2 inch air filters are commonly used in residential and commercial HVAC systems, offering efficient filtration to improve air quality. Available in materials like fiberglass, pleated, and electrostatic, these filters capture dust, allergens, and particles. Pleated filters, with their larger surface area, often feature higher MERV ratings for better filtration. They are versatile, cost-effective, and compatible with various HVAC units, making them a popular choice for enhancing air quality and system efficiency.