Replacement Aprilaire 401 SpaceGard 2400 Filter 4pk

• High-Performance
• High-Output
• Micro-Free Gold HEPA-Type filter
• Easy Installation
• MERV 11, Exceeds Aprilaire OEM Filter specifications
• Manufactured by BestAir
• Equivalent Air Filter:
  Aprilaire: 401
• Fits Models-
  Aprilaire and SpaceGard Air Cleaners: 2400
  Lennox: PMAC-12C (X0577)
  #SG4

WHAT DOES MERV MEAN?
ASHRAE, which is the American Society of Heating, Refrigerating and Air-Conditioning

Minimum
Efficiency
Reporting
Value

MERV 1-4 (Greater than 10 microns): pollen, dust mites, sanding dust, carpet fibers
MERV 5-8 (3-10 microns): mold spores, hair spray, cement dust, powdered milk
MERV 9-12 (1-3 microns): Legionella, lead dust, coal dust, auto emissions, welding fumes
MERV 13-16 (0.3-1 microns): bacteria, tobacco smoke, insecticide dust, copier toner