$29.38: Aerostar 16.5x21.5x1 MERV 8 HVAC Furnace & Air Conditioner Filters (6 Count)

ThePublisher

Jul 4, 2026 5:22 PM

635 Comments

Joined Jun 2017

ThePublisherJul 4, 2026 5:22 PM

635 Comments

You're putting a lot of stress on your HVAC system using a filter that is too "good".
Better off with an in-home air filter and using the cheap filters for your HVAC so it can work easier.

6

1

cbslc

Jul 4, 2026 8:03 PM

363 Comments

Joined Aug 2011

cbslcJul 4, 2026 8:03 PM

363 Comments

My mom's AC line was freezing up and house wasn't getting cool. The culprit- high MERV filters like this that are too restricting.

TealMorning759

Jul 4, 2026 8:33 PM

58 Comments

Joined Jan 2023

TealMorning759Jul 4, 2026 8:33 PM

58 Comments

MERV 8 isn't a high filtering... Filter. For homes with pets or lots of activity, MERV 8 is a really good choice. Change monthly and it'll be fine. MERV 8 is the highest rated filter before there's considerable air restriction. MERV 5 tends to be fine for people without any crazy allergy issues and not a dusty environment.

1

BlueMallard431

Jul 4, 2026 11:04 PM

140 Comments

Joined Jul 2020

BlueMallard431Jul 4, 2026 11:04 PM

140 Comments

Quote from cbslc

:

My mom's AC line was freezing up and house wasn't getting cool. The culprit- high MERV filters like this that are too restricting.

From a Merv 8? Changed monthly?

dcmanryan

Jul 5, 2026 4:58 PM

5.3K Comments

Joined Feb 2009

dcmanryanJul 5, 2026 4:58 PM

5.3K Comments

Quote from cbslc

:

My mom's AC line was freezing up and house wasn't getting cool. The culprit- high MERV filters like this that are too restricting.

If your Mom's AC was icing up with a MERV 8 like in this deal she has bigger issues. A MERV 8 works well in even older systems that never had AC and it was added later.

1

jrootmsu

Jul 5, 2026 11:06 PM

84 Comments

Joined Feb 2018

jrootmsuJul 5, 2026 11:06 PM

84 Comments

Quote from dcmanryan

:

If your Mom's AC was icing up with a MERV 8 like in this deal she has bigger issues. A MERV 8 works well in even older systems that never had AC and it was added later.

Seriously. MERV 8 isn't that high of a MERV #.

cbslc

Jul 9, 2026 1:46 AM

363 Comments

Joined Aug 2011

cbslcJul 9, 2026 1:46 AM

363 Comments

Quote from dcmanryan

:

If your Mom's AC was icing up with a MERV 8 like in this deal she has bigger issues. A MERV 8 works well in even older systems that never had AC and it was added later.

I felt the same way, but 1 hour after replacing, the system started working again and that was 2 years ago. MERV 7 - from a reliable company is what we are using now.

$29.38: Aerostar 16.5x21.5x1 MERV 8 HVAC Furnace & Air Conditioner Filters (6 Count)

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