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The KOCH FILTER 76B0005N15 is a pleated air filter built for geothermal HVAC systems that require larger-format replacement media. Pleated construction increases the surface area available for particle capture, which supports higher dust holding capacity and maintains consistent airflow across the filter face. Sized at 28 inches x 30 inches x 2 inches, this filter fits air handler applications where standard residential sizes are too small. Licensed HVAC technicians and geothermal system service professionals are the typical installers.
This filter is designed for geothermal air handler units that operate in residential or light commercial settings. Geothermal systems move a high volume of conditioned air through the air handler year-round, making filter selection critical to maintaining system efficiency and indoor air quality. The 2-inch depth provides a balance between media volume and compatibility with filter housings designed for standard 2-inch tracks.
Designed as an OEM-style replacement pleated air filter for geothermal HVAC air handlers requiring a 28 inches x 30 inches x 2 inches filter size.
Installation is typically performed by a licensed HVAC technician servicing a geothermal air handler. Always shut down the air handler at the thermostat and disconnect power at the breaker before removing or installing the filter. Confirm the airflow direction arrow on the filter frame aligns with the direction of airflow in the unit before seating the filter in the track. Follow the equipment manufacturer service interval recommendations for filter replacement.
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