22" x 22"x 1" Disposable Synthetic Warm Air Panel Filter, Merv 4

Product Overview

The Purolator® P312 Warm Air Filter (Model P312-22X22X1) is a disposable synthetic panel air filter engineered for consistent filtration performance in HVAC systems across residential, commercial, and light industrial applications. Manufactured with bonded polyester fiber media and a heat-sealed Monobond™ pinch frame, this filter provides structural integrity, stable airflow, and high particulate retention under varied environmental and operating conditions.

Technical Specifications

• Manufacturer: Purolator®
• Model: P312-22X22X1
• Nominal Size: 22 in. x 22 in. x 1 in.
• Filter Type: Disposable Synthetic Panel Air Filter
• Media Composition: Non-woven polyester fibers bonded in a progressive-density configuration
• Frame Construction: One-piece Monobond™ pinch frame manufactured from post-consumer recycled materials
• Seal Method: Continuous thermal bond joining media to the frame perimeter to prevent air bypass
• Binder Type: High tensile strength adhesive binder ensuring structural rigidity and media retention
• Filtration Characteristics: Interlocking fiber pattern forming multiple dust and lint retention zones
• Dust Holding Capacity: High, with even distribution across the full surface of the media
• Airflow Resistance: Low static pressure loss supporting consistent system performance
• Operating Range: Maintains stability under temperature and humidity variations
• Applications: Warm air heating systems, HVAC return air plenums, and general ventilation systems
• Environmental Attribute: Frame constructed using post-consumer recycled materials

Performance and Application

The P312 filter employs progressive-density polyester media designed to capture airborne particulates efficiently while maintaining low resistance to airflow. The Monobond™ one-piece frame construction provides a continuous heat-sealed bond between the frame and media, eliminating weak corners and potential air bypass. This design ensures mechanical strength and uniform filtration efficiency throughout the service interval. Its synthetic media construction resists moisture absorption and distortion under varying HVAC system conditions.

Usage Notes

Install the filter in accordance with the directional airflow markings printed on the frame. Inspect periodically during routine maintenance cycles and replace when visible particulate buildup occurs or when static pressure approaches system limits. The P312 is a single-use filter and is not intended for washing or reuse. Store in a clean, dry environment before installation to maintain frame alignment and performance integrity.

Summary

Purolator® P312-22X22X1 Warm Air Filter provides reliable synthetic media filtration with a rigid Monobond™ heat-sealed frame for professional HVAC applications. Designed for uniform airflow, structural strength, and high dust-holding capacity, it ensures dependable filtration performance in residential, commercial, and light industrial air handling systems.