Cleaning vs. Changing Air Filters?


Mark J
 Share

Recommended Posts

Doing a belated spring cleaning and have gotten to the Jet air filtration system.  I find it difficult to judge the condition of the air filters just by eye.  In fact for the home HVAC I change the filter according to the calendar, but that gets reasonably consistent utilization over time. 

With the workshop air filters it seems to be considered a sin to change these out unless the airflow is actually visibly diminished.  

I'm looking at my AFS filters and the pre-filter looks pretty filled, while the fine filter looks meh.  But the airflow seems fine.

20210914_144024.thumb.jpg.5516e43f2b30db76f161a98362ec5a89.jpg

20210914_144037.thumb.jpg.7799caee4884f725a2f7bde90ddb49c7.jpg

20210914_144124.thumb.jpg.58a05b701e806392f07c7e2987d47c65.jpg

20210914_144133.thumb.jpg.4b1dfabf1b539a342c4c335e966f5334.jpg

So when do you say a filter is in need of cleaning or replacement?  And do you blow it out or replace it?  How many times can you blow out a filter, anyway?

Link to comment
Share on other sites

17 minutes ago, Tpt life said:

Typical wisdom is that modern filters fail from loading more frequently than from anything else. This approach means you need to figure a flow rate at which you fail the filter. 

Not really sure how I would make that assessment.  All I can say is that a goodly bit of air comes out the blow side and a seemingly similar amount goes in the suck side.  

So is it safe to say that particulates will not "work their way through" a loaded filter, but rather the filter will just stop passing air?

26 minutes ago, Chestnut said:

I'd give it a light blow out once and then address replacement cost. I can't remember how much those filters cost but I remember it not being too much.

I bought a set of replacements when I ordered the AFS.  Price tags say about $75 for the two of them.  Seems like a lot, but I probably spend more than that on HVAC filters.  And I've been running these AFS filters for going on 4 years.  The pre-filter has been cleaned 2 or 3 times before today, but the fine filter doesn't lend itself to being blown off.

Link to comment
Share on other sites

Flow would be measured in a cfm measure at the inflow gate. As the filter loads, it clogs to such a place that not enough air will move to clear fines. You can get air flow meters you can hold in the inflow at your tools. Not sure the calculations each might require. 

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

 Share

  • Who's Online   3 Members, 0 Anonymous, 162 Guests (See full list)

  • Forum Statistics

    29.8k
    Total Topics
    405.1k
    Total Posts
  • Member Statistics

    22498
    Total Members
    3644
    Most Online
    ekatz
    Newest Member
    ekatz
    Joined