Skip to content

FREE SHIPPING on domestic U.S orders over $50

Filter Fit Guarantee™ Learn More

FAQ Quote Request My Account

HVAC Filters
- HVAC Filters
- Shop by Size
- Shop by Type
  
  Pleated
  Basic Panel / Fiberglass
  Washable / Permanent
  Bag Filters
  V-Cell / Rigid
  Cartridge
  Geothermal
  Service Rolls
  View all Shop by Type
- Shop by MERV
  
  MERV 1-4 (Basic Protection)
  MERV 8 (Standard)
  MERV 10
  MERV 11
  MERV 13 (High Efficiency)
  View all Shop by MERV
- Shop by Brand
  
  AAF Flanders
  Koch
  PrimeShield (House Brand)
  NaturalAire
  Filtrete
  EZ-Flow
  DriPak
  VariCel
  Exact Filters
  View all Shop by Brand
- Carbon & Odor Control
  
  Pleated Carbon Panels
  V-Cell Carbon (12" deep)
  VOC & Odor Removal
  Cleanroom & Semiconductor
  Hospital & Pharmaceutical
  Museum & Archive
  Industrial Process
  View all Carbon & Odor Control
- HEPA & High-Efficiency
Custom Filters
Refrigerator Filters
- Refrigerator Filters
- Shop by Refrigerator Brand
  
  Frigidaire & Electrolux
  Whirlpool / EveryDrop
  GE
  LG
  Samsung
  EarthSmart Compatible
  View all Shop by Refrigerator Brand
- Top Refrigerator Models
  
  GE MWF
  LG LT700P
  LG LT1000P
  Frigidaire WF3CB
  Frigidaire EPTWFU01
  Samsung HAFCIN
  EveryDrop Filter 1
  EveryDrop Filter 4
  View all Top Refrigerator Models
- All Refrigerator Filters
Paint Booth
- Paint Booth
- Paint Arrestor Pads & Rolls
  
  SprayStop S (Standard)
  SprayStop SHC (High Capacity)
  SprayStop HCX (Super High Capacity)
  SprayStop FG (Fiberglass)
  STK (High-Tack Chromate/Powder)
  Paint Pockets (Green & White)
  View all Paint Arrestor Pads & Rolls
- Paint Arrestor Blankets
- Expanded Paper Arrestors
- NESHAP/MACT Compliance
  
  NESHAP 2-Stage (E-Pak 650)
  NESHAP 3-Stage (E-Pak 950)
  Pocket & Cube Filters
  View all NESHAP/MACT Compliance
- Diffusion Media (KDF 600)
For Business
Resources
My Account

Instagram
YouTube
TikTok
Twitter

Commercial and Residential Filter Solutions

Select product type

Search our store

Customer Support

Text, Email, Call

My Account Cart

HVAC Filters
- Shop by Size
- Shop by Type
  
  Pleated
  Basic Panel / Fiberglass
  Washable / Permanent
  Bag Filters
  V-Cell / Rigid
  Cartridge
  Geothermal
  Service Rolls
  View all Shop by Type
- Shop by MERV
  
  MERV 1-4 (Basic Protection)
  MERV 8 (Standard)
  MERV 10
  MERV 11
  MERV 13 (High Efficiency)
  View all Shop by MERV
- Shop by Brand
  
  AAF Flanders
  Koch
  PrimeShield (House Brand)
  NaturalAire
  Filtrete
  EZ-Flow
  DriPak
  VariCel
  Exact Filters
  View all Shop by Brand
- Carbon & Odor Control
  
  Pleated Carbon Panels
  V-Cell Carbon (12" deep)
  VOC & Odor Removal
  Cleanroom & Semiconductor
  Hospital & Pharmaceutical
  Museum & Archive
  Industrial Process
  View all Carbon & Odor Control
- HEPA & High-Efficiency
Custom Filters
Refrigerator Filters
- Shop by Refrigerator Brand
  
  Frigidaire & Electrolux
  Whirlpool / EveryDrop
  GE
  LG
  Samsung
  EarthSmart Compatible
  View all Shop by Refrigerator Brand
- Top Refrigerator Models
  
  GE MWF
  LG LT700P
  LG LT1000P
  Frigidaire WF3CB
  Frigidaire EPTWFU01
  Samsung HAFCIN
  EveryDrop Filter 1
  EveryDrop Filter 4
  View all Top Refrigerator Models
- All Refrigerator Filters
Paint Booth
- Paint Arrestor Pads & Rolls
  
  SprayStop S (Standard)
  SprayStop SHC (High Capacity)
  SprayStop HCX (Super High Capacity)
  SprayStop FG (Fiberglass)
  STK (High-Tack Chromate/Powder)
  Paint Pockets (Green & White)
  View all Paint Arrestor Pads & Rolls
- Paint Arrestor Blankets
- Expanded Paper Arrestors
- NESHAP/MACT Compliance
  
  NESHAP 2-Stage (E-Pak 650)
  NESHAP 3-Stage (E-Pak 950)
  Pocket & Cube Filters
  View all NESHAP/MACT Compliance
- Diffusion Media (KDF 600)
For Business
Resources

Home
Search

Search

Search our store

Found 307 results for “18x30x1 naturalaire”

Filter Filter & sort

Filter

Price

$ From

-

$ To

From To

MERV Rating (0)

MERV Rating

MERV 1-4 (11 products)
MERV 8 (122 products)
MERV 10 (90 products)
MERV 11 (2 products)
MERV 13 (57 products)
MERV 8 HC (1 product)
MERV 10 HC (1 product)
MERV 11 HC (1 product)
MERV 12 (1 product)
MERV 13 HC (1 product)

Brand (0)

Brand

AAF Flanders (267 products)
Exact Filters (4 products)
Filtrete (2 products)
Koch (9 products)
RTF (3 products)

Filter Type (0)

Filter Type

HVAC Air Filter (2 products)
Pads (1 product)
Panel (5 products)
Pleated (276 products)
Washable (2 products)

Dimensions (0)

Dimensions

Sort by

Clear all

Price

$ From

-

$ To

From To

MERV Rating (0)

MERV Rating

MERV 1-4 (11 products)
MERV 8 (122 products)
MERV 10 (90 products)
MERV 11 (2 products)
MERV 13 (57 products)
MERV 8 HC (1 product)
MERV 10 HC (1 product)
MERV 11 HC (1 product)
MERV 12 (1 product)
MERV 13 HC (1 product)

Brand (0)

Brand

AAF Flanders (267 products)
Exact Filters (4 products)
Filtrete (2 products)
Koch (9 products)
RTF (3 products)

Filter Type (0)

Filter Type

HVAC Air Filter (2 products)
Pads (1 product)
Panel (5 products)
Pleated (276 products)
Washable (2 products)

Dimensions (0)

Dimensions

Showing 307 results

Sort by

Sort by

Showing 307 results

Sort by

Sort

MERV 13

Vendor:
AAF Flanders
18x24x1 NaturalAire Healthy Ultra MERV 13 (12 Filters)

Regular price $ 221.99

Sale price $ 221.99 Regular price
Unit price per
MERV 8

Vendor:
AAF Flanders
15x20x1 NaturalAire Standard MERV 8 (12 Filters)

Regular price $ 96.99

Sale price $ 96.99 Regular price
Unit price per
MERV 13

Vendor:
AAF Flanders
20x30x1 NaturalAire Healthy Ultra MERV 13 (12 Filters)

Regular price $ 208.99

Sale price $ 208.99 Regular price
Unit price per
MERV 8

Vendor:
AAF Flanders
20x36x1 NaturalAire Standard MERV 8 (12 Filters)

Regular price $ 169.99

Sale price $ 169.99 Regular price
Unit price per
Vendor:
AAF Flanders
18x36x1 NaturalAire Healthy Ultra MERV 13 (12 Filters)

Regular price $ 319.99

Sale price $ 319.99 Regular price
Unit price per
MERV 8

Vendor:
AAF Flanders
NaturalAire Standard MERV 8 (6 Filters)

Regular price $ 74.99

Sale price $ 74.99 Regular price
Unit price $ 12.50 per item
MERV 10

Vendor:
AAF Flanders
12x24x1 NaturalAire Microparticle MERV 10 (6 Filters)

Regular price $ 87.99

Sale price $ 87.99 Regular price
Unit price per
Vendor:
AAF Flanders
29-1/2x19-1/2x1 NaturalAire Standard MERV 8 (12 Filters)

Regular price $ 276.99

Sale price $ 276.99 Regular price
Unit price per
MERV 10

Vendor:
AAF Flanders
12x18x1 NaturalAire Microparticle MERV 10 (6 Filters)

Regular price $ 108.99

Sale price $ 108.99 Regular price
Unit price per
MERV 8

Vendor:
AAF Flanders
23-1/2x21-1/2x1 NaturalAire Standard MERV 8 (12 Filters)

Regular price $ 182.99

Sale price $ 182.99 Regular price
Unit price per
MERV 10

Vendor:
AAF Flanders
16x24x1 NaturalAire Microparticle MERV 10 (6 Filters)

Regular price $ 69.99

Sale price $ 69.99 Regular price
Unit price per
MERV 10

Vendor:
AAF Flanders
18x18x1 NaturalAire Microparticle MERV 10 (12 Filters)

Regular price $ 238.99

Sale price $ 238.99 Regular price
Unit price per
Vendor:
AAF Flanders
12x30x1 NaturalAire Healthy Ultra MERV 13 (12 Filters)

Regular price $ 289.99

Sale price $ 289.99 Regular price
Unit price per
MERV 10

Vendor:
AAF Flanders
20x22x1 NaturalAire Microparticle MERV 10 (6 Filters)

Regular price $ 119.99

Sale price $ 119.99 Regular price
Unit price per
MERV 8

Vendor:
AAF Flanders
21x21x1 NaturalAire Standard MERV 8 (12 Filters)

Regular price $ 159.99

Sale price $ 159.99 Regular price
Unit price per
MERV 8

Vendor:
AAF Flanders
22x22x1 NaturalAire Standard MERV 8 (12 Filters)

Regular price $ 141.99

Sale price $ 141.99 Regular price
Unit price per

Quick Links

My Account
About Us
Commercial Services
MERV Rating Explained
Verified Reviews
Clean Air Blog
Filter Fit Guarantee™
Filter Partners™ Affiliate
Promotions
Best AC Filters
Best Furnace Filters
How to Measure
Shipping
Return policy
Manage Subscription
Subscription Policy
Terms of Service
Privacy Policy

Shop by...

Best Sellers
AAF Flanders
Koch
Filter Sizes
Pleated Filters
Basic Filters
Custom Filters
EZ Flow Filters
Exact Fit Filters
NaturalAire Filters
Warehouse Deals

Contact RTF

Contact Us
FAQ / Knowledge Base
Delivery Times
Price Match
Order Status
Quote Request
Tax Exempt
Submit Damage or Size Claim
Filter Change Reminders

Talk to a filtration specialist

Bulk orders, custom specs, or spec'ing filters for a facility? Built on the back of 50 years of HVAC filtration experience — our team can help you get it right the first time.

Payment methods

© 2026, RememberTheFilter.com. Powered by Shopify

|

Free Shipping
Easy Returns
Security & SSL
Filter Help
Contact us

Instagram
YouTube
TikTok
Twitter

Choosing a selection results in a full page refresh.
Opens in a new window.

Talk to a filter expert

M–F 6 AM–5 PM PST · Text anytime

Call us 866-469-8556 › Text us 425-515-2727 · Fastest way to reach us › Email us Send a message · We reply quickly › Request a quote Volume, recurring, gov/military ›

Trusted brands · No knockoffs · Ships nationwide