20" x 25" 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 HE40-20X25X1) is a medium-efficiency HVAC filtration element engineered for consistent particulate control and operational reliability in commercial and industrial air handling applications. Constructed with a rigid, moisture-resistant beverage board frame and 100% synthetic hydrophobic media, the Hi-E® 40 maintains filtration efficiency and structural integrity under variable airflow, humidity, and temperature conditions. Rated at MERV 8 per ASHRAE 52.2 standards, it is suitable for use as a primary filter or as a prefilter in multi-stage air filtration systems.

Technical Specifications

• Product Code: HE40-20X25X1
• Manufacturer: Purolator
• Series: Hi-E® 40
• Model: HE40-STD1
• Nominal Size: 20 x 25 x 1 inch
• Actual Dimensions: 19-1/2 inch (Width) x 24-1/2 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: 1040 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 maintains dimensional stability under pressure
  • Mechanically bonded pleated media prevents separation and ensures even airflow
  • Uniform pleat spacing for optimized dust-holding capacity and reduced pressure drop
  • Non-corrosive materials suitable for humid or temperature-variable installations
• Applications:
  • Commercial HVAC and ventilation systems
  • Industrial air handling units
  • Institutional and healthcare facilities
  • Prefilter in multi-stage filtration systems
• Installation Orientation: Install with airflow arrow aligned with system direction
• Compliance: ASHRAE 52.2; UL 900 Classified

Professional Summary

The Purolator Hi-E® 40 MERV 8 Pleated Air Filter provides HVAC professionals with a reliable, medium-efficiency filtration solution designed for consistent airflow and long service intervals. Its hydrophobic synthetic media maintains filtration performance in high-humidity and variable-temperature environments, while the reinforced beverage board frame ensures rigidity and dimensional precision. Engineered for use in commercial and industrial air systems, the Hi-E® 40 delivers predictable pressure drop, stable particulate removal, and structural durability in continuous-duty filtration applications.