18" x 24" x 2" 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 MX40-STD2-212-8X24X2) is a medium-efficiency filtration component engineered for commercial and industrial HVAC applications requiring consistent particulate removal and mechanical stability. Constructed with a rigid, moisture-resistant beverage board frame and 100% synthetic hydrophobic media, the Hi-E® 40 maintains filtration performance and structural integrity under variable humidity and airflow conditions. Rated at MERV 8 per ASHRAE 52.2, this filter delivers stable efficiency, low pressure drop, and extended service life in both primary and multi-stage air handling systems.

Technical Specifications

• Product Code: MX40-STD2-212-8X24X2
• Manufacturer: Purolator
• Series: Hi-E® 40
• Model: HE40-STD2
• Nominal Size: 18 x 24 x 2 inch
• Actual Dimensions: 17-3/8 inch (Width) x 23-3/8 inch (Height) x 1-3/4 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: 1500 CFM (Cubic Feet per Minute)
• Initial Resistance: 0.29 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 ensures dimensional stability under airflow load
  • Mechanically bonded pleated media for uniform airflow and reduced bypass
  • Even pleat spacing to maximize surface area and dust-holding capacity
  • Non-corrosive, moisture-resistant materials suitable for humid or high-velocity environments
• Applications:
  • Commercial HVAC and ventilation systems
  • Industrial air handling and filtration units
  • Institutional and healthcare environments
  • Prefilter applications in multi-stage filtration assemblies
• Installation Orientation: Install with airflow arrow aligned to system airflow direction
• Compliance: ASHRAE 52.2; UL 900 Classified

Professional Summary

The Purolator Hi-E® 40 MERV 8 Pleated Air Filter provides a robust, medium-efficiency solution for contractors and mechanical professionals managing commercial and industrial HVAC systems. Its hydrophobic synthetic media maintains stable performance in high-humidity and variable-temperature environments, while the reinforced beverage board frame delivers strength and resistance to deformation under load. Engineered for consistent airflow, predictable pressure drop, and long-term reliability, the Hi-E® 40 supports efficient system operation and dependable particulate control in demanding service conditions.