Koch Filter P411217 Pleated Air Filter 11.75x17.75x1 in

Product Description

The KOCH FILTER P411217 is a pleated air filter built for residential and light commercial HVAC systems that require precise dimensional fit. Measuring 11.75 inches by 17.75 inches by 1 inch, it installs in standard filter slots without trimming or modification. The pleated media construction increases the effective surface area compared to flat fiberglass panels, which improves dust holding capacity and extends service intervals. Licensed HVAC technicians and facility maintenance personnel install this filter during routine seasonal servicing or whenever the existing filter is loaded to capacity.

This filter suits forced-air heating and cooling systems that accept a nominal 12 x 18 x 1 inch filter. It fits in filter grilles, air handlers, and furnace cabinets designed for that nominal size. The pleated design supports proper static pressure balance across the air handler, helping the blower maintain rated airflow through the system. It is appropriate for residential split systems, package units, and light commercial air handlers where a 1-inch depth filter rack is installed.

Key Features

• Pleated media construction increases dust holding capacity over flat-panel filters
• Exact nominal 12 x 18 x 1 inch size fits standard residential and light commercial filter racks
• Actual dimensions of 11.75 x 17.75 x 1 inch prevent bypass gaps around the filter frame
• Rigid frame maintains shape during installation and throughout the service interval
• Drop-in replacement requiring no cutting or modification

Compatibility

Designed as an OEM-style replacement pleated air filter for residential and light commercial forced-air HVAC systems accepting a nominal 12 x 18 x 1 inch filter slot.

Installation Notes

A licensed HVAC technician or qualified maintenance professional should shut down the air handler or furnace at the thermostat and disconnect power at the disconnect switch before replacing the filter. Slide the old filter out and note the airflow direction arrow printed on the frame, then insert the new P411217 with the arrow pointing toward the blower. Filters should be inspected regularly and replaced when visibly loaded or per the system manufacturer schedule. Follow all applicable local mechanical codes when servicing air-handling equipment.

Technical Specifications

• Filter Length: 17.75 inches
• Filter Width: 11.75 inches
• Filter Depth: 1 inch
• Nominal Size: 12 x 18 x 1 inch
• Media Type: Pleated

Standard Information

• Brand: KOCH FILTER
• Manufacturer Part Number: P411217