Return to the Heating & Air Conditioning Forum | Post a Follow-Up

1 inch vs. 4 inch media

Posted by mike_home (My Page) on
Sat, Mar 14, 09 at 12:54

I have started getting quotes to replace my furnaces and condensers. I am looking at the Carrier Infinity ICS variable speed furnace with the Infinity 17 condenser. My set up is two zone for a two story house (2 independent furnaces/condsensers).

The first company suggested going with a 1 inch media filter. Other companies are saying they always use a 4 inch media. The last company is saying the Carrier filter compartment can hold either a 1 inch or 4 inch filter.

Here are my questions:

Would I be making a mistake going with a 1 inch filter?
I realize the 1 inch will create greater static pressure, but won't the Infinity controller compensate for this?
Does the Infinity furnace come with the 4 inch media box?
If it does, why would an installer bother to create a duct to house a 1 inch filter?
I understand the 4 inch filter may require a yearly change versus a 3-4 time change with a 1 inch. Will the cost of the filters be about the same?

Follow-Up Postings:

RE: 1 inch vs. 4 inch media

I believe that the Carrier filters are proprietary and a bit pricey.

Their filter housings MAY be an option. If you're not tied into it, I would opt for a 4" filter such as an Aprilaire or other. The replacements are available from numerous sources and there are generic equivalents, if you are so inclined.


RE: 1 inch vs. 4 inch media

I bent the tabs in on my filter holder so it would hold a 4" filter instead of just a 1". I think it gives a bunch more surface area of filter media which should help lower the static pressure. I could hear it build suction as I slid the new 1" filters in place when new and it was horrible after a month and no one here smokes and we don't burn candles. I slid the 4" filter in and could barely hear any change in the air noise. I still do not see waiting a year to change it like the wrap said, that is nuts. I think 4 months is a good interval and go from there.
If you can make a 4" filter fit I would sure do it, especially if the filter media is pleated.

 o Post a Follow-Up

Please Note: Only registered members are able to post messages to this forum.

    If you are a member, please log in.

    If you aren't yet a member, join now!

Return to the Heating & Air Conditioning Forum

Information about Posting

  • You must be logged in to post a message. Once you are logged in, a posting window will appear at the bottom of the messages. If you are not a member, please register for an account.
  • Please review our Rules of Play before posting.
  • Posting is a two-step process. Once you have composed your message, you will be taken to the preview page. You will then have a chance to review your post, make changes and upload photos.
  • After posting your message, you may need to refresh the forum page in order to see it.
  • Before posting copyrighted material, please read about Copyright and Fair Use.
  • We have a strict no-advertising policy!
  • If you would like to practice posting or uploading photos, please visit our Test forum.
  • If you need assistance, please Contact Us and we will be happy to help.

Learn more about in-text links on this page here