Airex TA20251 Fiberglass Panel Air Filter 20x25x1

Product Description

The AIREX TA20251 is a 20 x 25 x 1 inch disposable fiberglass panel air filter designed for residential and light commercial HVAC and air conditioning applications. Built with Polystrand fiberglass media, the filter uses a continuous-strand construction measuring more than 3.5 microns per fiber, which classifies the fibers as nonrespirable. The media is loosely spun on the air-entering side and progressively woven tighter toward the air-exiting side, creating a heavy laminated backing. This graduated density design increases dust holding capacity and helps prevent surface loading. The filter is rated for airflow between 1050 and 1750 CFM and carries a MERV equivalent value of 4 to 5.

The TA20251 fits standard 20 x 25 x 1 inch filter slots found in forced-air furnaces, air handlers, and central air conditioning units. It is suited for residential systems and light commercial installations where an economical, disposable fiberglass filter is the specified media type. The heavy-duty moisture-resistant white Kraft board frame holds its shape in high-humidity return-air environments. The filter is UL listed and performs reliably at continuous operating temperatures up to 180 degrees F, with an intermittent rating of 200 degrees F.

Key Features

• Polystrand fiberglass media with nonrespirable fibers over 3.5 microns in diameter
• Graduated fiber density — loose on the inlet side, progressively tighter on the outlet side — maximizes dust holding and resists surface loading
• Dust holding capacity of 186 grams
• Airflow rated 1050 to 1750 CFM at 0.5 PA resistance
• Heavy-duty moisture-resistant white Kraft board frame
• UL listed; continuous temperature rating of 180 degrees F

Compatibility

Designed as an OEM-style disposable replacement for standard 20 x 25 x 1 inch filter applications in residential and light commercial forced-air HVAC systems and air conditioning units.

Installation Notes

Installation is performed by HVAC technicians or qualified service personnel. Always shut down the air handler or furnace at the disconnect or thermostat before replacing the filter. Confirm airflow direction before inserting — the filter frame is marked for correct orientation and should be installed with the loosely spun media face toward the return-air side. Dispose of the used filter in accordance with local regulations; do not attempt to clean or reuse a disposable fiberglass filter.

Technical Specifications

• Filter Type: Disposable Panel Air Filter
• Overall Width: 20 inches
• Overall Height: 25 inches
• Overall Depth: 1 inch
• Media: Fiberglass (Polystrand)
• Media Area: 3.32 sq. ft.
• MERV Value: 4 to 5
• Flow Rate: 1050 to 1750 CFM
• Resistance: 0.5 PA
• Temperature Rating: 180 degrees F continuous, 200 degrees F intermittent
• Dust Holding Capacity: 186 grams
• Frame: Heavy-duty moisture-resistant white Kraft board
• Applicable Standard: UL
• Application: Air Conditioning and Forced-Air HVAC Units

Standard Information

• Brand: AIREX
• Manufacturer Part Number: TA20251