20" x 20" 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 HE40-20X20X1) is a medium-efficiency HVAC filter engineered for consistent particulate control and long service life in commercial and industrial air handling applications. Constructed with a rigid, moisture-resistant beverage board frame and 100% hydrophobic synthetic media, the Hi-E® 40 provides reliable MERV 8 performance under varied temperature and humidity conditions. Its mechanically bonded pleats ensure structural stability and uniform airflow distribution, making it suitable for use as a primary filter or prefilter in multi-stage air filtration systems.

Technical Specifications

• Product Code: HE40-20X20X1
• Manufacturer: Purolator
• Series: Hi-E® 40
• Model: HE40-STD1
• Nominal Size: 20 x 20 x 1 inch
• Actual Dimensions: 19-1/2 inch (Width) x 19-1/2 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: 830 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 for dimensional stability
  • Mechanically bonded pleated media for consistent filtration performance
  • Even pleat spacing ensures low resistance and balanced air distribution
  • Non-corrosive components for use in humid and variable temperature environments
• Applications:
  • Commercial HVAC and air handling systems
  • Industrial air filtration and process ventilation
  • Institutional and healthcare facilities
  • Prefilter use in multi-stage filtration systems
• Installation Orientation: Install with airflow arrow aligned to system direction
• Compliance: ASHRAE 52.2, UL 900 Classified

Professional Summary

The Purolator Hi-E® 40 MERV 8 Pleated Filter is a professional-grade air filtration solution designed for consistent efficiency and low pressure drop across a range of HVAC system conditions. The hydrophobic synthetic media provides stable filtration performance and resistance to moisture absorption, while the reinforced beverage board frame maintains rigidity during installation and operation. Engineered for reliability, the Hi-E® 40 filter supports extended service life, predictable pressure characteristics, and reduced maintenance intervals in demanding commercial and industrial air handling environments.