18x20x1 Air Filters

18x20x1 Air Filters

Second Natures offers tons of filter sizes including this 18x20x1.

Filter quality (info) Subscription cost
Essential (MERV 8) $16/filter
Essential+ (MERV 10) $20/filter
Health Shield (MERV 13) $24/filter
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Easy & Convenient
Shipping is Always Free

You'll Love the Benefits!

Time & Money Savings

Prevent costly repairs to your heating and cooling systems.

HVAC Protection

Reduce the energy usage of your HVAC system by up to 15%.

Healthier Living

Improve your home’s air quality by removing harmful toxins.

Second Nature vs. the Rest

Poor air quality has a big impact on the health of you and your home. Letting it get worse can lead to some serious complications.

Pleated (Second Nature) Fiberglass Washable
Cost $10 to $30 each Less than $5 $50+
Material Polyester or Cotton Paper Fiberglass Usually Aluminum
Replacement Frequency Every 30 to 90 Days Every 30 Days Never
Maintenance Level Easy: Replace Easy: Replace Hard: Requires Cleaning
Efficient at Catching
Large Debris
Efficient at Catching
Small Particles
Recommended for People
with Allergies
Reusable
Pleated(Second Nature) Fiberglass Washable
Cost
$10 - $30 > $5 $50 +
Material
Polyester or
Cotton Paper
Fiberglass Typically
Aluminum
REPLACEMENT FREQUENCY
Every
30-90 Days
Every
30 Days
Never
MAINTENANCE LEVEL
Easy:
Replace
Easy:
Replace
Hard: Needs
Cleaning
ADDITIONAL
Catches
Large Debris
Catches
Large Debris
Catches
Large Debris
Catches
Small Particles
Can Be Reused
Good for
People with
Allergies & Pets

Why Second Nature?

You'll always remember to change your filter.

You’ll breathe easier while saving money.

You get free shipping all the time, every time. Guaranteed.

Your expensive AC system will last longer with regular filter changes.