9x24x1/4 Exact Aluminum Screen Mesh Air Filter

Description

The 9x24x1/4 Exact Aluminum Screen Mesh Air Filter from American Metal Filter Company (AMFCO) is a durable, washable impingement-type panel filter engineered for a wide range of residential, commercial, and industrial HVAC applications. Designed to effectively capture large airborne particulates, grease, and coolant mist, this filter serves as an essential component in maintaining air quality and protecting HVAC equipment.

Constructed with multiple layers of robust aluminum screen wire and a sturdy aluminum frame, this filter offers exceptional strength and longevity. Its washable design provides a cost-effective and environmentally friendly alternative to disposable filters, reducing waste and long-term operational expenses. With a precise 0.25-inch actual depth, it ensures an exact fit for systems requiring this specific dimension.

Proudly made in the USA by AMFCO, a trusted manufacturer, this aluminum screen mesh air filter is an ideal solution for systems demanding low resistance to airflow, high durability, and reliable pre-filtration capabilities. Its design makes it particularly suitable for environments where frequent cleaning and robust construction are paramount.

What Is the 9x24x1/4 Exact Aluminum Screen Mesh Air Filter?

The 9x24x1/4 Exact Aluminum Screen Mesh Air Filter is a specialized impingement-type panel filter manufactured by American Metal Filter Company (AMFCO). Unlike pleated filters that rely on fine media to trap microscopic particles, this filter is designed to capture larger airborne contaminants such as dust, lint, grease, and coolant mist through direct impact and adhesion. Its robust construction and washable nature make it an excellent choice for pre-filtration in HVAC systems, protecting more delicate downstream filters and equipment from premature clogging.

Operating efficiently at a rated airflow of 350 feet per minute (fpm), this filter maintains a low resistance to airflow, ensuring optimal system performance without excessive energy consumption. Its primary function is to remove coarse particulate matter, which is crucial for applications ranging from commercial kitchens and industrial workshops to general HVAC air intake. The ability to clean and reuse the filter significantly extends its service life, offering a sustainable and economical filtration solution.

Size Reference: 9x24x1/4 Exact Aluminum Screen Mesh Air Filter

Understanding the precise dimensions of your air filter is critical for proper fit and optimal system performance. Air filters are often referred to by their nominal size, which is a rounded measurement. However, the actual dimensions can differ slightly. For this specific product, the “Exact” in the title refers to its precise 0.25-inch actual depth.

Dimension Type	Length	Width	Depth
Nominal Size	9 inches	24 inches	1/4 inch
Actual Dimensions	9.00 inches	24.00 inches	0.25 inches

This filter is designed to fit snugly into systems requiring a precise 0.25-inch depth, ensuring no bypass of unfiltered air. Always measure your existing filter or filter slot to confirm compatibility before ordering.

Applications for Aluminum Screen Mesh Air Filters

The AMFCO 9x24x1/4 Exact Aluminum Screen Mesh Air Filter is a versatile solution for a variety of air filtration needs, particularly where large particulate removal, grease filtration, or mist collection is required. Its durable, washable design makes it suitable for demanding environments across residential, commercial, and industrial sectors.

Application	Why This Filter	Key Requirement
Residential Range Hoods	Effectively captures airborne grease and cooking particulate, preventing buildup in ductwork and improving kitchen air quality.	Grease filtration, washable for frequent cleaning.
Commercial Kitchen Ventilation	Acts as a robust pre-filter in exhaust hoods and ventilation systems to manage heavy grease loads and maintain hygiene.	High grease holding capacity, extreme durability, easy cleaning.
Industrial HVAC Pre-filtration	Protects downstream HEPA or MERV-rated filters from large dust, lint, and debris in manufacturing or workshop environments.	Coarse particulate removal, extended life of finer filters.
Coolant Mist Collection	Captures oil and coolant mist generated by machining operations, improving air quality and worker safety.	Mist impingement, resistance to industrial contaminants.
Outdoor Air Intake Ducts	Filters out leaves, insects, pollen, and other large outdoor debris before it enters the HVAC system.	Protection against environmental debris, weather resistance.
Rooftop Economizer Hoods	Prevents large foreign objects and environmental elements from entering the economizer section of HVAC units.	Robust construction, low airflow resistance, outdoor durability.
Air Handling Units (AHUs)	Used as a primary or pre-filter to protect coils, fans, and other components from large airborne contaminants.	Equipment protection, maintain system efficiency.
OEM Replacement Filters	Ideal for replacing existing aluminum mesh filters in various original equipment manufacturer systems due to its standard construction and dimensions.	Exact fit, reliable performance, long service life.

How This Filter Is Constructed

The AMFCO 9x24x1/4 Exact Aluminum Screen Mesh Air Filter is engineered for strength, durability, and effective impingement filtration. Its construction combines high-quality materials and precise manufacturing techniques to ensure reliable performance in diverse applications.

Frame

The filter features a robust frame constructed from .030” thick aluminum. This material provides excellent rigidity and corrosion resistance, crucial for longevity in various operating environments. The frame corners are mitered for a clean, precise fit and are securely fastened with pop-rivet(s), enhancing the overall structural integrity. Additionally, drain holes are strategically placed in three corners of the frame, facilitating efficient water drainage during the washing process and preventing water retention that could lead to corrosion or microbial growth.

Media Pack

At the core of the filter is the media pack, composed of multiple layers of corrugated aluminum screen wire. These layers are assembled in a criss-cross fashion, creating a dense yet permeable matrix that maximizes the impingement surface area. This design effectively captures large airborne particulates, grease, and mist as air passes through. The aluminum screen wire is inherently resistant to moisture and many chemicals, contributing to the filter’s washability and extended service life.

Face Grids

To protect the delicate media pack and provide additional structural support, the filter incorporates two layers of 24 gauge aluminum expanded metal face grids. These grids sandwich the media pack, holding it firmly in place within the frame. The expanded metal design allows for maximum airflow while preventing damage to the internal media from external forces or large debris. The combination of the sturdy frame, reinforced media pack, and protective face grids gives the RHI Series filter its exceptional strength and durability, making it suitable for repeated handling and cleaning.

Installation Instructions for Your Aluminum Air Filter

Proper installation of your AMFCO 9x24x1/4 Exact Aluminum Screen Mesh Air Filter is essential for optimal performance and system protection. Follow these guidelines to ensure a secure fit and efficient filtration.

Before Installing

• Power Off: Always turn off your HVAC system or appliance (e.g., range hood) at the thermostat or main power switch before attempting to remove or install filters.
• Verify Size: Double-check that the new filter’s actual dimensions (9.00” x 24.00” x 0.25”) match the requirements of your filter slot. An incorrect size can lead to air bypass or difficulty in installation.
• Inspect Filter: Visually inspect the new filter for any shipping damage or manufacturing defects.
• Note Airflow Direction: While aluminum mesh filters typically do not have a strict airflow arrow due to their symmetrical impingement design, some systems may have specific slot orientations. If an arrow is present on your old filter or system, note its direction.

Installation Steps

1. Locate Filter Slot: Identify the filter access panel or slot in your HVAC unit, furnace, air handler, or range hood.
2. Remove Old Filter: Carefully slide out the old filter. Be mindful of any accumulated dust or debris that might fall.
3. Clean Slot (Optional): If the filter slot is visibly dirty, gently wipe it clean to ensure a smooth installation and prevent debris from entering the system.
4. Insert New Filter: Slide the new AMFCO 9x24x1/4 Exact Aluminum Screen Mesh Air Filter into the slot. Ensure it slides in smoothly without forcing it.
5. Ensure Snug Fit: Confirm that the filter sits flush within the slot, with no gaps around the edges that could allow unfiltered air to bypass the filter. The precise 0.25-inch depth is designed for an exact fit.
6. Secure Access Panel: Close and secure any access panels or latches that were opened to access the filter slot.
7. Restore Power: Turn the power back on to your HVAC system or appliance.

Notes by System Type

• Upflow/Downflow Furnaces: Filters are typically installed in a dedicated slot in the return air duct or within the furnace cabinet itself.
• Horizontal Furnaces: Filters are usually found in a side-mounted slot.
• Return Air Grilles: For filters installed directly behind a return air grille, ensure the grille is securely fastened after filter replacement.
• Range Hoods: Filters slide into designated slots beneath the hood canopy. Ensure they lock into place if a locking mechanism is present.

Cleaning and Maintenance for Your Washable Aluminum Air Filter

The AMFCO 9x24x1/4 Exact Aluminum Screen Mesh Air Filter is designed for washability, offering a sustainable and cost-effective filtration solution. Regular cleaning is crucial to maintain optimal airflow, filtration efficiency, and the longevity of your HVAC system. Follow these steps for effective cleaning.

Washing Procedure

1. Remove Filter: Turn off your HVAC system or appliance. Carefully remove the dirty filter from its slot, being cautious of any loose debris.
2. Pre-Rinse: Rinse the filter with warm water, preferably using a garden hose or utility sink sprayer, to remove loose dust and large particulates. Rinse from both sides.
3. Soak (Optional for Grease): For filters heavily laden with grease (e.g., from range hoods), soak the filter in a solution of warm water and a mild degreasing detergent for 15-30 minutes.
4. Gentle Scrub: Using a soft brush (e.g., a dish brush) or sponge, gently scrub the filter surface with the mild detergent solution. Pay attention to the corrugated mesh layers to dislodge embedded grime.
5. Thorough Rinse: Rinse the filter thoroughly with clean warm water until all soap residue and dislodged contaminants are gone. Ensure water flows freely through the mesh.
6. Shake & Drain: Gently shake the filter to remove excess water. The drain holes in the frame will assist in this process.
7. Air Dry: Allow the filter to air dry completely before reinstallation. Place it in a well-ventilated area, ideally standing on its edge to promote drainage and airflow. Do not use heat to dry.
8. Reinstall: Once completely dry, reinstall the filter into your system, ensuring a proper fit.

What NOT To Do

• Do NOT use harsh chemicals: Avoid strong acids, alkalis, or abrasive cleaners that can damage the aluminum.
• Do NOT use high-pressure spray: Excessive water pressure can bend or damage the delicate aluminum mesh.
• Do NOT bend or distort the frame: Handle the filter carefully to maintain its structural integrity and ensure a proper fit.
• Do NOT reinstall wet: A wet filter can promote mold growth and potentially damage your HVAC system.

Cleaning Frequency Guide

• Residential Use (General HVAC): Every 1–3 months, depending on household activity, pets, and local air quality.
• Commercial Use (General HVAC): Every 1–2 months, or more frequently in high-traffic or dusty environments.
• Industrial Use (Mist/Grease): Weekly or bi-weekly, depending on the concentration of mist, grease, or heavy particulate in the air.
• Range Hoods: Monthly, or as soon as visible grease buildup occurs, to maintain optimal grease capture.

Frequently Asked Questions

What is an Aluminum Screen Mesh Air Filter?

An aluminum screen mesh air filter is an impingement-type panel filter constructed from multiple layers of corrugated aluminum screen wire within a sturdy aluminum frame. It is designed to capture larger airborne particles, lint, grease, and coolant mist through direct impact, making it ideal for pre-filtration and specific applications like range hoods.

What is the difference between nominal and actual dimensions for this filter?

Nominal dimensions are rounded, approximate measurements (e.g., 9x24x1/4 inches). Actual dimensions are the precise, exact measurements of the filter (e.g., 9.00” x 24.00” x 0.25”). For this product, the “Exact” in the title emphasizes its precise 0.25-inch actual depth, ensuring a snug fit without air bypass.

Does the installation direction matter for this filter?

Aluminum screen mesh filters typically do not have a strict airflow direction arrow because their impingement media works effectively from either side. However, always check your HVAC system or appliance for any specific instructions or existing filter orientation, as some systems may have a preferred installation direction for the frame.

How should I clean my washable aluminum air filter?

To clean, first remove the filter and rinse off loose debris with warm water. For grease, soak in warm water with a mild degreasing detergent, then gently scrub with a soft brush. Rinse thoroughly until all soap is gone, shake off excess water, and allow it to air dry completely before reinstallation. Avoid harsh chemicals or high-pressure sprays.

How often should I clean this type of filter?

Cleaning frequency depends on the application and environment. For residential HVAC, every 1–3 months. For commercial HVAC, every 1–2 months. For industrial applications with heavy mist or grease, weekly or bi-weekly cleaning may be necessary. Range hood filters typically require monthly cleaning or when visible grease accumulates.

What is the maximum operating temperature for this filter?

The AMFCO HI Series Aluminum filter is designed to withstand temperatures up to 275°F (135°C). This makes it suitable for a wide range of HVAC and industrial applications where moderate heat may be present.

What are the best applications for an aluminum screen mesh air filter?

This filter excels in applications requiring the capture of large particulates, grease, and coolant mist. Popular uses include residential and commercial range hoods, industrial ventilation for machining operations, pre-filtration in HVAC systems, outdoor air intakes, and rooftop economizer hoods.

Is it possible to get custom sizes for AMFCO aluminum filters?

Yes, American Metal Filter Company (AMFCO) specializes in manufacturing a wide range of filter sizes, including custom dimensions, to meet specific system requirements. If your application requires a size not listed, it is recommended to contact AMFCO or a distributor for custom order options.