20" x 25" x 5" Air Bear Cub Replacement Filter (MERV 11)

Trion 259112-102 20" x 25" x 5" Air Bear Cub Replacement Filter (MERV 11)
A 5" thick media replacement filter used in Trion Air Bear Cub-style whole-home air cleaner applications to capture airborne particles while allowing airflow through the HVAC system.

Key Features:

• Replacement media filter for Air Bear Cub applications
• Size listed as 20" x 25" x 5"
• MERV 11 filtration rating
• Synthetic media
• Description lists a nominal size of 19-3/4" x 24-3/4" x 5"
• Manufacturer overview highlights:
• 100% electrostatically-charged synthetic material with extended surface pleats for dirt-holding capacity
• Non-woven, 5-inch thick, pleated media that traps particles as small as one micron
• Filter frame fingers that support vertical pleats to help keep spacing consistent
• Factory-installed double gaskets (top and bottom) intended to reduce filter bypass
• Galvanized, rust-resistant wire mesh to support the media and retain pleat shape as the filter loads
• Replacement interval guidance: every 6 months for heating & cooling, or every 12 months for heating only (more often in dusty environments or with shedding pets)

Compatibility & Applications:

• Intended for use where a Trion 259112-102 Air Bear Cub replacement media filter is specified
• Must only be used where the manufacturer specifies this exact part number: 259112-102

Installation & Operation Notes:

• Filter replacement should be performed by a qualified HVAC technician or an installer familiar with whole-home media air cleaner service.
• Reference the air cleaner and HVAC equipment service/installation manual for correct filter orientation, fit, and sealing requirements.
• Confirm the installed air cleaner cabinet is designed for the listed size/nominal size before installation.

Maintenance & Troubleshooting:

• The manufacturer's guidance indicates replacement frequency depends on system use and conditions (heating-only vs. heating-and-cooling, dusty environments, shedding pets).
• If dust bypass or reduced performance is suspected after replacement, verify the filter is fully seated and that the gasketed surfaces are sealing as intended per the equipment documentation.

User Reviews & Q&A Summary:

• Reviews commonly describe it as a high-quality, correct replacement that is simple to swap and matches the needed size/application.
• Several reviewers comment positively on ordering experience (availability, ease of ordering, shipping speed, and customer service responsiveness).
• A recurring issue mentioned is shipping damage (crushed corners/frames) in some deliveries, with customers noting that replacements were handled quickly when reported.