20" x 22" x 1" Replacement Air Filter, Pleated, Merv 8

Purolator Hi-E® 40 Pleated Air Filter – Technical Product Information

The Purolator Hi-E® 40 Series Pleated Air Filter (Model HE40-20X22X1) is a medium-efficiency filtration unit designed for professional HVAC, air handling, and mechanical ventilation systems. Engineered with a rigid beverage board frame and 100% synthetic, hydrophobic media, the Hi-E® 40 provides stable performance under varying air velocities and humidity conditions. Its MERV 8 rating ensures reliable particulate removal efficiency, making it suitable for use as a primary or secondary filter in commercial, industrial, and institutional air quality management systems.

Technical Specifications

• Product Code: HE40-20X22X1
• Manufacturer: Purolator
• Series: Hi-E® 40
• Model: HE40-STD1
• Nominal Size: 20 x 22 x 1 inch
• Actual Dimensions: 19-3/4 inch (Width) x 21-3/4 inch (Height) x 3/4 inch (Depth)
• Available Depths: 1", 2", and 4"
• Media Type: 100% Synthetic, Un-dyed, Hydrophobic
• Media Color: White
• Frame Material: Moisture-Resistant Beverage Board
• Performance Rating: MERV 8 (per ASHRAE 52.2)
• Airflow Capacity: 915 CFM (Cubic Feet per Minute)
• Initial Resistance: 0.27 in. wg @ rated airflow
• Final Recommended Resistance: 1.0 in. wg
• Average Dust Spot Efficiency: 35–40%
• Average Arrestance: Approximately 95%
• Maximum Operating Temperature: 225°F (107°C)
• Construction Features:
  • Rigid die-cut beverage board frame resists deformation under variable flow
  • Mechanically bonded pleated media for consistent filtration and strength
  • Uniform pleat spacing to maximize surface area and dust-holding capacity
  • Non-corrosive materials compatible with humid or temperature-variable environments
• Applications:
  • Commercial and industrial HVAC systems
  • Air handling units and packaged rooftop systems
  • Institutional and healthcare facilities
  • Prefilter use ahead of high-efficiency particulate or HEPA filters
• Orientation: Install with airflow arrow matching system direction
• Compliance: ASHRAE 52.2; UL 900 Classified

Professional Summary

The Purolator Hi-E® 40 MERV 8 Pleated Filter provides a professional-grade air filtration solution engineered for consistent performance and mechanical stability in HVAC and air handling systems. Its synthetic hydrophobic media maintains integrity in moisture-prone environments while sustaining low pressure drop and high arrestance efficiency. The rigid beverage board frame and uniform pleat structure ensure dimensional reliability and resistance to operational stress. Designed for both new installations and retrofit applications, the Hi-E® 40 supports energy-efficient airflow, extended filter life, and stable particulate control in demanding commercial and industrial environments.