Lukjan CA7420254TSW Top Access Filter Frame Box 20x25x4

Product Description

The LUKJAN CA7420254TSW is a top-access filter frame box designed for residential and light commercial HVAC duct systems. It accepts a 1-inch filter slot and features a swing door for fast, tool-free filter changes from the top of the unit. The frame body is 20 inches by 25 inches with a 4-inch depth, making it a practical fit for air handlers and furnace return-air duct configurations. Licensed HVAC technicians and sheet metal installers typically specify this style of frame box where accessible filter maintenance is a priority.

This filter frame box is suited for installation in forced-air furnace and air handler return-air duct systems. The top-access swing door design eliminates the need to cut into ductwork for routine filter service. It fits standard 20x25x1-inch filters, a widely stocked size across residential and light commercial HVAC applications. Installation is typical in attic, closet, or mechanical-room air handler configurations where side or bottom access is limited.

Key Features

• Top-access swing door allows fast filter changes without tools
• 1-inch filter slot accommodates standard 20x25x1-inch filters
• 4-inch frame body depth fits standard duct collar applications
• Universal filter frame box category for broad furnace and air handler fitment
• Designed for return-air duct installations in residential and light commercial systems

Compatibility

Designed as an OEM-style universal replacement or new-installation filter frame box for residential and light commercial forced-air furnace and air handler return-air duct systems accepting a 20x25x1-inch filter.

Installation Notes

Installation is performed by a licensed HVAC technician or qualified sheet metal installer. Disconnect power to the air handler or furnace before beginning duct work. Secure the frame box to the duct collar using sheet metal screws and seal all joints with UL-listed foil tape or mastic in accordance with local mechanical codes. Always verify filter size and airflow direction before closing the swing door and restoring power.

Technical Specifications

• Size: 20 inches x 25 inches x 4 inches
• Filter Slot: 1 inch
• Access Type: Top access with swing door
• Category: Universal Filter Frame Box
• Application: Furnace and Air Handler Fittings

Standard Information

• Brand: LUKJAN
• Manufacturer Part Number: CA7420254TSW