How Do I Measure a Filter?

Method 1: If you currently have a throw-away fiberglass air filter, take the size
written on your existing air filter and deduct 1/4 inch from both sides. For
example, if your throw away filter is: 20 X 20, then you would order
19 3/4 X 19 3/4 actual dimension. However, some times you must deduct
1/2 inch, so I recommend you confirm by going to method 2 below. Sometimes
what is written on the frame is what the filter actually measures, sometimes it
is not. The point is, you cannot trust what is written on the frame.

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Method 2: Actually measure your existing air filter, but be sure that your existing

filter fits well.

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Method 3: Measure the opening provided for the air filter in your furnace, ceiling

filter grill, or wall filter grill and deduct 1/4 inch from both sides. For example, if

the opening provided for the filter in your furnace measures 18 X 20, then you

would order 17 3/4 X 19 3/4.

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Method 4: Look up the model number of the filter housing, or the part number of

the existing filter.

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How do I Cancel my Order?

1. Log into your account.
2. Click: Change quantities / cancel orders
3. Click: View or Change order
4. Click: Need to change quantities or edit an Item
5. Change Quantity to, Zero
6. Click: Save Changes

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What is The Meaning of MERV Ratings?

Simply stated, The purpose of MERV ratings is so that you can
compare the efficiency of air filters. The higher the MERV rating,
the better the filter is in capturing pollutants and contaminants.
For instance, a MERV 11 is more efficient than a MERV 8.