# Simply 18 × 18 × 1 MERV 8 Air Filters, 6-Pack

Simply Pack: Six pleated MERV 8 filters for residential air conditioners, furnaces, and heat pumps. Listed actual size is 17.75 × 17.75 × 0.75 inches; compare it with your filter slot before buying.

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- Market: US
- Language: en-US
- Currency: USD
- Brand: Simply
- Model: SF18x18x1 \(17.75 x 17.75\)M08-6PK
- Price: 35.97 USD
- Previous price: 39.97 USD
- Discount: 10%
- Price checked: 2026-11-09T16:00:57.370Z
- Rating: 4.7 / 5
- Ratings: 55420

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- The listing gives a nominal size of 18 × 18 × 1 inches and an actual size of 17.75 × 17.75 × 0.75 inches; use the actual measurements when checking slot fit.
- The pleated media is described as electrostatically charged synthetic material, with cardboard and paper also listed among the materials.
- The manufacturer describes the filter as capturing dust, mold, pet dander, and pollen; this is a listing claim, not an independently verified performance result.
- The manufacturer recommends replacement at intervals of up to three months and describes slide-in installation with attention to the airflow arrows.

## Pros

- A six-filter pack supplies multiple replacements for a system that uses this listed size.
- The listing specifies pleated media and a MERV 8 rating, giving buyers a clearly stated filtration class to compare with their system requirements.

## Specifications

### Identity
- Brand: Simply
- Model: SF18x18x1 \(17.75 x 17.75\)M08-6PK
- Filter rating: 8
### Dimensions and installation
- Actual listed dimensions: 17.75"L x 17.75"W x 0.75"Th
- Weight listed: 2 pounds
- Mounting type: Slide In
- Shape: Rectangular
- Compatible devices listed: Air Conditioner, Furnace, Heat Pump
- HVAC system type listed: residential
### Materials and construction
- Material listed: Cardboard, Electrostatically Charged Synthetic Pleated Media, Paper
- Construction listed: 24-Point Beverage Board, Hot-Rolled Steel Wire Mesh, Pleated
### Pack and use
- Common applications listed: Allergen Reduction, Breathable Fabric, Mold Reduction

## Before you buy

- The manufacturer says use may extend up to three months; treat that as a stated interval, not a guarantee that every home or HVAC system should use the same schedule.
- The nominal 18 × 18 × 1-inch size differs from the listed actual dimensions of 17.75 × 17.75 × 0.75 inches; customer feedback also reports mixed fit and size experiences, so compare the actual measurements with your slot.

## In the box

- 6 air filters (Included): Listed in the manufacturer's included-components field.
- Installation guide (Included): Listed in the manufacturer's included-components field.

## A good fit for

- A buyer whose residential air conditioner, furnace, or heat pump accepts a filter with the stated actual dimensions and calls for MERV 8.
- Someone who wants a multi-filter replacement pack rather than buying a single filter at a time.

## Less suited to

- A buyer whose system requires different actual dimensions or a different filtration rating; this listing specifies 17.75 × 17.75 × 0.75 inches and MERV 8.

## Customer feedback

Customer feedback is positive about filtration, functionality, quality, and value, and the summary reports that some customers find the filters effective on dust and allergens without restricting airflow. Fit and size experiences are mixed, with some customers reporting that the filters are smaller than expected or do not match their units. For buyers considering this nominal 18 × 18 × 1 filter, that fit feedback makes checking the stated actual size of 17.75 × 17.75 × 0.75 inches especially important. The listing shows 4.7 out of 5 stars across 55,420 global ratings, but aggregate ratings do not explain individual experiences.
- Positive: The customer-feedback summary reports positive impressions of filtration, including dust and allergen filtering without choking airflow.
- Positive: The summary also reports positive feedback about quality, functionality, and value for money.
- Negative: Some customer feedback reports dissatisfaction with the purchase experience; the supplied summary does not specify the reasons.
- Mixed: Customer feedback is mixed on fit and size, including reports that filters were smaller than expected or did not match a unit properly.

## Frequently asked questions

### What are the filter's actual listed dimensions?
17.75 × 17.75 × 0.75 inches, listed as 17.75"L x 17.75"W x 0.75"Th. Compare these measurements with your system's filter slot.
### How many filters are in the pack?
The listing specifies six filters.
### Which systems does the listing identify as compatible?
It lists air conditioners, furnaces, and heat pumps, and specifies residential HVAC systems.
### How often does the manufacturer suggest replacing the filter?
The manufacturer describes filtration for up to three months. Actual replacement needs can vary, so follow your system's guidance and inspect the filter as appropriate.

## Alternatives

- Filterbuy 18x18x1 Air Filter MERV 8 Dust & Allergy Defense \(4-Pack\) \| Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA \(Actual Size: 17.75 x 17.75 x 0.75\)
- TRIGHTFILTERS 18x18x1 Air Filter 4 Pack, MERV 8 Pleated HVAC Furnace Filter \| Air Conditioner Filter Replacement Dust Defense Furnace AC Protection Durable Lightweight
- TRIGHTFILTERS 18x18x1 Air Filter 4 Pack, MERV 8 Filter Replacement \| Dust & Allergy Defense, Durable Pleated Home HVAC AC Furnace Filters, Lightweight Compact Air Conditioner Filter Replacement
- Aerostar Air Filter 18x18x1 MERV 6 AC Filter, HVAC, Furnace Filter, 6 Pack \| ACTUAL SIZE \(17.50 x 17.50 x 0.75\) AC Filter, HVAC, Furnace Filter for Dust, Lint & Pollen Control MERV 6 \(MPR 300 / FPR 3\)
- BNX TruFilter 18x18x1 Air Filter MERV 11 Allergy, Dust & Pet Defense 6-Pack \| Actual Size: 17.69 x 17.69 x 0.75, Electrostatic Pleated HVAC AC Furnace Filter Replacement, Made in USA, MPR 1200 & FPR 9
- Aerostar Air Filter 18x18x1 MERV 11 AC Filter, HVAC, Furnace Filter, 6 Pack \| ACTUAL SIZE \(17.50 x 17.50 x 0.75\) AC Filter, Furnace Filter, Dust, Pet Dander, Smoke & Allergies MERV 11 \(MPR 1200 / FPR 7\)

## Add-ons

- Amazon Basics 12x12x1 Air Filter 6-Pack, MERV 8 AC Furnace, Dust, Pet & Allergen Control , Electrostatic \(Actual Size: 11.75" x 11.75" x 0.75"\)

## Images

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