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Prime Air Duct Experts
Filtration

Filter Bypass

Air travelling around an unsealed filter instead of through it.

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All glossary terms

What is Filter Bypass?

What happens when a filter sits loose in an oversized slot. Air takes the easy path, so a substantial fraction is never filtered at all and its dust goes straight to the coil. The visual tell is a filter that has loaded in patches rather than uniformly. Sealing the slot often does more measurable good than raising the filter's MERV rating.

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We work on filter bypass every week across DFW. CSIA-certified, written quotes, financing available.

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Other terms in the glossary

MERV
The standardised scale for how efficiently a filter captures particles.
Pressure Drop
The airflow resistance a filter or fitting adds to the system.
Static Pressure
The pressure the blower works against — the measurement that says what filter a system can take.
NADCA ACR Standard
The industry standard defining what a legitimate duct cleaning actually is.
Source Removal
Extracting debris from the system rather than dislodging it into the airstream.
Plenum
The main air chamber directly at the air handler where supply or return trunks connect.

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