What was the lowest Amazon price in the 90 days before this check?

$161.68. At our check on Oct 4, 2026, the price was $161.68.

What does the “typical” price on this page mean?

It is the time-weighted average of Amazon’s own price over the 90 days before our check: $283.58. The median was $283.49.

How often does the price change?

Amazon changed it 23 times in the 90 days before our check, about 7.7 times a month.

Is this still the price today?

Not necessarily. We recorded $161.68 on Oct 4, 2026. Amazon sets the current price, which the listing and checkout show.

Past check

Originally checked Oct 4, 2026, 5:55 PM PDT

Archived verification record

Nordic Pure 18x20x1 Pleated MERV 13 Plus Carbon Air

Nordic Pure

Researched variant · 18x20x1

Photo from the Amazon listing

Research receiptASIN B0FRFHTVSYArchived check

Direct answer

Was this a good price?

At Oct 4, 2026, 5:55 PM PDT, yes. This exact variant passed our privately measured price-history threshold. That verification window has expired, so this page does not claim the current offer is still a deal.

$16168

Typical ~~$283.58~~

43% off Save $121.90

Lowest price in 90 days

Price checked Oct 4, 5:55 PM PDT

Tracked below its usual 90-day Amazon price in Tools & Home Improvement.

See current listing on AmazonSee on Amazon

As an Amazon Associate I earn from qualifying purchases. Amazon sets the price and availability you see after clicking.

90-day price history

Amazon price
Typical $283.58
Low $161.68

Amazon price over the 90 days before our check: high $349.99, low $161.68, typical $283.58, $161.68 when checked.

Read the chart

What the 90-day history shows

At our check on Oct 4, 2026, Amazon’s own price was $161.68. In the 90 days before that, it ranged from $161.68 to $349.99.
The time-weighted average (the “typical” price) was $283.58; the median, the price it sat at or below half the time, was $283.49.
It was at or below $161.68 for 1 day of the 90 days Amazon listed a price.
It had been at or below this price since Oct 4, 2026. Before that, it was not this low at any other point in the window.
Amazon changed the price 23 times in that window, about 7.7 times a month.

Rule-based answer

Was it a good time to buy?

Yes. At our check this was one of the best prices in the last 90 days.

It matched or beat every Amazon price in the 90 days before the check.
It was at or below this price for only 1 day of 90.
It was 43% below its median price of $283.49.

This check has expired, so treat it as history, not today’s price.

Evidence sheet

What cleared the gate?

The exact ASIN and variant matched the research receipt.
The offer beat our private recent-history threshold at the timestamp above.
The evidence was fresh when this check was approved.
A human approved the product and wording before publication.

Before checkout

What should you check now?

Confirm the size, color, seller, shipping and current total on Amazon before buying.

For Tools & Home Improvement, also confirm on the listing:

Size, fit, or compatibility with what you already own, as the listing states it.
What is included at this price (pieces, accessories, hardware).
Who honors the warranty, and the return window for the seller shown at checkout.

Amazon’s checkout total—not this page—is the current source of truth.