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Deal.ai › K&N › Filters

K&N

K&N 20x24x1 AC Furnace Air Filter, Merv 11

K&N 20x24x1 AC Furnace Air Filter, Merv 11

Best price now

$59.99at Lowe'sObserved at 10:33 PM

Compared across 4 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.

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Our take on the K&N 20x24x1 AC Furnace Air Filter, Merv 11

The K&N 20x24x1 is a washable, reusable furnace and AC filter rated MERV 11, so it traps fine dust, pollen and mold spores without the monthly replacement cost of disposable filters. Its aluminum frame and pleated synthetic media are built to be rinsed and reused for years. At $59.99 at Lowe's as of November 7, 2026, it sits at the low end of its recent price range across the four stores that carry it.

Best forHomeowners tired of buying disposable filters monthlyHouseholds with allergies or petsCentral AC and furnace systems taking 20x24x1 filtersPeople who want a lower long-term filter cost

Pros

Washable and reusable, so no monthly filter purchases
MERV 11 captures fine dust, pollen and mold spores
Sturdy aluminum frame holds its shape through cleaning
Pays for itself after roughly a year of disposable filters
Exact 20x24x1 fit for standard filter slots

Cons

Higher upfront cost than a single disposable filter
Needs rinsing every few weeks to keep airflow up
Not HEPA-level filtration for smoke or fine particles
Wet media must dry fully before reinstalling

K&N 20x24x1 AC Furnace Air Filter, Merv 11 prices at every store

Lowe'sNew
In stock
$59.99Free shippingObserved at 10:33 PM
Visit Lowe's
Tractor Supply CoNew
In stock
$62.99Free shippingObserved at 10:33 PM
Visit Tractor Supply Co
TWISTNew
In stock
$54.12+ $12.45 shippingObserved at 10:33 PM
Visit TWIST
The Twister GroupNew
In stock
$54.12+ $12.45 shippingObserved at 10:33 PM
Visit The Twister Group

Store links may earn us a commission. Some prices via Klarna.

K&N 20x24x1 AC Furnace Air Filter, Merv 11 price history

Lowest price we've seen: $54.12 on Nov 8 at TWIST. Tracked across 4 stores since Nov 8.

What reviewers say

Owners generally like the build quality and the savings from reusing one filter. Some find the cleaning routine more work than expected and notice reduced airflow when the filter is dirty.

What people mention

BuildPraisedOwners say the aluminum frame is rigid and lasts through repeated washings.
FiltrationPraisedUsers report less dust settling on surfaces after installing it.
MaintenanceMixedRinsing is simple, but the every-few-weeks schedule is more work than disposables.
AirflowCriticisedSome notice weaker airflow once the filter has collected dust.
CostMixedBuyers like the long-term savings but balk at the upfront price.

Specifications

Width ("): 20.0Source
Quantity (pcs): 1Source
Filter Type: Dust FilterSource

Questions and answers

Is this filter really reusable?: Yes. The pleated media and aluminum frame are designed to be rinsed and reinstalled. Let it dry completely before putting it back in the slot.
How often should I clean it?: K&N recommends rinsing it every few weeks to a few months depending on dust and pets. Check it monthly and clean when visibly loaded.
Will MERV 11 restrict airflow in my system?: MERV 11 is a mid-range rating that most residential blowers handle. A clean filter flows well; a dirty one will cut airflow, so keep up with cleaning.
Does it fit a standard 20x24x1 slot?: Yes, it is a nominal 20x24x1 filter. Measure your slot and check the actual dimensions on the frame, since nominal and actual sizes can differ slightly.
Is $59.99 a good price?: That is the best new price among the four stores carrying it as of November 7, 2026, and it sits at the low end of its recent range.
How does it compare with a disposable MERV 11 filter?: It filters similarly but costs more upfront. It wins on long-term cost if you keep it clean and reuse it for a year or more.
Where is the K&N 20x24x1 AC Furnace Air Filter, Merv 11 cheapest?: At Lowe's, for $59.99, as of our latest check.
Where can I buy the K&N 20x24x1 AC Furnace Air Filter, Merv 11?: 4 stores we checked sell it, including TWIST, The Twister Group, Lowe's, Tractor Supply Co.

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Stores we've priced the K&N 20x24x1 AC Furnace Air Filter, Merv 11 at

Lowe's deals and prices

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