[NEW, SnS] $13.39 | Filtrete 24x24x1 Air Filter, MERV 13, MPR 1900, 2 HVAC Filters at Amazon

Sirmixpix

Jul 26, 2026 4:57 PM

1.4K Comments

Joined Apr 2015

SirmixpixJul 26, 2026 4:57 PM

1.4K Comments

Anything much over a merv8 is really restricting airflow, especially on a 1in filter. 2in and thicker filters provide more surface area which can help to mitigate restricted airflow from hvac filters. Realistically though, you don't need higher than merv8. Try not to rely on your hvac to be an air filter for your home. It's not meant to do that. The filters on your hvac are really meant to just keep your coils/fins clear of debris and dust so heat energy can more readily be taken from the air inside to be expelled outside as it passes through over the fins.
Clean air in the home should be accomplished through other means, like buying a separate hepa filtration unit and keep in the main room(s). The bedroom in particular. While that may seem expensive to do, depending on what you get, you will actually have better air filtration this way and your hvac blowers will likely last longer and your home cooling more efficiently. Those savings in equipment cost and electricity, and better cooling, end up being more than the cost of the hepa filter or two in main room(s) over the life span of the hvac system.

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Mr-Blister

Jul 27, 2026 3:55 PM

402 Comments

Joined Dec 2007

Mr-BlisterJul 27, 2026 3:55 PM

402 Comments

Quote from Sirmixpix

:

Anything much over a merv8 is really restricting airflow, especially on a 1in filter. 2in and thicker filters provide more surface area which can help to mitigate restricted airflow from hvac filters. Realistically though, you don't need higher than merv8. Try not to rely on your hvac to be an air filter for your home. It's not meant to do that. The filters on your hvac are really meant to just keep your coils/fins clear of debris and dust so heat energy can more readily be taken from the air inside to be expelled outside as it passes through over the fins.
Clean air in the home should be accomplished through other means, like buying a separate hepa filtration unit and keep in the main room(s). The bedroom in particular. While that may seem expensive to do, depending on what you get, you will actually have better air filtration this way and your hvac blowers will likely last longer and your home cooling more efficiently. Those savings in equipment cost and electricity, and better cooling, end up being more than the cost of the hepa filter or two in main room(s) over the life span of the hvac system.

I buy these MERV13 filters for the custom air purifiers I make for my home using 140mm PC fans. I agree that a higher MERV rating in your HVAC is causing it to work really hard

1

NavyCatfish8868

Jul 27, 2026 9:00 PM

86 Comments

Joined Sep 2021

NavyCatfish8868Jul 27, 2026 9:00 PM

86 Comments

good deal for the money, thanks

PH3N1X

Jul 28, 2026 1:16 PM

378 Comments

Joined Aug 2011

PH3N1XJul 28, 2026 1:16 PM

378 Comments

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When the Merv argument comes up I always post this. the Merv 13 filter more than a Merv 8 and does not hamper airflow due to the amount of pleats. https://www.youtube.com/watch?v=R...a58&t=213s

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mrbrucermurray

Jul 30, 2026 3:08 PM

912 Comments

Joined Oct 2009

mrbrucermurrayJul 30, 2026 3:08 PM

912 Comments

got 3 for 20$ HDX came yesterday

[NEW, SnS] $13.39 | Filtrete 24x24x1 Air Filter, MERV 13, MPR 1900, 2 HVAC Filters at Amazon

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