Frequently Asked Questions

FILTR filters are engineered to eliminate air bypass, one of the biggest weaknesses of traditional cardboard-framed filters.

Most standard filters allow dirty, unfiltered air to pass around the edges of the filter. This bypass allows contaminants to:

• Coat HVAC coils
• Accumulate inside ductwork
• Enter the living or working space

Over time, this contamination reduces efficiency and indoor air quality.

Studies have documented that even a thin film of contamination on HVAC coils can increase energy consumption by up to 37%.

In addition to higher energy bills:

• Contaminants inside the HVAC conveyance system can cause long-term systemic problems
• Duct and coil contamination can be extremely expensive to remediate or replace

Preventing bypass helps protect both your system and your investment.

Traditional cardboard-framed filters are vulnerable to moisture, even when treated.

Moisture exposure can:

• Cause the frame to become wet and buckle under system pressure
• Lead to premature filter failure
• Create conditions where mold and other microbials can grow on the frame and filter media

This is especially common in humid climates.

FILTR LLC filters:

• Use no cardboard
• Rely on an internal wire ring for structural support
• Seal the wire ring between two layers of synthetic filter media

This design creates a filter that is:

• Resistant to moisture and mold
• Structurally stable under airflow pressure
• Effective at reducing bypass
• Designed to save money by reducing costly mold and contamination abatement

Most homes should replace filters every 30–60 days, especially in humid or high-use environments.

Yes. FILTR offers annual subscription plans with free shipping and reminder notifications to ensure timely filter replacement.