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HVAC Air Filters

Old 06-06-2018, 07:18 AM
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Default HVAC Air Filters

I'm in a new house that has several return filters instead of one central filter. One 18x24 and five 12x12. I just replaced the cheap filters that came in the house with some pleated filters. The pleated filters are substantially louder and there's a clunk each time the system turns off or on due to the movement of the cardboard frame. They are the cheapest pleated filters from Lowes, not the super high quality ones.

What are you guys using that you are happy with? I plan on being in this house forever, so I want to take care of the system.
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Old 06-06-2018, 07:29 AM
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Why not put a little rubber weatherstripping into the frame so that your filters don’t move?
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Old 06-06-2018, 07:32 AM
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Originally Posted by Flot View Post
Why not put a little rubber weatherstripping into the frame so that your filters don’t move?
I can do that and may have to, but the sound of moving air is substantially louder in these new filters. I was hoping to fix both problems with a different filter.
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Old 06-06-2018, 09:52 AM
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I use cheapest filters you can get for the most part. More air moving through and less strain on my equip.
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Old 06-06-2018, 09:55 AM
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What we use too. The cheap green ones. I think ‘flanders’ is the brand.
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Old 06-06-2018, 06:34 PM
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Originally Posted by Obvious View Post
I'm in a new house that has several return filters instead of one central filter. One 18x24 and five 12x12. I just replaced the cheap filters that came in the house with some pleated filters. The pleated filters are substantially louder and there's a clunk each time the system turns off or on due to the movement of the cardboard frame. They are the cheapest pleated filters from Lowes, not the super high quality ones.

What are you guys using that you are happy with? I plan on being in this house forever, so I want to take care of the system.
stay with the pleated mid grade from lowes or homedeopt bout 9us apiece, install and then tape all around perimeter of filter with blue painters tape. the air flow you hear is around the perimeter of the filter and the Cluck you hear is the filter getting sucked up tight to the duct when your unit cycles. DO NOT use the cheap blue see thru filters.
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Old 06-06-2018, 06:36 PM
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if the system is not designed for pleated filters, meaning returns oversized by 20% you are gong to here noise and also put a strain on the system. even though there are 6 returns, the flex or hardpipe going to them might be on the smaller side when adding up the amount of CFMs running through them.
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Old 06-06-2018, 06:42 PM
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Originally Posted by schoolsout1 View Post
I use cheapest filters you can get for the most part. More air moving through and less strain on my equip.
ditto on that.

Have heard it from multiple hvac guys too. Change em frequently in summer, two weeks or so.
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Old 06-06-2018, 08:12 PM
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I spent some time in Lowe’s looking for filters for my new house after hearing loud air noise.

I’d have to go back for pics but some of the mid to mid upper filtrete filters actually had higher cfm then the crappy blue ones.
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Old 06-06-2018, 10:26 PM
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The best thing that ever happened to the hvac business is big box stores selling air filters. Why, they destroy more ac systems than anyone or anything. A pleated filter is the worst thing you can put on your system unless it has been designed to handle the additional pressure it causes on your system.

The best air filter you can use is the washable/ cut to size media type filter. They do a decent job of filteration with the least pressure drop. If you are dead set on pleated filters, the high performance pleated filters have the least amount of pressure drop compared to the cheap ones. Think surface area, the cheap pleat has about 20 channels going across a 20x20 filter. The high performance may have 40 channels across same size filter. If you took the filter out of the frame it would be a larger filter. Surface area matters.

If you want to run high performance filters, your duct system needs to be properly sized. If air noise can be heard through your return air grills, the duct system is undersized now for the size of unit. A properly designed system should be felt never heard.
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Old 06-08-2018, 01:18 PM
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Thanks for the replies. The builder himself told me to use pleated filters during our walkthrough. The HVAC company had installed the cheapo ones, so I'm not sure what it was sized for.
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Old 06-08-2018, 02:51 PM
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Originally Posted by schoolsout1 View Post
I use cheapest filters you can get for the most part. More air moving through and less strain on my equip.
^^^ This x10!

The green multipack wallyworld elcheapos are the best on your AC! If you get a lil more dust then hand your wife some pledge and dust rags.

I've gotta old school AC guy (certified AC but can fix ANYTHING you plug into the wall and most other things you cant) and he's a one man show, fixes HVAC, Frig/Freezers, icemakers etc.... does it for home and commercial and everyone around has him on speed dial. He stays swamped because he FIXES stuff instead of charging you $100 to come out and tell you that you need new unit. I have a 25 year old home, 4500sqft. Downstairs AC finally took a dump 3yrs ago, I replaced with a new unit, biggest home unit they make. He services that and still nurses the original upstairs unit, it still kickin. Might live another few years, might keel over tonight, who knows. But he's adamant about the cheap filters. Says the new anti-allergy, super duper, CA leaf licking, salamander saving, yada yada yada filters are a racket and only overwork your unit and lead to a premature death. AC is all about airflow! Just replace the cheap ones monthly, hose out the AC unit outside once a month during use and keep the freon/lube levels checked and your golden!

Despite what the "industry" wants to tell you and sell you, it aint rocket science.
back at it likes this.
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Old 06-08-2018, 03:26 PM
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so we have different opinions
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