Description
Product Overview
The ECAS20 is a custom-cut-to-order 2-inch washable MERV 6 electrostatic air filter engineered for residential, commercial, and light industrial HVAC systems where standard nominal sizes do not fit the available filter housing. Unlike fixed-dimension EC Series filters, the ECAS20 is built to the exact height and width dimensions you specify at the time of order—giving you access to the same passive electrostatic technology, 4-ply aluminum media construction, and MERV 6 performance in any size your application requires. The depth is always 2-inch nominal (1-3/4” actual), and height and width are cut to customer specification.
This custom washable electrostatic air filter is ideal for non-standard HVAC housings, custom-built air handlers, older equipment with unusual filter openings, commercial installations with unique duct dimensions, and any application where the catalog of standard nominal sizes does not include the exact measurement you need. When you order the ECAS20, you provide your required nominal H × W dimensions; our manufacturing partner American Metal Filter Company builds the filter to those specifications using the same .030” thick mill-finished aluminum frame, 24 gauge aluminum face grids, and 4-ply electrostatic air filter media pack used in every EC Series filter in the lineup. The result is a permanently washable, passive washable electrostatic air filter custom-cut to your exact housing dimensions with no premium over standard sizing and no compromise on materials or performance.
Constructed with a precision-formed .030” thick mill-finished aluminum frame, 24 gauge aluminum face grids on both the air entry and exit sides, and a 4-ply electrostatic air filter media pack—one layer of polyester and one layer of polypropylene sandwiched between two expanded metal aluminum face guards—the ECAS20 delivers consistent MERV 6 particulate capture at 84% dust arrestance efficiency with the low system resistance required for compatibility with all standard residential and commercial HVAC equipment. The passive electrostatic polypropylene layer generates its triboelectric charge naturally as air moves through the filter matrix, attracting and holding airborne particulates including dust, pollen, pet dander, mold spores, bacteria, and household debris—no external power source required, no filter media replacements needed.
Unlike disposable cardboard-framed filters requiring complete replacement every 30–90 days, the ECAS20 is designed to be rinsed clean with a moderate stream of warm water and reinstalled—making it a genuinely permanent washable electrostatic air filter filtration solution for any size housing your HVAC system presents. Regular washing restores full particulate-capture efficiency and the passive electrostatic charge regenerates automatically as the filter dries and airflow resumes. Do not apply adhesive coatings to the washable electrostatic air filter media—per manufacturer specifications, it is not advisable to coat EC Series filters with any adhesive coating, as doing so interferes with the passive triboelectric charging mechanism essential for MERV 6 performance.
Made in the USA by American Metal Filter Company (AMFCO), the ECAS20 is manufactured to exacting dimensional and construction standards. The one-time investment in this permanent custom washable electrostatic air filter replaces years of recurring disposable filter costs, reducing household or facility filtration expenditures substantially while eliminating the waste associated with frequent filter disposal. For any HVAC application where a standard-size filter simply does not fit, the ECAS20 delivers the quality, performance, and economics of the EC Series in precisely the dimensions you need.
Online Discount: Save 10% Today
Create a free online account during checkout to instantly receive 10% off your first order. Registered customers also enjoy exclusive benefits including 15% off all repeat orders, priority processing, order history tracking, and expedited reordering. Set up your account by clicking the “Create account?” checkbox during checkout. Commercial and institutional accounts may qualify for NET 30 payment terms with approved credit application.
Key Benefits of the ECAS20 Custom 2-Inch Washable Electrostatic Air Filter
- Any size available — custom-cut to your specification: The ECAS20 is built to the exact nominal H × W dimensions you provide at time of order, making it the ideal solution for non-standard housings, custom air handlers, older equipment with unusual filter openings, and any application where catalog sizes do not fit. Depth is fixed at 2-inch nominal (1-3/4” actual)
- Permanent washable air filter design: Rinse with warm water to restore full electrostatic charge and filtration efficiency—no replacement media required. Eliminates the recurring cost of disposable filters and reduces waste from frequent filter disposal cycles throughout the service life of your HVAC system
- MERV 6 Filtration Performance: 84% dust arrestance efficiency at rated airflow captures dust, pollen, pet dander, mold spores, bacteria, and household debris effectively. Provides residential and commercial air quality management without the airflow restriction of higher-MERV pleated filters that can strain blower motors and increase energy consumption
- Passive Electrostatic Technology: The polypropylene media layer generates an electrostatic charge naturally through the triboelectric effect as air moves through—no electricity, batteries, or external power source required. This passive mechanism attracts and holds airborne particulates more effectively than equivalent-density purely mechanical filter media at the same face velocity
- Lightweight Aluminum Frame Construction: Precision-formed .030” thick mill-finished aluminum frame with mitered corners and pop-rivet assembly provides rigid structural support at a fraction of the weight of steel alternatives. Drain holes in three corners facilitate complete water drainage and rapid drying after each wash cycle
- 4-Ply Media Construction: All EC Series filters feature the same 4-ply electrostatic media pack regardless of depth: one polyester layer and one polypropylene layer between two expanded metal aluminum face guards. This consistent construction delivers reliable MERV 6 performance in every custom-cut ECAS20 regardless of your specified dimensions
- Substantial Long-Term Cost Savings: A single permanent custom washable electrostatic air filter replaces dozens of disposable filters over its service lifetime, delivering meaningful savings over 5, 10, and 20-year horizons while eliminating the procurement, delivery, and disposal overhead of a recurring filter replacement program
- Made in USA by AMFCO: Manufactured by American Metal Filter Company with precision quality control ensuring consistent dimensional accuracy, proper fitment in your custom housing, and reliable MERV 6 performance throughout decades of residential and commercial service. UL Classified 900
Technical Specifications
The ECAS20 custom 2-inch washable electrostatic air filter delivers certified MERV 6 performance specifications validated through industry-standard testing, ensuring reliable particulate capture and consistent airflow characteristics in residential, commercial, and light industrial HVAC applications. All specifications conform to the authoritative AMFCO EC Series Tech Sheet. Height and width are built to your specified nominal dimensions; depth is fixed at 2-inch nominal (1-3/4” actual) for all ECAS20 orders.
| Specifications: | Details: |
|---|---|
| Model Number | ECAS20 (EC Series — Custom-Cut Washable MERV 6 Electrostatic Air Filter, 2-Inch Depth) |
| Nominal Size | Custom — specified at time of order (H × W per customer; depth fixed at 2”) |
| Actual Dimensions | H and W per customer specification (actual = nominal − 1/2” on each dimension); depth 1-3/4” (1.75”) (±1/16”) |
| Frame Material | .030” thick mill-finished aluminum |
| Frame Construction | Precision-mitered corners secured with pop rivets; drain holes in three corners |
| Face Grid Material | 24 gauge aluminum (both air entry and exit sides) |
| Media Construction | 4-ply electrostatic pack: 1 layer polyester + 1 layer polypropylene between 2 expanded metal aluminum face guards |
| Electrostatic Type | Passive — polypropylene media generates electrostatic charge as air passes through (no power source required) |
| MERV Rating | MERV 6 |
| Dust Arrestance | 84% average at rated airflow (ASHRAE 52.2) |
| Dust Holding Capacity | 201 grams per square foot |
| Rated Airflow | 300 FPM face velocity |
| Recommended Airflow Range | 250–350 FPM |
| Maximum Operating Temperature | 150°F |
| Recommended Final Resistance | 0.50 inches W.G. before cleaning |
| Cleaning Method | Rinse with moderate-to-heavy stream of warm water; air dry completely before reinstalling |
| Adhesive Coating | Not supplied from factory; it is not advisable to coat EC Series filters with any adhesive coating |
| Orientation | May be installed vertically or horizontally |
| Filter Weight | Varies by custom dimensions (not determinable in advance) |
| Compliance & Certifications | UL Classified 900 |
| UPC Code | 840373527557 |
| GTIN Code | 00840373527557 |
| Country of Origin | Made in USA |
Residential & Commercial Applications
The ECAS20 custom 2-inch washable electrostatic air filter delivers versatile performance across residential, commercial, and light industrial environments where non-standard or unusual filter housing dimensions make standard catalog sizes impractical or impossible. The passive electrostatic technology and robust aluminum construction make this custom filter suitable for continuous operation in diverse HVAC configurations—from one-of-a-kind custom homes to older commercial buildings with legacy equipment that no longer accepts commonly stocked filter sizes.
Residential HVAC Systems
Homeowners choose the ECAS20 custom washable MERV 6 electrostatic air filter when their forced-air heating and cooling system, heat pump, or split system equipment uses a non-standard filter housing dimension not available in the EC Series standard product catalog. Custom-built homes, historic properties, older construction with non-standard duct configurations, and HVAC retrofits that altered the original filter cabinet dimensions all present situations where a custom-cut filter is the only practical solution. The permanent washable air filter design eliminates the compounded frustration of locating and purchasing non-standard disposable filters repeatedly—with the ECAS20, you order once, wash to maintain, and replace only when the filter sustains physical damage over its decades-long service life. Families with pets appreciate the custom washable electrostatic air filter’s effective pet hair and dander capture without the airflow restriction of high-MERV pleated alternatives. The lightweight .030” aluminum frame makes handling easy during washing and reinstallation regardless of the custom dimensions specified, and the nominal-minus-half-inch sizing convention ensures precise fitment in the actual housing opening once you take accurate measurements.
Commercial HVAC Systems and Office Buildings
Commercial property managers, building operators, and facilities teams choose the ECAS20 custom washable electrostatic air filter for office buildings, retail spaces, and institutional facilities where equipment age, renovation history, or original specification resulted in filter housing dimensions not served by standard catalog sizes. Older commercial buildings constructed before filter size standardization often contain air handling units with unusual nominal dimensions that facilities teams struggle to stock, leading to gaps in filter coverage and inconsistent maintenance. The ECAS20 solves this problem permanently—once you have a custom filter built to your housing dimensions, the wash-and-reinstall cycle replaces ongoing procurement challenges with a simple maintenance routine. Building maintenance teams implementing washable washable electrostatic air filter programs across non-standard equipment convert recurring special-order disposable filter costs into periodic washing schedules, reducing annual filtration expenditures while maintaining consistent MERV 6 air quality throughout occupied spaces. The 2-inch nominal depth is a common commercial specification, and the ECAS20 delivers that depth in any H × W combination your equipment requires.
Light Industrial and Warehouse Operations
Light manufacturing operations, distribution centers, warehouse facilities, and laboratory environments with custom or modified air handling equipment benefit from the ECAS20 custom washable washable electrostatic air filter’s ability to be specified to exact housing dimensions not found in any standard product catalog. Custom-engineered ventilation systems, process air handlers with non-standard filter banks, and retrofit installations that modified original equipment dimensions all represent applications where custom sizing is the only viable path to permanent washable filtration. The passive electrostatic charge captures fine particulates in woodworking shops, light assembly operations, packaging facilities, and clean manufacturing environments, while the washable aluminum construction allows maintenance crews to restore filter performance without special-order disposable filter procurement delays. The 150°F maximum temperature rating covers all standard light industrial HVAC applications, and the custom dimensions ensure proper fitment that prevents bypass airflow in any housing configuration.
Multi-Family Residential Properties
Apartment complexes, condominium developments, townhome communities, and property management companies operating HVAC equipment with non-standard filter dimensions realize significant operational savings by deploying ECAS20 custom washable electrostatic filters permanently sized to their equipment. Multi-family properties with centralized air handling infrastructure that uses unusual filter dimensions face constant procurement challenges sourcing correctly-sized disposable replacements—challenges the ECAS20 resolves permanently. Property management companies serving large portfolios of older buildings with inconsistent filter sizing can obtain custom-cut washable filters for each unique housing dimension, standardizing on a wash-based maintenance program that eliminates per-unit procurement complexity. Condominium associations and cooperative housing boards appreciate the transparent, predictable cost structure of a permanent custom filter program versus the ongoing expense and administrative overhead of locating and stocking non-standard disposable filter sizes across a diverse building portfolio.
How to Order Your Custom Size
Ordering the ECAS20 custom 2-inch washable electrostatic air filter requires knowing your required nominal dimensions—the standard industry convention for specifying filter size. Follow these steps to ensure you receive a filter that fits your housing perfectly:
Step 1: Measure Your Filter Housing Opening
Remove the existing filter (or open the filter access door if no filter is present) and measure the actual interior opening of the filter housing in both height and width. Use a tape measure and record both dimensions to the nearest 1/8”. If an old disposable filter is present, you can also read the nominal size printed on its label—but verify this matches your actual housing opening, as filters sometimes ship in incorrect sizes.
Step 2: Determine Your Nominal Dimensions
Filter nominal sizes are the “named” dimensions used for ordering, which are always larger than the actual filter by 1/2” on each dimension. To convert your measured housing opening to nominal ordering dimensions: add 1/2” to your measured H and add 1/2” to your measured W. The resulting nominal H × W is what you specify when ordering. For example: if your housing opening measures 15.5” × 19.5”, your nominal ordering dimensions are 16” × 20”. The ECAS20 will be built to 15.5” × 19.5” actual dimensions, fitting your 15.5” × 19.5” housing opening with the standard industry clearance.
Step 3: Confirm the Depth
The ECAS20 is 2-inch nominal depth with an actual depth of 1-3/4” (1.75”). Verify your filter housing accommodates this depth before ordering. If your housing requires a different depth, see the ECAS10 (1-inch custom) or contact Metal Air Filters to discuss options.
Step 4: Place Your Order
Enter your required nominal H × W dimensions when ordering the ECAS20. Our team reviews custom orders to ensure the specified dimensions are within manufacturer production limits. Standard lead time for custom-cut filters is typically longer than stock items—contact Metal Air Filters for current production and shipping timelines on your specific custom dimensions. Once received, your ECAS20 is a permanent washable electrostatic filter: wash as needed with warm water and reinstall for decades of service.
Construction Features
The ECAS20 custom 2-inch washable electrostatic air filter represents precision construction engineered for decades of reliable performance across thousands of wash-and-reinstall cycles—regardless of the custom dimensions you specify. Every component is specified to deliver consistent MERV 6 filtration, structural durability, and washing compatibility from the precision-mitered aluminum frame to the 4-ply electrostatic media pack and dual 24 gauge aluminum face grids.
Aluminum Frame Construction
The precision-formed .030” thick mill-finished aluminum perimeter frame provides exceptional structural rigidity while weighing significantly less than steel alternatives, making handling and reinstallation easier for maintenance staff performing regular washing cycles regardless of your custom filter dimensions. The aluminum composition resists corrosion from repeated water exposure during washing, ensuring the frame maintains structural integrity and dimensional accuracy through decades of service without rust, oxidation, or material degradation that could compromise fitment or filtration performance. Precision-mitered corner joints secured with pop rivets create true 90-degree angles that maintain the critical face dimensions within ±1/16” tolerance throughout the filter’s operational lifetime, preventing dimensional changes that could create bypass gaps in your custom housing. Drain holes integrated into three frame corners facilitate complete water drainage after washing, preventing moisture retention that could support biological growth or stress component interfaces. The mill-finished aluminum surface is easy to clean and inspect during washing operations, providing visual confirmation that the frame is free from damage, dimensional distortion, or debris accumulation.
4-Ply Electrostatic Media Pack
The 4-ply electrostatic media pack is the filtration core of every ECAS20 custom filter, combining passive electrostatic charging technology with mechanical filtration to deliver 84% dust arrestance at MERV 6 performance levels across any custom dimension we build. The polypropylene media layer generates an electrostatic charge naturally through the triboelectric effect as air passes through the fiber matrix—no electricity, batteries, or external power source required. This passive charging mechanism attracts and holds fine particulates including dust, pollen, pet dander, and mold spores more effectively than equivalent-density purely mechanical filter media at the same face velocity, providing enhanced particle capture without increased pressure drop. The polyester media layer provides mechanical filtration support, capturing larger particulates and giving structural backing to the polypropylene layer through thousands of airflow cycles and washing operations. Both media layers are sandwiched between two expanded metal aluminum face guards that protect the media from physical damage during handling and installation while supporting the media against airflow pressure across all normal HVAC operating conditions. This consistent 4-ply construction applies to all EC Series filters regardless of depth or custom dimension specification, ensuring reliable MERV 6 performance in every ECAS20 built to your size.
24 Gauge Aluminum Face Grids
24 gauge aluminum face grids on both the air entry and exit sides of every ECAS20 custom filter provide uniform airflow distribution across the entire filter face area while protecting the washable electrostatic air filter media pack from physical damage during installation, removal, and washing—critical for custom-size filters that may be handled in tight or unusual housing configurations. The entry-side grid prevents accidental contact damage to the delicate media fibers during installation procedures, while the exit-side grid supports the media against system airflow pressure across the full range of normal HVAC operating conditions at 250–350 FPM face velocities. The expanded metal grid pattern promotes even pressure distribution that encourages consistent dust loading across the entire filter face, extending washing intervals and maximizing particulate-capture efficiency throughout each service cycle. Aluminum construction matches the frame material for consistent corrosion resistance during washing operations, ensuring the face grids maintain structural integrity and airflow characteristics through decades of cleaning cycles across any custom filter dimension.
Maintenance & Cleaning
The ECAS20 custom 2-inch washable electrostatic air filter requires periodic washing to maintain optimal filtration performance and restore the passive electrostatic charge that captures fine airborne particulates. The washing process requires no specialized equipment—only access to warm running water and a suitable drying location. Proper washing technique extends the filter’s operational lifespan and maintains consistent MERV 6 performance throughout decades of service regardless of your custom filter dimensions.
Washing Procedure
Remove the ECAS20 filter from your HVAC system by sliding it out of the filter housing or releasing any retention hardware per your specific system design. Take the filter to a utility sink, bathtub, shower, or outdoor washing area with access to warm running water at moderate pressure. Hold the filter with the dirty side facing down and rinse from the clean side through to the dirty side, allowing water to carry accumulated dust and particulates out through the loaded face rather than deeper into the media. Continue rinsing until water runs completely clear and no visible dust or particulates remain. For heavily soiled filters, a gentle rinse in the opposite direction first can loosen bound particulates before the primary clean-to-dirty rinse that fully clears the media. Avoid high-pressure washing equipment, stiff bristle brushes, or abrasive cleaning tools that could damage the washable electrostatic air filter media fibers and permanently reduce filtration efficiency. Do NOT apply adhesive coatings, filter sprays, or treatment compounds to the electrostatic media—these materials interfere with the polypropylene media’s passive triboelectric charging mechanism and will degrade filtration performance over time. Allow the washed filter to air dry completely in a clean, protected location before reinstalling—installing a wet filter can promote biological growth inside the HVAC system. The electrostatic charge restores automatically as the filter dries and normal airflow resumes. Typical drying time ranges from 1–4 hours depending on ambient temperature, humidity, and air circulation at the drying location.
Washing Frequency Guidelines
Washing frequency depends on your specific operating environment, particulate loading rates, and observed filter appearance during routine inspection. Most residential applications require washing every 3–6 months under normal household conditions, with higher frequency warranted in homes with multiple pets, heavy outdoor air introduction, or nearby construction and landscaping activity generating elevated particulate loads. Commercial applications with higher air exchange rates or elevated particulate environments may benefit from quarterly washing or more frequent cleaning based on observed dust accumulation and system differential pressure trends. The most reliable indicator for washing timing is visual inspection—when the filter appears visibly loaded with dust accumulation across the face, washing is warranted regardless of elapsed time since the last cleaning cycle. Custom-size filters often serve less common equipment configurations where particulate loading patterns may differ from standard installations; monitor your specific installation’s dust accumulation rate during the first several months to establish an optimal washing interval.
Long-Term Care and Inspection
Inspect the ECAS20 filter during each washing operation for any signs of media damage including tears, holes, or separation between the media and face guards, as these imperfections could allow bypass airflow that compromises filtration effectiveness. Check the aluminum frame for any bending, corner joint loosening, or drain hole obstruction that could affect structural performance or post-wash drainage. The pop-rivet corner construction is designed for decades of service under normal conditions, but periodic joint integrity verification ensures the custom face dimensions are maintained for proper housing fitment throughout the long service life. Store the filter in a protected location during extended periods out of service, away from environments with petroleum-based solvents, aerosol sprays, or chemical vapors that could affect the polypropylene media’s electrostatic charging properties. With proper care and routine washing, the ECAS20 custom washable electrostatic air filter provides decades of consistent MERV 6 performance—one of the most durable and cost-effective filtration solutions available for any HVAC application requiring a non-standard filter size.
Installation
Installing the ECAS20 custom 2-inch washable electrostatic air filter follows straightforward procedures compatible with any filter housing the filter was custom-cut to fit. Professional HVAC contractors or trained maintenance personnel can complete the installation in minutes with no specialized tools or skills required beyond basic familiarity with your specific filter housing design.
Pre-Installation Checklist
Before installing the ECAS20, verify that the custom dimensions you specified match the actual interior opening of your filter housing. Measure the housing opening one final time and confirm the filter’s physical dimensions match (actual dimensions should be nominal minus 1/2” on H and W; depth is 1-3/4” actual). Confirm your HVAC system operating temperature does not exceed 150°F at the filter location—this filter is rated for standard residential and commercial applications only. Ensure the filter is completely dry before installation if it has been recently washed. Identify any airflow direction markings on the filter housing to ensure proper filter orientation during installation. Clean the filter housing interior of accumulated dust from previous filter service before installing the new custom washable electrostatic air filter to prevent contaminating the fresh media.
Installation Steps
Shut down your HVAC system completely before accessing the filter compartment. Remove any existing filter from the housing, noting the airflow direction and filter position for reference. Clean the filter housing interior using a vacuum or damp cloth to remove accumulated dust and debris. Insert the ECAS20 custom filter into the housing with proper airflow orientation—the filter may be installed vertically or horizontally per your application requirements. Press the filter firmly into place ensuring all four edges of the aluminum frame seat properly against the housing walls without visible bypass gaps around the perimeter. If gaps are present, verify your housing measurement and the custom dimensions specified at order match correctly. Secure the filter using the housing’s retention mechanism—spring latches, pressure clips, or access door pressure—per your specific system design. Close and secure the filter access door or panel, ensuring positive sealing against the filter frame to prevent air bypass. Restore power and restart the HVAC system, listening for normal airflow at supply registers and noting any unusual sounds that might indicate improper installation or bypass conditions. Record the installation date in your maintenance log to support future washing schedule planning.
Complementary Products
The ECAS20 custom 2-inch washable electrostatic air filter provides complete, permanent filtration in a single reusable unit. Metal Air Filters also offers complementary permanent and washable MERV 6 air filter products for applications with different performance requirements, temperature ratings, or filtration strategies.
Washable Aluminum Screen Filters — HI Series
For applications requiring heavy-duty industrial-grade washable filtration with 325°F temperature ratings:
• 12x24x1 Washable Aluminum Mesh Filter (HIA101224) — Industrial-grade 5-ply aluminum screen construction for high-temperature or heavy-duty applications exceeding 150°F where the EC Series is not rated
• 20x20x1 Washable Aluminum Mesh Filter (HIA102020) — Popular commercial size in heavy-duty aluminum screen construction for industrial or high-temperature HVAC environments
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
What sizes are available for the ECAS20 custom filter?
The ECAS20 is custom-cut to any H × W nominal dimensions you specify at time of order, up to the manufacturer’s maximum production dimensions. Depth is fixed at 2-inch nominal (1-3/4” actual). There is no minimum size restriction for standard custom orders; contact Metal Air Filters to confirm your specific dimensions are within current production capabilities before placing your order. If you need a 1-inch depth instead, see the ECAS10 custom filter.
How do I measure for a custom filter?
Measure the actual interior opening of your filter housing in both height and width. Then add 1/2” to each measurement to convert to nominal ordering dimensions (nominal = actual + 1/2” on H and W). For example: a housing opening of 17.5” H x 21.5” W means you order nominal 18” H x 22” W. The ECAS20 will be built to 17.5” H x 21.5” W actual, fitting your opening with standard industry clearance. Verify your measurement carefully before ordering, as custom-cut filters are non-returnable once manufactured.
What are the actual dimensions versus the nominal dimensions I order?
Actual dimensions are always 1/2” smaller than nominal on both height and width. The depth is always 1-3/4” (1.75”) actual for the 2-inch nominal depth, with tolerance of ±1/16”. This is the universal industry standard for HVAC electrostatic air filter sizing: nominal 20” H x 25” W becomes 19.5” H x 24.5” W actual. When you provide your nominal H × W at order, your ECAS20 will be built to nominal minus 1/2” on each face dimension.
How long does it take to receive a custom filter?
Custom-cut filters require additional production lead time compared to standard stocked catalog sizes. Typical lead times vary based on current production schedules and the specific dimensions requested. Contact Metal Air Filters directly for current lead time estimates on your custom dimensions before placing your order. Standard and expedited shipping options are available once production is complete. Planning ahead is especially important for facility maintenance schedules or HVAC system commissioning timelines.
How do I clean and wash the ECAS20 custom electrostatic air filter?
Remove the filter from your HVAC system and rinse with a moderate-to-heavy stream of warm water, washing from the clean side through to the dirty side to push accumulated dust out through the loaded face. Continue rinsing until water runs completely clear. Allow the filter to air dry completely before reinstalling. Do NOT apply adhesive coatings or filter spray treatments—per manufacturer specifications, it is not advisable to coat EC Series filters with any adhesive coating as these products interfere with the passive electrostatic charge.
How often should I wash this custom washable electrostatic air filter?
Most residential applications require washing every 3–6 months under normal household conditions. Homes with multiple pets, heavy outdoor air introduction, or elevated dust environments may require more frequent washing. Commercial applications should establish schedules based on visual inspection and differential pressure monitoring. The most reliable indicator is visual inspection—wash when the filter appears visibly loaded with dust accumulation across the face, regardless of elapsed time.
What is the MERV rating and filtration efficiency?
The ECAS20 is rated MERV 6 with 84% dust arrestance efficiency at rated airflow (ASHRAE 52.2). MERV 6 performance captures common household and commercial particulates including dust, pollen, pet dander, mold spores, bacteria, and household debris effectively for standard residential and light commercial air quality applications, while maintaining low airflow resistance compatible with all standard HVAC fan systems.
Can I apply an adhesive coating to this custom electrostatic filter?
No—do NOT apply adhesive coatings, tacky treatments, or filter spray compounds to EC Series electrostatic filters. Per AMFCO manufacturer specifications, it is not advisable to coat EC Series filters with any adhesive coating. These products interfere with the polypropylene media’s passive triboelectric charging mechanism that is essential for MERV 6 filtration performance. The electrostatic charge restores naturally after washing during normal airflow operation—no treatments are needed or beneficial.
What is the maximum operating temperature?
The ECAS20 is rated for maximum continuous operation at 150°F. This covers all standard residential forced-air systems, heat pumps, and the vast majority of commercial HVAC equipment operating under normal conditions. Do not install this filter in applications exceeding 150°F, such as high-temperature process heating, industrial furnace ventilation, or commercial kitchen exhaust systems where temperatures could damage the polypropylene electrostatic media.
How long will this custom washable electrostatic filter last?
With proper care, regular washing, and protection from physical damage during handling, the ECAS20 custom washable electrostatic air filter is designed for decades of reliable service. The aluminum frame resists corrosion from water exposure and the electrostatic media maintains its charge regeneration capability through thousands of normal airflow cycles and washing operations. Many users report 10–20+ years of service from properly maintained EC Series filters. This exceptional longevity provides the economic foundation for significant cost savings compared to years of special-order disposable filter replacement in non-standard housing applications.
Why Choose the ECAS20 Custom 2-Inch Washable Electrostatic Air Filter?
The ECAS20 custom washable MERV 6 electrostatic air filter solves a persistent problem for homeowners and facilities managers whose HVAC equipment does not use standard nominal filter dimensions: it delivers the permanent, cost-effective quality of the EC Series in precisely the size your application requires. For properties with non-standard filter housings, custom-built air handlers, older equipment, or any HVAC installation where catalog sizes simply do not fit, the ECAS20 provides the only practical path to permanent washable filtration with consistent 84% dust arrestance, decade-long service life, and meaningful long-term savings over special-order disposable filter replacement.
Built with precision-formed .030” thick mill-finished aluminum framing, 4-ply passive electrostatic media, and 24 gauge aluminum face grids on both sides, the ECAS20 combines lightweight durability with passive electrostatic charging technology that requires no electricity and no filter media replacements throughout its operational lifetime. The 2-inch nominal depth (1-3/4” actual) is fixed, and your specified H × W dimensions are cut to order using the same manufacturing standards and materials as every other EC Series filter. The straightforward warm-water washing procedure restores full electrostatic performance quickly without specialized tools, chemicals, or training programs. Made in USA by American Metal Filter Company to exacting dimensional and construction standards, this filter delivers the consistent quality and performance that homeowners and professional facilities managers demand from critical HVAC infrastructure—in whatever size they need it.
Choosing the ECAS20 permanent custom washable electrostatic air filter demonstrates environmental responsibility while resolving a real operational challenge. Unlike special-order disposable filters that must be repeatedly sourced, purchased, and disposed of across their product lifetime, the ECAS20 eliminates dozens or hundreds of complete filter assemblies from your waste stream over its service life while maintaining the air quality protection your HVAC system requires. The combination of American manufacturing quality, passive electrostatic MERV 6 performance, decades-long aluminum frame durability, and genuine warm-water washability makes the ECAS20 the intelligent permanent filtration choice for any application where standard sizes simply do not apply.
