Description
Product Overview
The HKAS200750-1-24.625X28.875X1.750 is a 24.625×28.875×1.75 washable aluminum foil mesh air filter engineered for permanent installation in outdoor residential, commercial, and industrial HVAC applications where a durable, low-resistance, and continuously washable pre-filter is required. As an impingement-type aluminum foil mesh air filter, the HKAS200750-1-24.625X28.875X1.750 captures large airborne particulate and coolant mist from the airstream, making it an ideal solution for outside and make-up air intake filter ducts, rooftop economizer filter sections and hoods, and air handling unit filter sections. The HKAS200750-1-24.625X28.875X1.750 delivers reliable filtration performance across a broad range of operating conditions while maintaining exceptionally low resistance to airflow — one of the defining performance characteristics of the HK Series.
Constructed with a precision-formed .030” thick aluminum frame, 24 gauge aluminum face grids on both the air entry and exit sides, and a 5-ply media pack consisting of multiple layers of corrugated aluminum foil mesh and expanded metal assembled in a criss-cross fashion for rigidity — placed between two layers of expanded metal — the HKAS200750-1-24.625X28.875X1.750 delivers consistent filtration performance with the structural durability required for demanding outdoor and commercial HVAC applications. With actual dimensions of 24.625” H x 28.875” W x 1-3/4″ D (±1/8”), this filter installs precisely in standard 24.625×28.875×1.75 nominal filter housings throughout outside air intake filter duct systems, rooftop economizer filter units, and air handling equipment.
The HKAS200750-1-24.625X28.875X1.750 operates on the impingement principle: airborne particulate, water droplets, and coolant mist cannot follow the tortuous path through the corrugated aluminum foil mesh layers at rated airflow velocity, causing them to collide with the mesh surfaces where they are captured and retained. The criss-cross media assembly provides a highly efficient tortuous path with low pressure drop, delivering the combination of better average arrestance and low resistance to airflow that distinguishes the HK Series from heavier, higher-resistance filter alternatives. Drain holes in three corners of the frame allow collected liquid to exit the filter during operation. The HKAS200750-1-24.625X28.875X1.750 may be installed vertically or horizontally — no specific top-up orientation is required.
The HKAS200750-1-24.625X28.875X1.750 is manufactured by American Metal Filter Company (AMFCO) and is UL Classified 900. The all-aluminum construction — frame, face grids, and aluminum foil mesh media — provides consistent corrosion resistance in moisture-laden outdoor applications where the filter is continuously exposed to rain, humidity, coolant mist, and airborne particulate. The frame’s pop-rivet corner construction and mitered joints maintain the critical 24.625” x 28.875” face dimensions within ±1/8” tolerance throughout the filter’s operational lifetime. For HVAC engineers, building operators, facilities managers, and commercial contractors who need a reliable, permanent washable aluminum foil mesh pre-filter with low airflow resistance, the HKAS200750-1-24.625X28.875X1.750 delivers the performance and economics of the HK Series in a standard 24.625×28.875×1.75 nominal size.
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Key Benefits of the HKAS200750-1-24.625X28.875X1.750 Washable Aluminum Foil Mesh Air Filter
- Better Average Arrestance: The HKAS200750-1-24.625X28.875X1.750 delivers better average arrestance than comparable single-layer metal mesh alternatives thanks to the criss-cross multi-layer aluminum foil mesh assembly. The 5-ply media pack provides multiple impingement surfaces for capturing large airborne particulate, providing reliable washable aluminum foil mesh pre-filter protection for downstream HVAC equipment and coils in outdoor and economizer applications
- Low Resistance to Airflow: The corrugated aluminum foil mesh and expanded metal media pack is designed specifically for low pressure drop across the full rated airflow range of 300–500 fpm. This low resistance characteristic protects fan efficiency, maintains design airflow rates, and minimizes operating energy costs compared to higher-resistance filter media alternatives — a key advantage for rooftop economizer filter and outdoor air intake applications
- Washable and Reusable: Rinse with warm water to restore full filtration performance — no replacement media required. Eliminates the recurring cost and logistics of disposable filter programs while maintaining consistent low-resistance pre-filtration throughout decades of outdoor residential, commercial, and industrial HVAC service. Rated for frequent and moderate washing per AMFCO manufacturer specifications
- Corner Drain Holes: Drain holes in three corners of the aluminum frame allow collected liquid — rain water, condensation, coolant mist — to exit the filter during operation, preventing liquid accumulation that could increase pressure drop or promote biological growth in outdoor applications. This design is compatible with both vertical and horizontal installation orientations
- 200°F Maximum Operating Temperature: Rated for continuous operation at temperatures up to 200°F, making the HKAS200750-1-24.625X28.875X1.750 suitable for a broad range of commercial and industrial HVAC applications including high-temperature outdoor air intakes, rooftop economizer filter units, and air handling equipment in warm climates
- Versatile Installation: The HKAS200750-1-24.625X28.875X1.750 may be installed vertically or horizontally in HVAC systems — no specific up/down orientation is required. This installation flexibility simplifies retrofitting into existing filter sections and accommodates the varied duct orientations common in rooftop economizer filter and outside air intake filter system designs
- All-Aluminum Construction: .030” thick aluminum frame, 24 gauge aluminum face grids, and aluminum foil mesh media provide consistent corrosion resistance in outdoor and moisture-laden HVAC environments. Unlike galvanized or coated steel alternatives that can rust or corrode when continuously exposed to rain, coolant mist, and elevated humidity, the all-aluminum HKAS200750-1-24.625X28.875X1.750 maintains structural integrity and dimensional accuracy throughout decades of outdoor service
- Made in USA by AMFCO — UL Classified 900: Manufactured by American Metal Filter Company with precision quality control ensuring consistent dimensional accuracy, proper fitment in standard HVAC housings, and reliable filtration performance. Meets UL 900 standard for air filter units
Technical Specifications
The HKAS200750-1-24.625X28.875X1.750 24.625×28.875×1.75 washable aluminum foil mesh air filter delivers verified performance specifications for pre-filtration and particulate capture in outdoor and commercial HVAC applications. All specifications conform to the authoritative AMFCO HK Series Tech Sheet. The comprehensive data below covers every dimension, material, and performance parameter required for HVAC system design, procurement specifications, facility maintenance documentation, and regulatory compliance records.
| Specifications: | Details: |
|---|---|
| Model Number | HKAS200750-1-24.625X28.875X1.750 (HK Series — Washable Aluminum Foil Mesh Air Filter) |
| Nominal Size | 24.625” x 28.875” x 1.75” |
| Actual Dimensions | 24.625” H x 28.875” W x 1-3/4″ D (±1/8” H&W) |
| Frame Material | .030” thick aluminum |
| Frame Construction | Precision-mitered corners secured with pop rivet(s); drain holes in three corners |
| Face Grid Material | 24 gauge aluminum (both air entry and exit sides) |
| Media | Aluminum foil mesh — 5-ply: multiple layers of corrugated aluminum foil mesh and expanded metal in criss-cross assembly |
| Media Pack Placement | Pack placed between two layers of expanded metal |
| Filter Type | Impingement type washable panel filter |
| Primary Function | Airborne particulate and coolant mist pre-filtration |
| Average Arrestance | 65% at rated airflow (ASHRAE 52.1 rated airflow: 350 fpm) |
| Dust Holding Capacity | 45 grams per square foot |
| Rated Airflow | 350 fpm face velocity |
| Recommended Airflow Range | 300–500 fpm |
| Maximum Operating Temperature | 200°F |
| Recommended Final Resistance | 0.50 inches W.G. before cleaning |
| Cleaning Method | Rinse with moderate-to-heavy stream of warm water; high-powered steam cleaning and chemical dips are unnecessary and not recommended |
| Adhesive Coating Option | Not supplied from factory; may optionally be sprayed with Filter Coat (water-soluble adhesive and detergent) before installation. AMFCO does not sell Filter Coat nor any adhesive. |
| Installation Orientation | Vertical or horizontal — no specific up/down orientation required |
| Drain Hole Placement | Three corners of the frame |
| Washability | Frequent and moderate |
| Filter Weight | 4.41 lbs |
| Compliance & Certifications | UL Classified 900 |
| UPC Code | 840373524488 |
| GTIN Code | 00840373524488 |
| Country of Origin | Made in USA |
Commercial & Industrial Applications
The HKAS200750-1-24.625X28.875X1.750 24.625×28.875×1.75 washable aluminum foil mesh air filter delivers reliable performance across residential, commercial, and industrial HVAC environments where a durable, permanent, low-resistance washable aluminum foil mesh pre-filter is required for outdoor air intake, economizer filter, or make-up air intake filter applications. The impingement-type aluminum foil mesh construction, 200°F temperature rating, and all-aluminum corrosion resistance make this filter suitable for continuous operation in demanding outdoor and process applications that require frequent washing.
Outside and make-up air intake filter Systems
Commercial and industrial buildings’ outside air intake filter systems subject HVAC equipment to airborne particulate, rain entrainment, wind-driven debris, insects, leaves, and seasonal contamination that must be removed before air enters fan sections, heating and cooling coils, and downstream filter banks. The HKAS200750-1-24.625X28.875X1.750 installed at outside air intake filter locations provides the first stage of particulate capture, protecting downstream equipment and extending the service life of higher-efficiency secondary filters. Its low resistance to airflow ensures that the washable aluminum foil mesh pre-filter does not degrade fan performance or restrict design airflow rates in systems where outside air flow is critical for ventilation compliance. Commercial office buildings, warehouses, manufacturing facilities, data centers, and institutional buildings with outside air systems benefit from the HKAS200750-1-24.625X28.875X1.750’s combination of durable washable construction, 200°F temperature tolerance, and low pressure drop across the full 300–500 fpm operating range.
Rooftop economizer filter sections and hoods
Rooftop HVAC units with economizer filter sections and hoods use outside air for free cooling when outdoor conditions permit, continuously drawing in unfiltered outdoor air across the full operating season. The HKAS200750-1-24.625X28.875X1.750 installed in rooftop economizer filter sections captures large particulate, airborne debris, and moisture that would otherwise reach economizer dampers, heat exchangers, and indoor air distribution components. The all-aluminum construction resists the UV exposure, thermal cycling, and moisture conditions characteristic of rooftop installations, maintaining structural integrity and dimensional accuracy across years of outdoor service. The simple warm-water washing maintenance procedure is particularly well-suited for rooftop applications where filter access is limited to scheduled maintenance visits, as the infrequent washing requirement and long service life between cleanings minimizes the number of rooftop access events required.
air handling unit filter sections — washable aluminum foil mesh pre-filter Applications
Commercial and industrial air handling units benefit from the HKAS200750-1-24.625X28.875X1.750 as a permanent washable aluminum foil mesh pre-filter upstream of higher-efficiency secondary filter banks. By capturing large particulate, dirt, dust, and debris at the pre-filter stage, the HKAS200750-1-24.625X28.875X1.750 extends the service life of more expensive downstream media filters and electrostatic filters, reducing replacement costs and maintenance frequency for the overall filter system. The low-resistance aluminum foil mesh construction minimizes the pressure drop contribution of the pre-filter stage, preserving fan capacity for downstream filter banks. Air handling units in commercial buildings, industrial process ventilation systems, clean room washable aluminum foil mesh pre-filter applications, and HVAC systems with multi-stage filter configurations are all well-served by the HKAS200750-1-24.625X28.875X1.750’s combination of low resistance, durable washability, and broad temperature tolerance.
Coolant Mist and Industrial Ventilation
Light industrial manufacturing operations using coolant delivery systems, metalworking equipment, or process cooling generate oil mist and coolant aerosols that must be captured in ventilation exhaust streams. The HKAS200750-1-24.625X28.875X1.750’s impingement-type aluminum foil mesh construction captures coolant mist droplets and oil aerosol through the same mechanism it uses for larger airborne particulate, collecting captured liquid in the frame corners where drain holes allow it to exit the filter during operation. Industrial ventilation engineers specifying mist control for machining centers, stamping operations, and process cooling exhaust applications select the HK Series washable aluminum foil mesh air filter for its 200°F temperature rating, all-aluminum construction compatible with common coolant chemistry, and heavy-duty washable aluminum foil mesh filter design that withstands the frequent cleaning demanded by industrial operating environments.
Construction Features
The HKAS200750-1-24.625X28.875X1.750 24.625×28.875×1.75 washable aluminum foil mesh air filter represents precision construction engineered for decades of reliable pre-filtration performance across thousands of wash cycles and years of demanding outdoor and commercial HVAC service. Every component is specified to deliver consistent impingement-type particulate capture, structural durability, corrosion resistance, and complete washability — from the precision-mitered aluminum frame with corner drain holes to the 5-ply criss-cross aluminum foil mesh media pack and dual 24 gauge aluminum face grids.
Aluminum Frame with Corner Drain Holes
The precision-formed .030” thick aluminum perimeter frame provides exceptional structural rigidity for a 24.625×28.875×1.75 panel filter while resisting corrosion from continuous outdoor exposure, rain, coolant mist, and elevated humidity. The all-aluminum construction eliminates the rusting and frame deterioration that affect galvanized or coated steel frames when continuously exposed to outdoor moisture and elevated temperatures up to 200°F. Precision-mitered corner joints secured with pop rivet(s) create true 90-degree angles that maintain the critical 24.625” x 28.875” face dimensions within ±1/8” tolerance across years of service, ensuring proper housing fitment that prevents bypass around the filter perimeter. Drain holes in three corners of the frame provide exit paths for collected liquid — rain water, condensate, and coolant mist — that accumulates during filtration, allowing passive liquid drainage without operator intervention. This design accommodates both vertical and horizontal installation orientations.
5-Ply Criss-Cross Aluminum Foil Mesh Media Pack
The 5-ply aluminum foil mesh media pack is the performance core of the HKAS200750-1-24.625X28.875X1.750, providing the tortuous impingement path geometry required for efficient particulate capture and coolant mist collection at rated 350 fpm airflow while maintaining the low resistance to airflow that distinguishes the HK Series from alternative filter technologies. Multiple layers of corrugated aluminum foil mesh and expanded metal are assembled in a criss-cross fashion for rigidity, creating an extended series of directional changes that airborne particulate and droplets must navigate at rated velocity. The criss-cross assembly geometry simultaneously maximizes impingement contact area and maintains drainage channels that guide captured liquid efficiently to the frame corner drain holes. The corrugated foil mesh layers provide the impingement surfaces while the criss-cross pattern creates the structural rigidity needed to resist deformation during washing and maintain media pack geometry across the filter’s service life. The entire media pack is placed between two layers of expanded metal that protect it from physical damage during installation, removal, and washing while maintaining uniform face velocity distribution across the entire filter area. This construction achieves the combination of better average arrestance and low resistance to airflow that are the defining performance characteristics of the HK Series economizer grade filter.
24 Gauge Aluminum Face Grids
24 gauge aluminum face grids on both the air entry and exit sides of the HKAS200750-1-24.625X28.875X1.750 provide uniform airflow distribution across the entire filter face area while protecting the aluminum foil mesh media pack from physical damage during installation, removal, and the moderate washing operations for which the HK Series is rated. The entry-side grid prevents contact damage to the mesh layers during installation in outdoor economizer filter sections and air handling unit filter banks, while the exit-side grid supports the media pack against airflow pressure at rated velocity. The expanded metal grid pattern promotes consistent face velocity that ensures even distribution of airborne particulate across the full filter area, maximizing impingement contact with the foil mesh media and capture efficiency throughout the entire face. Aluminum construction matches the frame and media materials for consistent corrosion resistance, ensuring the face grids maintain structural integrity and airflow characteristics through years of washing cycles and outdoor operating conditions.
Maintenance & Cleaning
The HKAS200750-1-24.625X28.875X1.750 24.625×28.875×1.75 washable aluminum foil mesh air filter requires periodic washing to maintain optimal filtration performance and restore the 5-ply aluminum foil mesh media pack’s capture efficiency. The washing process is straightforward — requiring only access to warm running water — and the AMFCO tech sheet specifies “frequent and moderate” washability for the HKA aluminum model. Regular washing removes accumulated particulate from the foil mesh layers, restores the tortuous path geometry for efficient impingement capture, and clears any drainage paths that may have become partially obstructed. High-powered steam cleaning and chemical dips are unnecessary and not recommended per AMFCO manufacturer specifications.
Washing Procedure
Remove the HKAS200750-1-24.625X28.875X1.750 filter from your HVAC system by sliding it out of the filter housing. Take the filter to a utility sink, hose bib, or outdoor washing area with access to warm running water at moderate pressure. Hold the filter with the dirty face down and rinse from the clean side through to the dirty side, allowing water to carry accumulated dust and debris out through the loaded face. Continue rinsing until water runs completely clear. For filters used in coolant mist or oil mist applications with adhesive residue accumulation, a mild detergent solution can be used followed by a thorough fresh-water rinse. Do NOT use high-pressure washing equipment that could deform the corrugated foil mesh layers or dislodge the media pack from between the expanded metal face guards. Allow the washed filter to air dry or shake off excess water before reinstalling. Since the HKAS200750-1-24.625X28.875X1.750 may be installed in either vertical or horizontal orientation, ensure the drain holes remain unobstructed in the reinstalled position. If Filter Coat adhesive treatment is used, apply it after washing and drying before reinstallation per Filter Coat product instructions.
Washing Frequency Guidelines
The HKA is rated for “frequent and moderate” washing, making it suitable for maintenance programs that require regular cleaning without concern for media degradation from repeated washing cycles. Washing frequency depends on your specific application, particulate loading, and outdoor conditions. Outside air intake and economizer applications in dusty or high-particulate environments may require washing every 1–3 months. Commercial building washable aluminum foil mesh pre-filter applications in moderate-particulate environments typically require washing every 3–6 months under normal conditions. Industrial and coolant mist applications with higher loading rates may require monthly or more frequent washing depending on observed accumulation patterns and system differential pressure trends. For all applications, visual inspection is the most reliable washing indicator — when the foil mesh layers appear visibly loaded with dust or the corner drain holes show signs of partial blockage, washing is warranted regardless of elapsed time.
Optional Filter Coat Treatment
The HK Series washable aluminum foil mesh air filter may optionally be treated with Filter Coat, a water-soluble adhesive and detergent, before installation. Filter Coat can improve fine particulate capture by making foil mesh surfaces tacky for smaller dust particle adhesion. To apply, spray the filter face lightly with Filter Coat before installation per the product instructions. Filter Coat is water-soluble and washes off during routine filter cleaning, so reapplication after each wash cycle is required if adhesive-enhanced particulate capture is desired for your application. AMFCO does not sell Filter Coat nor any adhesive. Contact Metal Air Filters to inquire about Filter Coat availability for use with your HKAS200750-1-24.625X28.875X1.750 installation.
Installation
Installing the HKAS200750-1-24.625X28.875X1.750 24.625×28.875×1.75 washable aluminum foil mesh air filter follows standard procedures for panel air filters in HVAC systems. Unlike some moisture separation filters that require a specific top-up orientation, the HKAS200750-1-24.625X28.875X1.750 may be installed vertically or horizontally in your HVAC system — no particular up/down orientation is required. The corner drain holes accommodate liquid drainage in multiple orientations.
Pre-Installation Checklist
Before installing the HKAS200750-1-24.625X28.875X1.750, verify that your filter housing accepts 24.625×28.875×1.75 nominal size filters with actual interior dimensions accommodating the 24.625” H x 28.875” W x 1-3/4″ D filter, with ±1/8” tolerance on height and width. Confirm your HVAC system operating temperature does not exceed 200°F at the filter location. Identify the three corner drain holes on the filter frame and confirm they will not be blocked by the housing in the installed position. If Filter Coat adhesive treatment is desired, have it available to apply to the filter face before installation. Clean the filter housing interior of accumulated dust and debris from previous filter service.
Installation Steps
Shut down your HVAC system completely before accessing the filter compartment. Remove any existing filter from the housing. Clean the filter housing interior using a vacuum or damp cloth. Insert the HKAS200750-1-24.625X28.875X1.750 into the housing in the desired vertical or horizontal orientation. Press the filter firmly into place ensuring all four edges of the aluminum frame seat properly against the housing walls with no bypass gaps around the perimeter. Secure the filter using the housing’s retention mechanism per your specific system design. Verify that the drain holes in the three corners of the installed filter are unobstructed and positioned to allow collected liquid to exit during operation. Close and secure the filter access door or panel. Restore power and restart the HVAC system. Record the installation date in your maintenance log.
Complementary Products
Metal Air Filters offers a complete range of washable and permanent filter solutions for HVAC applications with different performance requirements, temperature ratings, and filtration strategies. The HKAS200750-1-24.625X28.875X1.750 provides durable low-resistance pre-filtration for outdoor and commercial HVAC applications; the following products address adjacent application requirements.
Washable Electrostatic Air Filters — EC Series
For applications requiring higher-efficiency fine particulate filtration with passive electrostatic technology and MERV 6 performance rated up to 150°F:
• 12x24x1 Washable Electrostatic Air Filter (ECA101224) — MERV 6 passive electrostatic filter for standard residential and commercial HVAC particulate control applications requiring higher efficiency fine dust capture
• 20x20x1 Washable Electrostatic Air Filter (ECA102020) — Popular commercial 20x20x1 electrostatic filter for building HVAC systems where higher-efficiency particulate capture is required indoors
Media Pad Holding Frames — HPG Series
For applications where replaceable filter media pads are preferred over permanent washable filters:
• 12x24x1 Media Pad Holding Frame (HPG101224) — Galvanized steel holding frame for filter media pad replacement strategy in standard commercial HVAC applications
• 20x20x1 Media Pad Holding Frame (HPG102020) — Commercial standard galvanized steel holding frame for applications preferring periodic media replacement over filter washing maintenance
Frequently Asked Questions
How does the HKAS200750-1-24.625X28.875X1.750 washable aluminum foil mesh air filter work?
The HKAS200750-1-24.625X28.875X1.750 operates on the impingement principle: airborne particulate and coolant mist cannot follow the tortuous path through the 5-ply criss-cross aluminum foil mesh layers at rated airflow velocity and collide with the mesh surfaces where they are captured. The criss-cross assembly of corrugated aluminum foil mesh and expanded metal creates the tortuous path with minimal pressure drop, providing better average arrestance while maintaining low resistance to airflow at the 300–500 fpm operating range.
How do I clean and wash the HKAS200750-1-24.625X28.875X1.750?
Remove the filter and rinse with a moderate-to-heavy stream of warm water from the clean side through to the dirty side until water runs completely clear. High-powered steam cleaning and chemical dips are unnecessary and not recommended. Shake off excess water and allow to air dry or reinstall. If Filter Coat adhesive treatment is used, reapply after each wash cycle. Do NOT use high-pressure equipment that could deform the corrugated foil mesh layers.
Does the HKAS200750-1-24.625X28.875X1.750 need to be installed in a specific orientation?
No — the HKAS200750-1-24.625X28.875X1.750 may be installed vertically or horizontally in your HVAC system. Unlike some moisture separation filters that require a specific top-up orientation, the HK Series corner drain holes accommodate liquid drainage in multiple orientations, making installation flexible for the varied duct and housing configurations common in outdoor air intake and economizer applications.
What is the maximum operating temperature of the HKAS200750-1-24.625X28.875X1.750?
The HKAS200750-1-24.625X28.875X1.750 HKA aluminum model is rated for continuous operation at 200°F. This covers the full range of standard commercial and industrial HVAC applications. Note that 200°F is the HKA rating — it is lower than HFA (250°F), HMA (275°F), HMG (325°F), and HMS (900°F) models. Confirm your application does not exceed 200°F before selecting the HKAS200750-1-24.625X28.875X1.750.
What are the actual dimensions of the HKAS200750-1-24.625X28.875X1.750?
The HKAS200750-1-24.625X28.875X1.750 has actual dimensions of 24.625” H x 28.875” W x 1-3/4″ D (±1/8” on H and W). The nominal size is 24.625×28.875×1.75. HK Series filters use a 1/2” undercut on height and width — this means actual height = nominal H minus 1/2” and actual width = nominal W minus 1/2”.
Can I use Filter Coat adhesive on this filter?
Yes — the HK Series washable aluminum foil mesh air filter may optionally be sprayed with Filter Coat, a water-soluble adhesive and detergent, before installation to enhance fine particulate capture. Filter Coat washes off during routine cleaning, so reapplication after each wash is required if adhesive treatment is desired. AMFCO does not sell Filter Coat nor any adhesive — contact Metal Air Filters to inquire about sourcing Filter Coat for your application.
Does the HKAS200750-1-24.625X28.875X1.750 have a MERV rating?
No — the HKAS200750-1-24.625X28.875X1.750 HK Series washable aluminum foil mesh air filter does not carry a MERV rating. It is an economizer grade aluminum foil mesh filter impingement-type filter designed for large airborne particulate and coolant mist capture with low resistance to airflow, not a fine-particulate MERV-rated filter. If MERV-rated performance is required for your application, consider the EC Series washable electrostatic filters (MERV 6) or disposable pleated media alternatives.
How does the HK Series compare to other washable filter lines?
The HK Series (HKA) is an economizer grade aluminum foil mesh filter rated to 200°F at 350 fpm rated airflow, designed for outdoor air intake and washable aluminum foil mesh pre-filter applications emphasizing low resistance to airflow and durable washability. The HF Series (HFA) is a two-stage foam and aluminum mesh filter rated MERV 4 to 250°F at 300 fpm, designed for general HVAC applications requiring MERV-rated performance. The HM Series (HMA) is an impingement-type aluminum screen wire mist eliminator rated to 275°F at 500 fpm, designed specifically for moisture and mist separation in commercial and industrial systems. Each series serves different application requirements and operating conditions.
How often should I wash the HKAS200750-1-24.625X28.875X1.750?
The HKA is rated for “frequent and moderate” washing. Frequency depends on your application: outside air intakes and economizer filter sections and hoods in dusty environments typically require washing every 1–3 months; commercial building washable aluminum foil mesh pre-filter applications in moderate environments typically every 3–6 months; industrial coolant mist applications may require monthly washing. Visual inspection of the foil mesh face is the most reliable washing indicator.
Does this filter work with standard HVAC systems?
The HKAS200750-1-24.625X28.875X1.750 fits standard 24.625×28.875×1.75 nominal filter positions in outside air ducts, economizer hoods, and air handling unit filter sections. It is designed for rated 350 fpm face velocity (recommended range 300–500 fpm), compatible with standard commercial HVAC airflow rates in these applications. Verify your system operates within the 300–500 fpm range at the filter face for optimal filtration performance.
Why Choose the HKAS200750-1-24.625X28.875X1.750 24.625×28.875×1.75 Washable Aluminum Foil Mesh Air Filter?
The HKAS200750-1-24.625X28.875X1.750 HK Series washable aluminum foil mesh air filter delivers a compelling combination of better average arrestance, low resistance to airflow, long service life, and cost-effective permanent washability for outdoor residential, commercial, and industrial HVAC applications. With a rated airflow of 350 fpm across the 300–500 fpm recommended range, the HKAS200750-1-24.625X28.875X1.750 is optimized for the airflow velocities characteristic of outside air intake systems, rooftop economizer filter hoods, and air handling unit washable aluminum foil mesh pre-filter positions where low pressure drop is critical for maintaining system design airflow. The corner drain holes in three frame corners allow collected liquid to exit passively during operation, and the flexible vertical or horizontal installation orientation simplifies retrofitting into existing filter sections without housing modifications.
Built with precision-formed .030” thick aluminum framing, 5-ply criss-cross aluminum foil mesh media assembled between expanded metal face guards, and 24 gauge aluminum face grids on both sides, the HKAS200750-1-24.625X28.875X1.750 combines structural durability with all-aluminum corrosion resistance essential for long-term outdoor service. The 24.625×28.875×1.75 dimensions install in standard outside air intake filter duct, economizer hood, and air handling unit filter bank positions throughout commercial and industrial HVAC infrastructure. The straightforward warm-water washing procedure restores full particulate and coolant mist filtration performance without specialized tools or cleaning agents. Optional Filter Coat adhesive treatment provides enhanced fine particulate capture for applications where additional filtration performance is desired. Made in USA by American Metal Filter Company to exacting dimensional and construction standards, UL Classified 900.
Choosing the HKAS200750-1-24.625X28.875X1.750 permanent washable aluminum foil mesh pre-filter eliminates recurring disposable filter replacement costs while providing reliable large-particulate and coolant mist capture that protects downstream HVAC equipment, coils, and higher-efficiency secondary filter banks. The combination of low resistance to airflow, better average arrestance, 200°F temperature capability, and decades-long all-aluminum durability makes this filter the practical choice for any outdoor air intake, economizer hood, or washable aluminum foil mesh pre-filter application requiring a proven, permanent impingement-type filtration solution in a standard 24.625×28.875×1.75 nominal panel filter footprint.
