GeneralAire AC-1 Replacement Air Filters, 2-Pack – MERV 11, 19 5/8 x 25 x 6, #4001

Overview

Upgrade your GeneralAire air cleaner with this convenient two-pack of replacement filters. These MERV 11 pleated media filters are designed to fit GeneralAire AC-1 and are compatible with additional models such as AC-3 and AC-22, as well as Carrier 31MF020/31MF120 and Bryant 902BX units.

Each filter is built to deliver reliable, OEM-style performance in a compact, easy-to-handle package. The 2-pack format provides a ready supply for seasonal replacements, helping you keep your system operating smoothly without repeated trips to the store.

Key benefits

• OEM replacement: Part 12758 / AC-1 #4001 equivalent for a trusted fit.
• High-efficiency filtration: MERV 11-rated pleated media captures a broad range of particles for improved air quality in daily life.
• Two-pack value: Ready-to-use pair reduces the frequency of purchases and replacements.
• Green packaging: Updated boxes reflect a refreshed, eco-conscious approach to shipping.

Fit and sizing

Designed to fit air cleaners that use GeneralAire AC-1 style filters, each unit measures 19 5/8 inches by 25 inches by 6 inches. The filter ships collapsed and expands to fill the frame, with pleat spacers helping you maintain the proper configuration for optimal performance.

Real-life use scenarios

• Families with dust, pet dander, or seasonal allergens may notice a clearer living space as filtration supporters work in the background.
• Homes with cooking activity or pet households can benefit from reduced odor and settled dust in common rooms.
• Seasonal maintenance is simplified with a bundled 2-pack, making it easier to plan replacements around HVAC service windows.

Installation tips

Carefully remove the collapsed filter from its packaging, expand it inside your existing frame using the pleat spacers, and slide it into place with the correct orientation. Ensure a snug seal to maximize performance and maintain airflow.

Note: Outcomes can vary by system, but this two-pack offers a straightforward way to keep your GeneralAire air cleaner working as intended and to simplify routine maintenance for busy households.