14" x 25" x 1" Replacement Air Filter, Pleated, Merv8

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

The Purolator Hi-E® 40 Series Pleated Air Filter (Model MX40-STD1-141-14X25X1) is a medium-efficiency filtration component designed for professional HVAC and air handling systems. Built with a durable, moisture-resistant beverage board frame and 100% hydrophobic synthetic media, the filter provides stable performance and structural integrity in demanding environmental conditions. Rated at MERV 8 per ASHRAE 52.2, the Hi-E® 40 offers reliable particulate removal for commercial, industrial, and institutional air systems as either a primary filter or prefilter in multi-stage configurations.

Technical Specifications

• Product Code: MX40-STD1-141-14X25X1
• Manufacturer: Purolator
• Series: Hi-E® 40
• Model: HE40-STD1
• Nominal Size: 14 x 25 x 1 inch
• Actual Dimensions: 13-1/2 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: 730 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 beverage board frame for dimensional stability under system pressure
  • Mechanically bonded pleated media to prevent separation and air bypass
  • Even pleat spacing ensures optimal airflow and dust-holding capacity
  • Non-corrosive components suitable for humid or variable-temperature applications
• Applications:
  • Commercial HVAC and ventilation systems
  • Industrial air handling units and process systems
  • Institutional facilities and mechanical rooms
  • Prefilter use in multi-stage filtration configurations
• Orientation: Install with airflow arrow in the direction of system air movement
• Compliance: ASHRAE 52.2 and UL 900 Classified

Professional Summary

The Purolator Hi-E® 40 MERV 8 Pleated Air Filter provides consistent air filtration efficiency and mechanical stability for professional HVAC applications. Its hydrophobic synthetic media maintains structural and filtration integrity in high-humidity and variable-temperature environments, while the reinforced beverage board frame ensures secure installation and long-term durability. Designed for use as a standalone or prefilter element, the Hi-E® 40 delivers predictable performance, low pressure drop, and extended operational life in commercial and industrial systems requiring medium-efficiency air filtration.