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DiscountFurnaceFilter.com Frequently Asked Questions

If you have a question and don't see the answer here, please contact our Support Team!


What is a MERV (MPR) rating for my filter?

What do you mean by Efficiency Rating for filters?

What will happen if I accidentally order the wrong size filter?

What will happen if I accidentally order the wrong brand filter?

What will happen if my package is damaged during shipping?

How do I use a coupon code on the website?

On the purchase of 2 packs, is there any extra discount available?

How do I decide which furnace filter is right for my home?

Do you have Lennox furnace filters of all sizes? I am looking for a Lennox X0586 furnace filter with size 20" x 25" x 5".

What is the life expectancy of my Aprilaire filter?

Why do I need to change my air filter?

How do I know the dimensions of my filter?

Why should I use a high efficiency air filter instead of a less expensive fiberglass filter?

Will I save money using a more efficient filter or is it better to use cheap filters and get them replaced more often?

What does it mean if my filter has a MERV 13 rating?

Who will install my Lennox X6670 filter if I purchase it from you?

I need urgent delivery of the Lennox X6675 replacement filter outside the US. Is that possible?

Are any discounts available on bulk orders of the Lennox X6673?

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