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frontpage Posted by 00dahc • Jan 15, 2025
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frontpage Posted by 00dahc • Jan 15, 2025

Costco Members: 2-Pack 3M Ultra Allergen Reduction 4" Deep Pleat HVAC Filters

+ Free Shipping

$30

$40

25% off
Costco Wholesale
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Deal Details
Costco Wholesale has for their Members: 2-Pack 3M Ultra Allergen Reduction 4" Deep Pleat HVAC Filters (Select Sizes) on sale for $29.99. Shipping is free.

Thanks to Community Member 00dahc for sharing this deal.

Available Sizes:
  • 20 x 25 x 4
  • 16 x 25 x 4
  • 16 x 20 x 4
  • 20 x 20 x 4

Editor's Notes

Written by SaltyOne | Staff
  • Rated 4.7 out of 5 stars from customer reviews.
  • $10 manufacturer's savings is valid 1/1/25 through 1/31/25. While supplies last. Limit 5 per member.

Original Post

Written by 00dahc
Community Notes
About the Poster
Deal Details
Community Notes
About the Poster
Costco Wholesale has for their Members: 2-Pack 3M Ultra Allergen Reduction 4" Deep Pleat HVAC Filters (Select Sizes) on sale for $29.99. Shipping is free.

Thanks to Community Member 00dahc for sharing this deal.

Available Sizes:
  • 20 x 25 x 4
  • 16 x 25 x 4
  • 16 x 20 x 4
  • 20 x 20 x 4

Editor's Notes

Written by SaltyOne | Staff
  • Rated 4.7 out of 5 stars from customer reviews.
  • $10 manufacturer's savings is valid 1/1/25 through 1/31/25. While supplies last. Limit 5 per member.

Original Post

Written by 00dahc

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Top Comments

JollyBorder2428
For the love of god people, stop blindly parroting that Higher MERV = Higher pressure or work for your HVAC blower motor / system.

That is an uninformed rule of thumb that in many times couldn't be further from the truth.

The biggest factor in static pressure or pressure drop for a filter is the surface area of the filter. Generally, more pleats = higher surface area, but filter depth and design is also part of the equation.

Don't believe me? Here is a link to a very in depth study proving this. Among 3M filter lineup, the filtrete 1900 MERV 13 performs the best, while the filtrete 600 MERV 7 has the highest pressure (tied with filtrete 2400 MERV 14).

They also tested a variety of filter manufactures across MERV ratings in 1" and 2" depth and confirmed there generally is no correlation between MERV ratings and pressure. The MERV 13 Rated filters actually provided the best performance, and generally the filter depth or number of pleats has been found to be highly correlated to HVAC pressure (thicker / more pleats = better).

With that said, there are also many exceptions to that rule and deviations not only between manufacturers but also between product offerings if the same manufacturer. However, what they did find is that the filters performed within the pressure drop ratings provided by the manufacturer for that filter.

Long story short, the most important thing is to find the rating of your HVAC system for Pressure drop vs CFM / airflow and ensure you are getting a filter that meets the design loads. Feel free to put in a HEPA filter as long as it meets your requirements.
https://efiling.energy.ca.gov/Get...ntId=27687
NaPra
What most people don't realize is that the purpose of the furnace filter is to keep the HVAC system clean from dust and other debris. It's not the job of the furnace filter to help with your allergies and the restrictive filters such as the one posted here are too tough on most of the household HVAC systems and could lead to premature component failures. If you're sensitive to airborne particles, use an appropriate air purifier.
LJCRST
And yet here I am buying this for the exact purpose of purifying my air in a corsi-rosenthal box.

47 Comments

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Jan 16, 2025
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Jan 16, 2025
NaPra
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This user is an Expert in Tech & Electronics
Jan 16, 2025
1,697 Posts

Our community has rated this post as helpful. If you agree, why not thank NaPra

What most people don't realize is that the purpose of the furnace filter is to keep the HVAC system clean from dust and other debris. It's not the job of the furnace filter to help with your allergies and the restrictive filters such as the one posted here are too tough on most of the household HVAC systems and could lead to premature component failures. If you're sensitive to airborne particles, use an appropriate air purifier.
3
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Jan 16, 2025
1,155 Posts
Joined Jun 2011
Jan 16, 2025
LJCRST
Jan 16, 2025
1,155 Posts

Our community has rated this post as helpful. If you agree, why not thank LJCRST

And yet here I am buying this for the exact purpose of purifying my air in a corsi-rosenthal box.
1
Jan 16, 2025
5 Posts
Joined Sep 2020
Jan 16, 2025
Mk21327
Jan 16, 2025
5 Posts
Thanks, in for a pack of these!
Jan 16, 2025
67 Posts
Joined Sep 2016
Jan 16, 2025
SammyWinchester
Jan 16, 2025
67 Posts

Our community has rated this post as helpful. If you agree, why not thank SammyWinchester

Quote from NaPra :
What most people don't realize is that the purpose of the furnace filter is to keep the HVAC system clean from dust and other debris. It's not the job of the furnace filter to help with your allergies and the restrictive filters such as the one posted here are too tough on most of the household HVAC systems and could lead to premature component failures. If you're sensitive to airborne particles, use an appropriate air purifier.

Or, built a DIY corsi-rosental box. Thank me later.
1
2
Jan 16, 2025
158 Posts
Joined Nov 2010
Jan 16, 2025
needtofinddeal
Jan 16, 2025
158 Posts
Is this the same price in-store?
Jan 16, 2025
40 Posts
Joined Jan 2018
Jan 16, 2025
Glock19Smith
Jan 16, 2025
40 Posts
Quote from LJCRST :
And yet here I am buying this for the exact purpose of purifying my air in a corsi-rosenthal box.

Great for anyone living near SoCal wildfires.
1
Jan 16, 2025
40 Posts
Joined Jan 2018
Jan 16, 2025
Glock19Smith
Jan 16, 2025
40 Posts
Quote from needtofinddeal :
Is this the same price in-store?

Not at my local warehouse. Online only for me

Sign up for a Slickdeals account to remove this ad.

Jan 16, 2025
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Joined Aug 2010
Jan 16, 2025
EngineerDude
Jan 16, 2025
1,307 Posts
Apparently the 1550 MPR rating is equivalent to a MERV rating of 12, just FYI
Jan 16, 2025
130 Posts
Joined Jan 2014
Jan 16, 2025
rocCity
Jan 16, 2025
130 Posts
MERV 12 is a bit high for my liking for the reasons mentioned earlier on the post. Anyone got recommendations on a Merv 7 or 8 filter?
Last edited by rocCity January 16, 2025 at 02:30 PM.
Jan 16, 2025
2,918 Posts
Joined Oct 2008
Jan 16, 2025
shjaythi
Jan 16, 2025
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Quote from rocCity :
MERV 12 is a bit high for my liking for the reasons mentioned earlier on the post. Anyone got recommendations on a Merv 7 or 8 filter?
Ace Hardware got 4 inch Merv 8 filter for $10.99 - https://www.acehardware.com/depar...rs/F001154
1