To maintain ANSI Z21

Precision Engineering: Maintains accurate 7-11 inch wc outlet pressure even as inlet supply pressures fluctuate

The red-coded housing allows for immediate visual identification of its flow characteristics during field service

Because this is a direct drive heater fan

Carrier KH01AA583 Filter 320735-701 To maintain ANSI Z21The Carrier KH01AA583 is a high performance 20x24x2 fiberglass disposable filter engineered for extreme airflow efficiency in residential and commercial air handlers. This genuine OEM Carrier replacement filter features a progressive density fiberglass media designed to capture large airborne contaminants including dust, lint, and pollen without causing the excessive static pressure drop often associated with high MERV pleated filters. As a standard