum charge?
We do not.  However, some of the outside processes,  like plating do carry minimum charges.

How long does it take to get our quote?
We try to get quotes out the same day.  In some cases we need to get pricing from outside venders, which may slow the process.

What is the difference between UL900 and UL94?
We hear this one quite often. The main difference is, that UL900 is the flammability test for air filters and UL94 the flammability test for sheet plastic.  We would be happy to discuss it further if you would like to give us a call.

What do you mean by “media”?
Media is the name given to the filtration material in a filter.

What if we want a filter which combines more than one filter media?
This is where The Filter Factory rises above the crowd; we welcome the opportunity to develop a special application filter specifically for your needs.  The filter types we offer are there as a starting point in the filter design process.

Can you do air filter testing?
We can do air flow testing, but efficiency testing is only done on our H.E.P.A. filters.  The rest of our filters need to be tested in an outside lab to obtain accurate efficiency values.